Growing Media, Fertilizers and Related Products

Abbreviations:

USE
A Allowed - restrictions may apply and are described in the annotation
X Prohibited

USE NAME OF MATERIAL ANNOTATION
A Acetic acid, non-synthetic Allowed as an adjuvant to adjust the pH of sprays
A Agar For use in initial mushroom spawn production
A Alfalfa meal & pellets Use organic alfalfa unless commercially unavailable. Ensure non-organic alfalfa is not a product of genetic engineering.
A Algae See 'Aquatic plant products'.
A Amino acids,non-synthetic Amino acids produced by plants, animals and micro-organisms that are not from genetic engineering, and are extracted or isolated by hydrolysis, or by physical or other non-chemical means are considered non-synthetic. Non-synthetic amino acids may be used as plant growth regulators or chelating agents once registered for this use in Canada
X Amino acids, synthetic Amino acids that are considered to be synthetically produced or produced from genetically engineered organisms are prohibited.
X Ammonia products All ammonia products are prohibited for plant nutrition including: anhydrous ammonia, aqua ammonia, ammonium nitrate, ammonium phosphate, ammonium sulphate, and ammonium soaps.
X Ammoniated micronutrients Includes ammonium molybdate, ammonium pentaborate, ammoniated zinc chloride, and ferrous ammonium sulphate. See 'Trace elements (micronutrients)'.
X Ammoniated zinc chloride Prohibited.
X Ammonium lignosulphate Prohibited
X Ammonium molybdate Prohibited.
X Ammonium nitrate Prohibited.
X Ammonium pentaborate Prohibited.
X Ammonium phosphate Prohibited.
X Ammonium soaps Prohibited.
X Ammonium stillage Prohibited
X Ammonium sulphate Prohibited.
X Animal manure, unprocessed Unprocessed animal manure is prohibited for use in any areas or plantings exposed to human contact in urban environments, including food gardens.
A Animal manure, processed Heat-treated, mechanically and physically processed manures may be acceptable. Manure from animals suspected to be suffering from prion diseases must not be used.
X Anhydrous ammonia Prohibited.
X Aqua ammonia Prohibited.
A Aquatic plant products Natural (non-synthetic) extracts are allowed. Extraction with synthetic solvents is prohibited except for potassium hydroxide or sodium hydroxide, provided the amount of solvent used does not exceed the amount necessary for extraction. Of the two products, potassium hydroxide is the preferred choice.
Aquatic plant products are prohibited if they contain other synthetic preservatives, such as formaldehyde, or are fortified with otherwise prohibited plant nutrients.
A Ascorbic acid, non-synthetic Used a s a natural growth promoter and for adjusting the pH of sprays
A Ash Ash from plant and animal sources only. Ashes from burning minerals, manure, or prohibited materials are prohibited. Wood stove ash is allowed only if not contaminated with coloured paper, plastics, other synthetic substances, and heavy metals such as arsenic, cadmium, chromium and lead. (Manure ash is prohibited because burning manure is wasteful of organic matter and nutrients.)
A Basic c opper sulphate May be used to correct documented copper deficiencies only. Shall be used in a manner that prevents excessive copper accumulation in the soil. See 'Copper products, restricted'.
A Basalt Mined or quarried volcanic rock minerals.
A Bentonite See 'Mined minerals, unprocessed'.
A Biodynamic preparations for compost Chamomile (Prep. 503), dandelion (Prep. 506), oak bark (Prep. 505), stinging nettle (Prep. 504), valerian (Prep. 507), and yarrow flowers (Prep. 502).
A Biodynamic preparations for soil & plants Horn manure spray (Prep. 500) or horn silica (Prep. 501). Other Biodynamic preps are listed under "Landscape Health Management Products".
X Biosolids Sewage sludge
A Biotite (iron, magnesium or aluminum silicates) See 'Mined minerals, unprocessed'.
A Blood and blood meal Allowed only if sterilized. Use is discouraged due to the potential spread of prion diseases.
A Bone meal Permitted only if guaranteed free of specific risk materials (e.g. prions associated with Mad Cow Disease). Use is strongly discouraged due to the potential spread of prion diseases.
A Borate Shall only be used with documented deficiency relative to the type of crop. See 'Boron products (allowed)' and 'Boron products (prohibited').
A Borax Also known as sodium tetraborate. Shall only be used with a documented boron deficiency. See 'Boron products (allowed)'.
A Boron products (allowed) The following soluble boron products may be used: sodium tetraborate (borax and anhydrous), and sodium octaborate. Shall only be used with a documented boron deficiency relative to the type of crop. See 'Trace elements (micronutrients)' for documentation requirements.
X Boron products
(prohibited)		 Ammonium pentaborate is prohibited.
X Burned lime Prohibited.
A Calcium chloride Natural sources and food grade quality only. Can be used to adjust nutrient deficiencies and physiological disorders
A Calcium, natural sources Sources include shells from aquatic animals, limestone, dolomite (not slaked), aragonite, eggshell meal, lime from sugar processing and mined CaCO3.
X Calcium sources
(prohibited)		 Calcium products which have been used in controlled atmosphere storage are prohibited.
X Calcium hydroxide Also known as hot lime or quicklime
A Calcium lignosulfonate Lignin sulfonate. See 'Chelates (allowed)'
X Calcium nitrate Prohibited.
X Calcium oxide Also known as Burned Lime.
A Calcium sulphate See 'Gypsum (mined source)'. Sulphates produced using sulfuric acid are prohibited.
X Calcium, synthetically derived Prohibited.
A Cannery wastes May contain substantial pesticide residues. Use only if certified organically grown, documented to be uncontaminated by pesticides or thoroughly composted before use.
A Cardboard Cardboard that is not waxed or impregnated with fungicides or other prohibited substances may be used as mulch or compost feedstock.
A Cardboard, waxed Paraffin contained in waxed cardboard used as a mulch or compost ingredient shall not exceed 0.75% by weight of the total feed stock.
A Chelates (allowed) Natural chelates (such as amino acids, citric acid, tartaric acid, and other di- and tri- acid chelates) ,and lignin sulfonate are allowed. Synthetic chelating agents are not allowed with micronutrients unless they are specifically listed for such use.
X Chelates (prohibited) Prohibited chelating agents include DTPA, EDTA, HEDTA, NTA, glucoheptonic acid and its salts, and synthetic amino acids.
X Chilean nitrate See 'Sodium nitrate'.
A Chloride of Lime See 'Calcium chloride'
A Clay See 'Mined minerals, unprocessed'.
Bentonite, perlite and zeolite as a soil amendment or seed pellet additive.
A Coal See 'Humic acid'
A Colloidal Rock Phosphate Shall not be fortified or processed with synthetic chemicals. Cadmium shall not exceed 90 mg/kg P2O5
A Compost Composting refers to the managed aerobic process by which organic materials are digested by microorganisms over sufficient time and / or with sufficient heat to effectively stabilize the nutrients, reduce pesticide residues, and kill weed seeds and pathogens. Thermophilic aerobic compost piles shall reach a temperature of 55-60 degrees C (130 – 140 degrees F) for a period of several days and then finish decomposing for about 6 weeks. Compost should remain moist but not water logged for the whole decomposition period.

Organic waste material derived from industrial processing including abattoir waste, yeast fermentation waste, whey, hatchery waste, fish farm wastes, mushroom compost and paper and wood products are restricted products and documentation and/or appropriate laboratory analysis for the absence of contamination by materials prohibited in these standards is required. Acceptable materials include animal manure, by-products of the processing of agricultural products, and source separated yard debris.

The following are prohibited in compost: sewage sludge, synthetically fortified compost starter, glossy paper, and coloured ink. Paraffin from waxed cardboard cannot exceed 0.75% of total feed stock by weight.
See also: 'Microbial products' for information on compost starters.

Spent mushroom and vermiculite substrate: natural substance or those derived from natural substances without the addition of chemically synthesized substances or chemical treatment.

Composted animal excrements, including poultry: natural substance or those derived from natural substance without the addition of chemically synthesized substances or chemical treatment.

Compost from off-site, organic or non-organic sources; on-site, organic or non-organic sources: natural substances or those derived from natural substances without the addition of chemically synthesized substances or chemical treatment, in accordance with this standard.
A Compost tea Compost must be made from a substance that meets compost standards.
X Copper ammonia base Prohibited.
X Copper ammonium carbonate Prohibited.
X Copper nitrate Prohibited.
A Copper oxide May be used to correct documented copper deficiencies only. Shall be used in a manner that prevents excessive copper accumulation in the soil. See 'Copper products'.
A Copper oxysulphate May be used to correct documented copper deficiencies only. Shall be used in a manner that prevents excessive copper accumulation in the soil. See 'Copper products'.
A Copper products
(allowed)		 Basic copper sulphate, copper oxide, copper sulphate, and copper oxysulphate may be used to correct documented copper deficiencies.
These shall be used in a manner that prevents excessive copper accumulation in the soil. Buildup of copper in soil may prohibit future use. Use with caution.
X Coper products
(prohibited)		 Copper ammonia base, copper ammonium carbonate, copper nitrate and cuprous chloride are prohibited as sources of copper for plant nutrients.
A Copper sulphate May be used to correct documented copper deficiencies only. Shall be used in a manner that prevents excessive copper accumulation in the soil. See 'Copper products'.
A Corn gluten meal Must be from non genetically engineered plants.
A Corn meal Must be from non genetically engineered plants.
A Crab shells Allowed.
X Cuprous chloride Prohibited as a source of copper for plant nutrients.
Cytokinins See 'Growth regulators (allowed) and (prohibited)'.
A Di-acid chelates See 'Chelates (allowed)'
X Dolomite, fired Magnesium oxide. Prohibited.
A Dolomite, mined Magnesium carbonate and calcium carbonate. May cause build-up of magnesium. Use with caution. Must be from a natural source. See 'Limestone'
X Dolomite, slaked Magnesium hydroxide. Prohibited.
X DTPA Prohibited.
X EDTA Prohibited.
A Egg shell meal Allowed.
A Enzymes Acceptable if derived microbiologically from natural substances and not fortified with synthetic plant nutrients. Shall not be obtained through genetic engineering.
A Epsom salts See 'Magnesium sulphate'.
A Feather meal If composed of feather meal only and unadulterated with non-allowed materials.
A Feldspar See 'Mined minerals, unprocessed'.
A Ferric and ferrous compounds
(allowed)		 Includes ferric oxide, ferric sulphate and ferrous sulphate. See 'Iron products (restricted)' and 'Trace elements (micronutrients)'
X Ferric and ferrous compounds (prohibited) Includes ferric chloride and ferrous ammonium sulphate. See 'Iron products (prohibited)' and 'Trace elements (micronutrients)'.
X Ferric chloride Prohibited for use as a source of plant nutrients.
A Ferric oxide May be used where a soil or plant nutrient deficiency is documented by soil or tissue testing.
A Ferric sulfate May be used where a soil or plant nutrient deficiency is documented by soil or tissue testing.
X Ferrous ammonium sulphate Prohibited for use as a source of plant nutrients.
A Ferrous sulphate May be used where a soil or plant nutrient deficiency is documented by soil or tissue testing.
A Fertilizers, blended
(allowed)		 If composed entirely of allowed materials. See classification for each separate ingredient. Inert ingredients for pelletizers, etc. must be individually approved or be from natural sources. Restrictions for any one ingredient shall apply to thewhole fertilizer mixture.
X Fertilizers, blended (prohibited) If the product contains any prohibited materials.
A Fiber row covers Shall not be incorporated into the soil or left in the field to decompose; shall be removed at the end of the growing season.
A Fish emulsion or solubles See 'Fish products'.
A Fish farm wastes Shall be composted
A Fish hydrolysate See 'Fish products'.
A Fish meal, powder See 'Fish products'.
A Fish products Natural substance or those derived from natural substances without the addition of chemically synthesized substances or chemical treatment.

Liquid fish products can be pH adjusted using (in preferential order) organic vinegar, organic citric acid , or phosphoric acid. The amount of acid used cannot exceed the minimum amount needed to lower the pH to 3.5.

Fish products are prohibited if they contain other synthetic preservatives or are fortified with otherwise prohibited plant nutrients.
X Formaldehyde Prohibited.
A Fulvic acids Dilute neutral or acidic extracts of humates
X Genetically engineered organisms Prohibited in any form
A Gibberellic acid Acceptable if made from a fermentation process and not fortified with prohibited synthetic substances. The fermentation process shall not use genetically engineered organisms. See 'Growth regulators for plants (allowed and prohibited)'.
A Glauconite Also known as Greensand. See 'Mined minerals'.
X Glucoheptonic acid Glucoheptonic acid and its salts are prohibited as chelating agents in fertilizers.
A Granite dust (allowed) See 'Mined minerals'. Sources that are mixed with petroleum products, such as from stone engraving, are prohibited.
A Grass clippings See 'Plants'. Crop wastes that potentially contain significant levels of pesticide contaminants are prohibited.
A Green manure See 'Plants'.
A Greensand Also known as Glauconite. See 'Mined minerals'.
A Growth regulators for plants (allowed) Natural plant hormones such as gibberellic acid, indole acetic acid (IAA) and cytokinins are allowed. Vitamin B1 is also allowed. Must not contain prohibited synthetic substances.
X Growth regulators for plants (prohibited) All synthetic growth regulators not explicitly allowed are prohibited. Includes all formulations of the propagation hormone IBA (Indol-3-butyric acid) as well as the growth regulator NAA (1-Naphthalene acetic acid).
A Guano, bat or bird Shall be decomposed and dried deposits from wild bats or birds. Domesticated fowl excrement is considered 'manure'; not 'guano'. See 'Compost' for the definition of compost.
X Gypsum,
by-product		 Gypsum produced as a by-product of superphosphate manufacture (the reaction of rock phosphate and sulphuric acid), from precipitation of sulphur dioxide gas with limestone, or from dry-wall rejects is prohibited.
A Gypsum, mined Calcium sulphate. Mined source; for correcting calcium and/ or sulfur deficiencies and for amending soil salinity problems documented by soil and / or plant tissue testing.
A Hay See 'Plants'. Crop wastes that potentially contain significant levels of pesticide contaminants are restricted.
X HEDTA Prohibited as a chelating agent in fertilizers.
Hormones See 'Growth regulators for plants (allowed & prohibited)'.
X Hot lime Also known as calcium hydroxide or quicklime
X Human excrement Prohibited.
A Humic acid Dilute potassium hydroxide extracts of mined sources
A Humus from worms and insects (vermi-compost) If made with materials in accordance with this standard.
X Hydrated lime Also known as Slaked Lime.
A Hydrated magnesium sulphate Epsom salts and Kieserite. Sulphates produced using sulfuric acid are prohibited.
Indole acetic acid See 'Growth regulators for plants (allowed & prohibited)'.
Inoculants See 'Microbial products'.
A Iodine Non-elemental and not to exceed 5% solution by volume
A Iron citrate May be used where a soil or plant nutrient deficiency is documented by soil or tissue testing.
A Iron products (allowed) Ferric oxide, ferric sulphate, ferrous sulphate, iron citrate, iron sulphate or iron tartrate may be used where a soil or plant nutrient deficiency is documented by soil or tissue testing.
X Iron products (prohibited) Includes ferrous ammonium sulphate, ferric chloride, iron nitrate and synthetic iron phosphate. See 'Trace elements (micronutrients)'.
A Iron sulphates May be used where a soil or plant nutrient deficiency is documented by soil or tissue testing. Sulphates produced using sulfuric acid are prohibited.
A Iron tartrate May be used where a soil or plant nutrient deficiency is documented by soil or tissue testing. Sulphates produced using sulfuric acid are prohibited.
A Kaolin clay Allowed
A Kelp and kelp products See 'Aquatic plant products'.
A Kieserite See 'Mined minerals'
A Langbeinite Also known as sulphate of potash magnesia. See 'Mined minerals'.
A Leaf mould See 'Plants'.
X Leather by-products Residues from hide processing. Likely to be highly contaminated with synthetic metals or solvents which are used in leather processing. Includes leather meal, leather tankage, and leather dust.
Leonardite See 'Humic acid'
A Lignin
sulfonate		 See 'Chelates (allowed)'.
Lignite See 'Humic acid'
A Lignosulfonic acid See 'Chelates (allowed)'.
X Lime, burned Calcium oxide, also known as quicklime.
X Lime, hot Also known as calcium hydroxide. Prohibited.
X Lime, slaked Calcium hydroxide. Also known as hydrated lime.
A Limestone (allowed) Magnesium carbonate and calcium carbonate. May cause build-up of magnesium. Use with caution. Shall be from natural source. Oyster shell flour, limestone, dolomite (not slaked), aragonite, eggshell meal, lime from sugar processing and mined CaCO3 are allowed.
Calcium products that have been used in controlled atmosphere storage are prohibited.
X Lye Prohibited for use in landscapes or plant production such as for adjusting pH.
A Magnesium carbonate Naturally occurring in dolomite and magnesite.
A Magnesium
chloride		 Natural sources only.
X Magnesium oxide Prohibited. Produced by heating magnesium carbonate.
A Magnesium rock Natural substance or those derived from natural substances without addition of chemically synthesized substances or chemical treatments. See 'Mined minerals'.
A Magnesium sulphate, mined As Kieserite or Epsom salts. See 'Mined minerals'. Permitted if mined. Sulphates produced using sulfuric acid are prohibited.
From natural sources as soil/plant amendments included with micronutrients; for use as a soil amendments where there is evidence of documented magnesium deficiency.
A Magnesium sulphate, synthetic As synthetically produced Epsom salts. Allowed for use with a documented magnesium deficiency.
A Manganese products (allowed) Manganous oxide and manganese sulphate may be used to correct documented manganese deficiencies. See 'Trace elements (micronutrients)'.
X Manganese products (prohibited) Manganese chloride, manganese nitrate and potassium permanganate are prohibited. See 'Trace elements (micronutrients)'.
X Manganese chloride Prohibited.
X Manganese nitrate Prohibited.
A Manganese sulphate May be used to correct documented manganese deficiencies.
A Manganous oxide May be used to correct documented manganese deficiencies.
A Manure See 'Animal manure, unprocessed and processed'
A Manure tea Must be made from composted manure. Must not come into contact with edible plant parts. Must be used with other soil building practices.
A Mica See 'Mined minerals, unprocessed'.
A Microbial inoculants See 'Microbial products'.
A Microbial products Allowable microbial products include Rhizobium bacteria, mycorrhizal fungi, Azolla, yeast and other microorganisms on compost, plants, seeds, soils and other components of the organic operation.

Ionizing radiation is allowed for use on peat moss carrier only, before addition of microbial inoculants. Radiation is otherwise prohibited.

Genetically engineered organisms or viruses are prohibited.

Microbial products are prohibited if the final product contains synthetic preservatives such as sodium sulphite, or they are fortified with otherwise prohibited plant nutrients.
Micronutrients, synthetic See 'Trace elements (micronutrients)'.
A Mined minerals, and unprocessed mined minerals A mined mineral must not have undergone any change in its molecular structure thorough heating or combining with other substances. Acceptable if the substance is not processed or fortified with synthetic chemicals. Mined minerals are regarded as supplements to a balanced organic soil building program. Some of the minerals that are mined can also be made synthetically or are byproducts of industry; investigate the source of any new substance. Sodium nitrate is prohibited.
A Molasses Shall be organic molasses unless not commercially available.
A Molybdenum products To correct documented molybdenum deficiencies. See 'Trace elements (micronutrients)'.
A Mulch
 Non-organic sources of straw, leaves, grass clippings or hay shall be free of pesticides and other contaminants. Wood chips and sawdust shall be from untreated wood. Cedar and Redwood contain compounds that make these materials unsuitable for application in most planted areas. Organic matter in the form of plant residues from organic sources is allowed for mulching.
A Muriate of potash Mined potassium salts (e.g. sylvinite, kainite)
A Mushroom compost See 'Compost'.
A Naturally occurring biological organisms (e.g. worms) and their products Worm castings (vermi-compost) from organic or non-organic manure sources in accordance with this standard.
A Newspaper
(allowed)		 Plain paper and paper printed with vegetable based inks is allowed as a mulch or compost ingredient. May cause build-up of aluminum. Use with caution.
X Newspaper
(prohibited)		 Coloured or glossy paper is prohibited for use as a mulch or compost ingredient.
X Niter Also known as potassium nitrate. No mined source of niter has been verified at this time.
X Nitrate of soda-potash Prohibited.
X NTA Prohibited.
A Oyster shell flour Ground shells from oysters. See 'Limestone'
A Paper
(allowed)		 Plain paper and paper printed with vegetable based inks is allowed as a mulch or compost ingredient. May cause build-up of aluminum. Use with caution.
X Paper
(prohibited)		 Coloured or glossy paper is prohibited for use as a mulch or compost ingredient.
A Peat moss Shall not contain synthetic wetting agents.
A Pelletising materials
(allowed)		 Clay, gypsum or other non-synthetic coatings are allowed.
X Pelletising materials
(prohibited)		 Plastic polymers and other synthetic substances are prohibited.
A Perlite Allowed.
X Permanganate of potash Prohibited.
Plant hormones See 'Growth regulators for plants (allowed) or (prohibited)'.
A pH buffers
(allowed)		 Shall be from a natural source such as citric acid or vinegar.
X pH buffers
(prohibited)		 Lye and sulphuric acid are prohibited for use as pH buffers.
A Phosphate rock Shall not be fortified or processed with synthetic chemicals. Cadmium shall not exceed 90mg/kg P2O2
X Phosphoric acid, synthetic Prohibited.
X Piperonyl butoxide Although this material is derived from a plant source originally, it undergoes a substantial molecular change during its extraction and processing and must not be used in organic food production. Check the labels on botanicals to make sure this is not in the product.
A Plant (vegetative) by-products Those derived from natural substances without the addition of chemically synthesized substances or chemical treatment. Organic sources shall be used unless commercially unavailable.
A Plants Includes plant preparations of aquatic or terrestrial plants or parts of plants such as cover crops, green manure, crop wastes, hay, leaves and straw. Parts of plants used as soil amendments and foliar feeds are permitted.

Plant wastes that potentially contain significant levels of pesticide contaminants are prohibited.
X Plastic mulches Prohibited for permanent use in perennial landscapes.
A Pomaces Shall be from certified organically grown fruits or vegetables, documented free of contaminants, or shall be aerobically composted before use.
A Potassium chloride Mined potassium salts (e.g. sylvinite, kainite)
X Potassium nitrate Prohibited.
X Potassium permanganate Prohibited.
A Potassium rock powders Includes basalt, biotite, mica, feldspars, granite and greensand.
A Potassium sulphate,
non-synthetic		 Only from langbeinite or other natural sources. See 'Mined minerals, unprocessed'.
X Potassium sulphate, synthetic Only from langbeinite or other natural sources. See 'Mined minerals, unprocessed'.
A Potassium sulfate magnesia Langbeinite
A Potting soil Shall not contain synthetic wetting agents or synthetic fertilizers
A Pumice Allowed.
X Quicklime Also known as calcium hydroxide or hot lime. Prohibited.
A Rock dusts (stone meal) unprocessed See 'Mined minerals'.
A Rock Phosphate Shall not be fortified or processed with synthetic chemicals. Cadmium shall not exceed 90mg/kg P2O2
A Rock potash Mined potassium salts (e.g. sylvinite, kainite)
A Sand Shall not contain prohibited substances
A Sawdust & wood chips. Shall be from untreated and unpainted wood. Natural substance or those derived from natural substances; shall be free from wood that has been treated with prohibited substances. Cedar and Redwood contain compounds that make these materials unsuitable for application in most planted areas.
A Seaweed and seaweed products See 'Aquatic plant products'.
X Sewage sludge Prohibited.
A Shells from aquatic animals Allowed.
X Slaked lime Prohibited
X Sodium nitrate (Chilean nitrate) Prohibited for use as a fertilizer.
A Sodium octaborate May be used only with a documented boron deficiency.
X Sodium sulphite Used as a preservative. Prohibited.
A Sodium teraborate May be used only with a documented boron deficiency.
A Soil From organic sources in accordance with this standard
A Soybean meal Use organic soybean sources unless not commercially available. Shall not be from genetically engineered soybeans.
A Sphagnum moss Shall not contain synthetic wetting agents.
A Stillage and stillage extract Ammonium stillage is prohibited
A Straw See 'Plants'
A Sugar Organic sugar is allowed as an ingredient in a formulation
A Sulphate of potash magnesia From langbeinite. See 'Mined minerals'
Natural substance or those derived from natural substances without the addition of chemically synthesized substances or chemical treatment.
A Sulphates of zinc or iron May be used only to correct for deficiencies determined by soil or plant tissue testing. Sulphates produced using sulfuric acid are prohibited. See iron products.
A Sulphur, elemental Sulphur may be used as a soil amendment where more buffered sources of sulphur are not appropriate, and for foliar application.
Natural substance or those derived from natural substances without the addition of chemically synthesized substances or chemical treatment.
X Sulphuric acid Prohibited as a pH buffer.
X Super phosphate Prohibited.
A Tartaric acid See 'Chelates (allowed)'.
A Topsoil See 'Soil'.
A Trace elements (micronutrients) Includes micronutrients from natural sources that are unchelated or chelated by materials listed as allowed. To be used when soil and plant deficiencies are documented via soil and / or plant testing.
A Transplant media
(allowed)		 Must be composed entirely of allowed materials.
A Transplanting & Potting media Shall be composed entirely of allowed substances
A Tri-acid chelates See 'Chelates (allowed)'.
A Vermicasts See 'Worm castings'
A Vermiculite Allowed.
A Vinegar Organic vinegar is allowed as a pH buffer.
A Vitamins (allowed) Non-synthetic sources of all vitamins and synthetic sources of vitamins B1, C, and E are allowed.
X Vitamins, synthetic All synthetic vitamins not explicitly allowed are prohibited. Synthetic forms of vitamins B1, C and E are allowed.
A Water, reclaimed Reclaimed water shall comply with federal, provincial and local standards and may be used only on non-edible parts of food crops and crops not for human consumption. Use on edible plant parts and root crops is prohibited.
A Wood ash Wood ash shall be produced exclusively from untreated and unpainted wood. Wood stove ashes must be free of contaminants from coloured paper, plastic, etc. Excessive applications of ash can cause pH and nutrient imbalances. See 'Ash'.

Natural substance from plant and animal sources only, and those derived from natural substances without the addition of chemically synthesized substances or chemical treatments. Ashes from burning minerals, manure or prohibited substances are prohibited.
A Wood chips and shavings Shall be from untreated and unpainted wood. Shall be free from prohibited substances
Cedar and Redwood contain compounds that make these materials unsuitable for application in most planted areas.
A Worm castings Allowed if made from organic manure. Compost made from non-organic manure by worms shall be demonstrated to be free of antibiotics.
A Yeast See 'Microbial products'.
A Yucca products Shall not contain prohibited ingredients.
A Zeolite See 'Mined minerals, unprocessed'.
X Zinc ammonium sulfate Prohibited.
X Zinc chloride Prohibited.
X Zinc nitrate Prohibited.
A Zinc products (allowed) Zinc oxide and zinc sulphate may be used to correct a documented zinc deficiency. See 'Trace elements (micronutrients)'.
X Zinc products (prohibited) Zinc ammonium sulphate, zinc chloride and zinc nitrate are prohibited. See micronutrients, synthetic, prohibited.
A Zinc oxide May be used only with a documented zinc deficiency.
A Zinc sulphate May be used for foliar sprays or soil application if there is a documented deficiency. See 'Zinc products (restricted).

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