The following Trade Memoranda contain information on regulatory requirements for fertilizers and supplements regulated under the Fertilizers Act. During a three-year transition, industry can choose to comply with either the old or the updated regulations on a product by product basis. The Trade Memoranda have been updated accordingly.
- T-4-93 – Safety standards for fertilizers and supplements
- T-4-94 – Plant Growth Regulators
- T-4-95 – Signing Authority, Delegated Representatives and Canadian Agents
- T-4-102 – Requirements for fertilizer-pesticides under the Fertilizers Act
- T-4-103 – Conducting research under the Fertilizers Act
- T-4-105 – Requirements for seeds treated with fertilizers or supplements
- T-4-109 – Requirements for microbial supplements
- T-4-110 – Requirements for growing media containing fertilizers or supplements
- T-4-112 – By-products and other "Waste-derived" materials sold as fertilizers or supplements
- T-4-113 – Guidelines to Safety Assessments of Fertilizers and Supplements and to Information to be Submitted in Demonstrating Product Safety
- T-4-116 – Regulatory requirements for products that are or contain polymers
- T-4-120 – Regulation of compost under the Fertilizers Act and Regulations
- T-4-121 – Regulation of phosphite/phosphorus acid materials represented for use as fertilizers
- T-4-122 – Service delivery standards for fertilizer and supplement registration-related submissions under the Fertilizers Act and regulations
- T-4-123 – Requirements for no (zero) and low phosphate lawn / turf fertilizers under the Fertilizers Act and Regulations
- T-4-124 – Export certificates under the Fertilizers Act
- T-4-126 – Identification and taxonomic classification of microorganism(s) represented for use as supplements under the Fertilizers Act
- T-4-127 – Regulation of nitrification and urease inhibitors under the Fertilizers Act and Regulations
- T-4-128 – Customer formula fertilizers
- T-4-129 – Requirements for micronutrient fertilizers
- T-4-130 – Labeling requirements for fertilizers and supplements
- T-4-131 – Record keeping requirements under the Fertilizers Act and Regulations
- T-4-132 – Per - and polyfluoroalkyl substances (PFAS) standard for commercial biosolids imported or sold in Canada as fertilizers
- T-4-133 – Requesting a change to the List of Primary Fertilizer and Supplement Materials