Consultation on prohexadione-calcium and its associated end-use products, Proposed Re-evaluation Decision PRVD2026-01
Current status: Open
Opened on 19 January 2026 and will close for consultation on 19 April 2026.
Health Canada is consulting Canadians on the proposal to continue registration of prohexadione-calcium and associated end-use products registered for sale and use in Canada, with proposed updates to standard label statements.
Prohexadione-calcium is a plant growth regulator, which inhibits the biosynthesis of gibberellins thereby reducing vegetative growth, allowing for a balance between canopy development and fruit production for the registered use on apples and cherries (sweet and tart), and for suppression of runners in strawberries. Prohexadione-calcium is registered for growth management of turfgrass species (bentgrass, annual and perennial Poa annua, Kentucky bluegrass, perennial ryegrass, tall fescue and fine fescue) growing on golf courses, sod farms, sports fields, municipal sites and cemeteries.
Prohexadione-calcium has value as a plant growth regulator in providing a growth management solution. The potential occupational, bystander, residential, dietary, aggregate and environmental risks are considered to be acceptable when products containing prohexadione-calcium are used according to existing label directions. As a result of re-evaluation, no additional mitigation measures are proposed; however, updates to label statements as per current labelling standards are proposed.
Currently registered products containing prohexadione-calcium can be found in the Pesticide Product Information Database and in Appendix I of PRVD2026-01.
For more information on the proposed decision open the "Summary of the Proposed Re-evaluation Decision".
How to get involved
This consultation is open for comment from 19 January 2026 to 19 April 2026 (90 calendar days).
To comment on PRVD2026-01:
- Step 1: Open the summary of the proposed re-evaluation decision to access the document.
- Step 2: Submit comments to the Pest Management Regulatory Agency Publications Section on or before 19 April 2026
Please be sure to include the title of the consultation document on which you are commenting.
Health Canada will consider all comments that are directly related to the proposed decision, received up to 90 days from the date of publication of this document (by 19 April 2026) before making a final decision on the proposed re-evaluation for prohexadione-calcium and its associated end-use products.
Reporting to the people of Canada
Health Canada will make the results of this consultation available on this website. Once the decision is finalized, the PMRA will post a Re-evaluation Decision on the Pesticides and Pest Management Reports and Publications portion of Canada.ca.
If you have any questions, contact the Pest Management Information Service.
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