Publication 75 covers herbicides for outdoor ornamentals and non-crop areas outside the greenhouse.
Ontario’s latest Guide to Weed Control is now available as a free PDF from OMAFRA. Chapter 16 covers weed control inoutdoor ornamentals, and includes effectiveness ratings for registered products. This publication may also be useful for cleaning up weeds outside the greenhouse.
A hardcopy of the guide (Publication 75) can be ordered from OMAFRA here for a nominal fee.