Vegetable Gardening

Canada Thistle Herbicide

Jkmtgmry added on June 14, 2015 | Answered

Will a Canada thistle herbicide be taken up by food/root vegetable plants (and thus be eaten)? My new home was heavily sprayed last fall professionally for Canadian thistle. The first sweet potato plants I put in this year died but their replacements look fine. I also planted squash, asparagus, raspberry and rhubarb. I'm concerned about residue in my crop.

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Certified GKH Gardening Expert
Answered on June 15, 2015

There is much debate on how long herbicide residue lasts in our ground.

Here is a link that has a great overview.

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