I had Monkshood perennial in my flower garden for 2-3 years. I removed it from this spot because I want a vegetable garden there instead . Is my soil safe, now that plant was removed? It came out very easy. It has only been two days , but it is doing fine in its new spot away from my now vegetable garden.
I did find a notation not to plant it near a vegetable garden where plants with tubers were located. People might confuse the fleshy tubers of Monkshood with a vegetable such as Jerusalem artichokes. But I didn't see any reference to the poisons leeching into the soil.
https://plants.ces.ncsu.edu/plants/aconitum/
http://www.missouribotanicalgarden.org/PlantFinder/PlantFinderDetails.aspx?kempercode=h300
I usually treat them with sevin powder but that product no longer available in Alberta. In ally found some BTK and sprayed it on today. I should hv done this weeks ago and now I’m afraid it’s too late. If I cut the plants back will they regrow and produce blooms?
This lovely, toxic plant should bloom again in the fall. If you prune them carefully and keep the spent flowers plucked it should be alright. Here are a couple articles:
https://www.gardeningknowhow.com/ornamental/flowers/monkshood/growing-monkshood-plants.htm
https://www.gardeningknowhow.com/plant-problems/pests/insects/leafroller-damage-control.htm