Garden: Dive into greenery at Chadwick Arboretum’s Spring Plant Sale and Auction The toxins found in poison hemlock do not cause skin rashes or blistering. Many individuals mistake poison ...

Glyphosate, the active ingredient in many nonselective post-emergent herbicides found at your local garden center, will be very effective in controlling poison hemlock in its current stage of growth.

Glyphosate, the active ingredient in many nonselective post-emergent herbicides found at your local garden center, will be very effective in controlling poison hemlock in its current stage of growth.