Canada Thistle

Canada Thistle is a spiny, deep-rooted perennial weed that spreads aggressively and is hard to control.
Cirsium Arvense
Origin: Europe/ Northern Asia
USDA Hardiness Zones: 2-8
Pros:
Pollinator value – nectar attracts bees and butterflies
Cons:
Spiny – painful to handle and unpleasant in lawns
Deep roots – difficult to fully eradicate
David Kim