When in doubt, always choose restraint over extraction.
Don’t collect if the population looks sparse or stressed.
Don’t collect if you’re unsure about species identity.
Don’t collect if you’re in a sensitive ecosystem (wetlands, dunes, riparian zones).
Don’t collect if wildlife is actively depending on that plant (nesting, feeding).

Collect from your own land or obtain permission from private property. Check foraging rules in Bureau of Land Management (BLM) regions.

Actively improve the habitat while you’re there by removing trash or microplastics you encounter.
Pull only small patches of invasive species if you can do it carefully without spreading them or disturbing the soil. Know how the plant spread (seeds vs. roots vs. fragments) before attempting.

Be certain you can confidently identify the plant.
Ensure that the location is clean (e.g., not close to street or downstream from pollution source).

Invasive usefulness is conditional, not moral permission. Even if a plant is labelled “invasive,” don’t automatically assume that removal is always beneficial. Respect its current ecosystem function and be sure the plant is abundant before collecting.
Learn how the plant spreads (seeds vs. roots vs. fragments).
Bag seed heads before cutting plants that spread by seed.
Avoid shaking root or soil that may carry fragments.
Don’t transport soil, root pieces, or seed clusters elsewhere.
Check your socks and shoes for hitchhikers (e.g. cheatgrass likes to stick to them).
Clean tools before leaving an area.