How To Keep Bishop's Weed Under Control - Knowledgebase Question

Dudley, MA
Question by momdotcom41
May 27, 2001
My sister gave me several large pots of Bishop's Weed for my garden. I realize it is very invasive, but if I create some kind of underground "wall" to block the roots, and cut it back in fall before it spreads it's seeds, won't I be able to keep it in check?

I will be planting it in a very large,full-shade area that I would like an interesting ground cover to grow quickly.

What do you think?


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Answer from NGA
May 27, 2001

0

I think it will cover that area quickly and in all honesty I think it is a risky thing to plant and would discourage you strongly. You might be able to control it seeding about by trimming off the bloom stems (annually, for the rest of your life) but the underground runners are irrepressible in my experience. Mowing along the edges will not contain it. Perhaps a barrier several feet deep would hold it, but I would not want to be responsible for being the one who told you that on the day you realize it has gotten loose. (I have heard of it crossing under sidewalks, for instance.) How does your sister contain it? Perhaps that would work for you too. Perhaps another ground cover would work? Vinca minor, lamium, hostas, golden moneywort, and variegated English ivy could all be considered alternatives.

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