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Hypericum Plants

Q.How Can I Eliminate An Invasive Plant From A Steep Hillside? I Believe It’s Hyperium Calcynium.

Zone Oakland, CA | Debs added on June 27, 2022 | Answered

It has tubers that form 1- 1 1/2’ deep in rock and clay. It’s almost impossible to find and dig them all out. It’s been in place for decades so the patch is large. A landscaper told me that it was popular in the 1970’s but that something killed off most of it. He doesn’t know what did it.

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Certified GKH Gardening Expert
Answered on June 29, 2022

Since there may be quite a few restrictions on what methods you are permitted to use in your area, I would opt for a treatment that is without chemical means. Solarizing soil can be a very good way to do so.



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