Is my Miscanthus from Walmart an invasive plant?

fogbelt_steve(9)June 2, 2014

I bought a small Miscanthus grass plant at Walmart today. The label doesn't say what kind of Miscanthus it is. I've since been doing a little reading and am learning about some types being invasive, which is the last thing I want in my yard. I think I'll plant it in a pot initially until I decide where to put it. I wished I had done a little research first. Is there a chance my Walmart plant could be invasive?

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donn_(7b-8a)

In zone 9, I would expect Miscanthus to self-sow moderately. It does so in my zone. Growing in a container would not prevent this...only deadheading will.

    Bookmark   June 2, 2014 at 12:57PM
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POGrower

Fine Gardening recently published results of some research on viability of Miscanthus seeds. They concluded that only Giganteus is truly sterile. Good Thing! In my climate they are all functionally sterile.

    Bookmark   June 17, 2014 at 10:21AM
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gardengal48

I think the invasiveness of Miscanthus sinensis is somewhat overstated. First, its seed fertility is not self-compatable. That means you need to cross 2 different cultivars of miscanthus to get fertile seed, just like you would need two different types of apples to get fruit. So growing a single variety is unlikely to result in any self seeding.

The issue arises when there are multiple types of miscanthus being planted or when neighbors may be growing other varieties. Here in my climate, we have mild enough summers that we are lucky to get miscanthus to set a good plumes or seedheads before the cold weather sets in. Seeds simply do not ripen in time to be an issue with this OG.

    Bookmark   June 17, 2014 at 5:39PM
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davidrt28 (zone 7)

"its seed fertility is not self-compatable. That means you need to cross 2 different cultivars of miscanthus to get fertile seed...[]...when neighbors may be growing other varieties."

This is probably the issue. I only had _one_ Miscanthus, but it seeded just enough I decided last year I'd had enough. It wasn't insurmontably weedy, but it was annoying. Although, the bigger issue was I'd always intended it to be temporary, until some BLEs were big enough to be screens.

    Bookmark   June 19, 2014 at 6:19PM
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