Rose of Sharon Seeds Pesky

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Wally
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Rose of Sharon Seeds Pesky

Post by Wally » September 2nd, 2019, 4:18 pm

Love the plant but hate the seeds. Anyone ever hear of a plant hormone that would render the seeds of Rose of Sharon sterile? Very pesky to control those buggers!

Green
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Re: Rose of Sharon Seeds Pesky

Post by Green » September 2nd, 2019, 4:24 pm

I think the seeds are in the blossoms; if so, the best course of action is to rake them up as much as possible when they drop.

TimmyG
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Re: Rose of Sharon Seeds Pesky

Post by TimmyG » September 2nd, 2019, 10:27 pm

Rake up Rose of Sharon seeds? Ha, good luck with that! The seed pods dry on the plant and burst open while still on the plant, releasing the seeds.

If you like Rose of Sharon, your only option is to replace it with a sterile cultivar, likely a triploid or tetraploid, unless you think deadheading a giant shrub sounds like fun. I've removed over a dozen large plants already this year and plan to remove a few more before the year is up. I have plans to plant only one specimen of sterile 'Diana'. Dealing with Rose of Sharon seedlings is a nightmare task. They have to go (planted by the previous owner, and likely propagated via seedlings).

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Wally
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Re: Rose of Sharon Seeds Pesky

Post by Wally » September 3rd, 2019, 11:04 am

I was cleaning my garden stuff and saw tomato blossom spray. No seeds, sterile tomatoes, which got me thinking, if there was a hormone spray that worked on the hibiscus family, the seeds would be no problem.

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Re: Rose of Sharon Seeds Pesky

Post by TimmyG » September 3rd, 2019, 1:31 pm

From what little I understand of tomato blossom set spray, it's not that the hormone renders the fruit sterile, it's that the hormone triggers fruit to develop and mature regardless of pollination. As long as something (wind or bugs) pollinates the flowers, you'll still get fully developed seeds even with tomato blossom set spray.


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Wally
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Re: Rose of Sharon Seeds Pesky

Post by Wally » September 4th, 2019, 7:03 am

What I need is Hibiscus birth control. Lol

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Re: Rose of Sharon Seeds Pesky

Post by Green » September 5th, 2019, 8:16 pm

I suppose you could try Gallery pre-emergent herbicide on the grass under the bushes. Not sure if it would work on those seeds since they're pretty large, aren't they?

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