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Seeds that won't sprout will float if you soak them in water?

Posted by peterk312 none (My Page) on
Wed, Apr 27, 11 at 19:56

I read that only seeds that sink to the bottom of a bowl of water will sprout. Is this true? I've got 25 Moonflower seeds in a bowl of water and four of them are floating. It's not worth planting these?


Follow-Up Postings:

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RE: Seeds that won't sprout will float if you soak them in water?

That is true for some seeds, but can not be applied to all seeds. I would not use it as a screening for seed viability. Al


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RE: Seeds that won't sprout will float if you soak them in water?

Agreed. You don't say what kind of Moonflower but if it is an Ipomoea you can gently nick the seeds to allow water to penetrate the seed coat and "sink" them.


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RE: Seeds that won't sprout will float if you soak them in water?

Thanks for the responses. Indeed, the seeds I'm asking about are Ipomoea alba.

I decided to plant all of the seeds, floaters and non-floaters. Using a nail clipper, I also scarified the seeds that still had a hard outer shell after soaking. Since my first post I read at a different forum that this idea that seeds float in water when they've lost their viability is more folklore than a science. We'll see.


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