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| Sorry for the dupe..... Posted in annuals also.. |
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| Well, I've never grown Lobelia but after doing a little web searching it appears that the Riviera Rose is a tender perennial that's usually grown as an annual. Although not always necessary, cold/moist stratification is usually helpful in regard to seed germination of perennials. Personally, I cold stratify all my perennial seed in the refrigerator. Even if it's not absolutely necessary, it can't hurt anything and usually seems to be very helpful. Some websites say that cold stratification is necessary in order for Riviera Rose seeds to break dormancy (others of course disagree. In your post, you didn't mention anything about stratifying the seeds before sowing them. You may want to do that the next time just to see if it helps. As I said, it sure can't hurt anything. Art |
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| I grow the standard "Fountain Blue" Lobelia from seed every year with no fuss. The riviera rose must be more particular. The one site I checked said average germination time is 20 days at 70 degrees. Is it possible that you are giving them to much heat? |
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| Are the seeds pelleted or raw? You say you are using heat/light, is it possible you are cooking the seeds? Are they drying out? |
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- Posted by started_with_bean Zone 5--MA (My Page) on Wed, Jan 9, 13 at 16:47
| Last year I grew Lobelia Riveria Blue, and they were also very difficult to germinate, and I had been growing Cascade blue ones without fail for a couple of years (both commercial and collected seeds). I,too, did a 2nd sowing because the first sowing had dismal germination. The germination rate was still very low, and the sad few that made it didn't do much the whole season. My seeds were from Swallowtail Gardens. I'm moving onto the Trailing Sapphires instead. Perhaps the trailing ones are less finicky than the uprights? |
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