Seeds forum: Osteospermum ecklonis

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Name: Caroline Scott
Calgary (Zone 4a)
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CarolineScott
Aug 17, 2014 6:26 AM CST
I am planning to start some of these from seeds for next year's garden. Somewhere I have heard, or read,--- that they require a chilling after germination in order to obtain flowers.
I can not find the reference. Does anyone know?
Name: Lori
Calgary, Alberta, Canada
Plant Identifier
growitall
Aug 17, 2014 10:57 AM CST
Hmmm, in growing Osteospermum from seed in the past (I admit I haven't grown a lot of annuals in a long time), they performed normally without having to grow the seedlings in any sort of cool conditions... ?
Name: Caroline Scott
Calgary (Zone 4a)
Charter ATP Member Region: Canadian Bulbs Winter Sowing Enjoys or suffers cold winters Lilies
Peonies Plant Lover: Loves 'em all! Garden Ideas: Master Level
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CarolineScott
Aug 17, 2014 9:08 PM CST
Could be the cooling is for growing in warmer climates,
and here they will be cooled when transplanted outside anyway.
Name: Lori
Calgary, Alberta, Canada
Plant Identifier
growitall
Aug 17, 2014 10:30 PM CST
I did read one entry that said, during periods of hot weather, periods with cooler nights promote better blooming... ?
Name: Caroline Scott
Calgary (Zone 4a)
Charter ATP Member Region: Canadian Bulbs Winter Sowing Enjoys or suffers cold winters Lilies
Peonies Plant Lover: Loves 'em all! Garden Ideas: Master Level
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CarolineScott
Aug 18, 2014 6:01 AM CST
It fits Calgary!
They are native to South Africa.
When I grew them before, I had purchased plants which were already blooming.
Name: Allison
NJ (Zone 6a)
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Onewish1
Aug 19, 2014 3:55 AM CST

Moderator

been a while for me as well.. don't think I chilled the seed.. but they are slow growing.. never reached blooming size for me.. some were real late in fall.. gave up trying after the 3rd time
Name: Caroline Scott
Calgary (Zone 4a)
Charter ATP Member Region: Canadian Bulbs Winter Sowing Enjoys or suffers cold winters Lilies
Peonies Plant Lover: Loves 'em all! Garden Ideas: Master Level
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CarolineScott
Aug 19, 2014 8:33 AM CST
I think that it was the plants which were to be chilled, but can not find it now.
Here they are likely to be chilled when planted out in the spring.
Name: Linda
Carmel, IN (Zone 5a)
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mom2goldens
Aug 24, 2014 1:00 PM CST

Moderator

It's been several years since I've grown these from seed, but I don't recall any special treatment of the seeds or plants. They did take quite a while to bloom, though---rather late in the season for me.

Name: Caroline Scott
Calgary (Zone 4a)
Charter ATP Member Region: Canadian Bulbs Winter Sowing Enjoys or suffers cold winters Lilies
Peonies Plant Lover: Loves 'em all! Garden Ideas: Master Level
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CarolineScott
Aug 24, 2014 4:29 PM CST
Thanks for your comments.
We shall see next spring.
Name: Linda
Carmel, IN (Zone 5a)
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mom2goldens
Aug 24, 2014 7:36 PM CST

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Please keep us posted, Caroline. I find it fascinating how our differences in zones can affect our processes.

Linda
Name: Lori
Calgary, Alberta, Canada
Plant Identifier
growitall
Aug 25, 2014 9:01 PM CST
I did a lot of searching, and couldn't find any references that suggested the seedlings need chilling... ? As I mentioned, I found one entry that said that blooming plants slow down their flower production once it gets very hot, but may resume if cooler nights come along, but this didn't seem to refer to seedlings. Given that osteospermum are commonly grown, one would think such a recommendation (i.e. chilling the seedlings) would not be obscure, if it was quite important? Shrug!
Name: Caroline Scott
Calgary (Zone 4a)
Charter ATP Member Region: Canadian Bulbs Winter Sowing Enjoys or suffers cold winters Lilies
Peonies Plant Lover: Loves 'em all! Garden Ideas: Master Level
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CarolineScott
Aug 26, 2014 3:29 AM CST
Yes, I shall just do them the same as any other bedding out plant.
Name: Karen
Cincinnati, Oh (Zone 6a)
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kqcrna
Aug 27, 2014 6:06 AM CST

Moderator

That's been my experience: they just don't tolerate our heat very well. They survive but don't thrive.

I only grew them from seed once, and that was by wintersowing. They did OK in spring, but once the summer heat and humidity arrived they stopped flowering and I could barely keep them alive

Karen
Name: Caroline Scott
Calgary (Zone 4a)
Charter ATP Member Region: Canadian Bulbs Winter Sowing Enjoys or suffers cold winters Lilies
Peonies Plant Lover: Loves 'em all! Garden Ideas: Master Level
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CarolineScott
Aug 27, 2014 6:48 AM CST
A winter sow-might try that too.

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