germination of South African Romulea?

James Hitchmough
Fri, 05 Mar 2010 05:11:16 PST
Mary Sue

Do you think there were any obvious patterns in this: for example did 
home produced seed typically germinate quicker or more fully than 
commercial seed of unknown age, or did it all seem much of a 
"muchness".  Did the commercial seed germinate more in the second year 
than fresh home seed?

Best wishes


 Ittner wrote:
> I have had good germination from autumn sown seed of most species 
> of  winter growing Romulea. There are some species that have proven 
> difficult to impossible but looking over my data base most seed sown 
> in September through early December came up in 4 to 6 weeks. It is 
> one genus that in my experience has often come up in the second year 
> if it doesn't come up in the first year. I just leave my pots out so 
> they dry off once it stops raining here usually in May in Northern 
> California. They stay dry until it starts raining again sometime in 
> the fall. I don't treat the seed of this genus in any special way to 
> assist in germination.
> Many South African irids are reported to need a fluctuation in night 
> and day temperatures to assist in germination. They get that where I 
> live for fall started seed since we often have warm sunny days in the 
> fall, but it cools down a lot at night.
> Mary Sue
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Dr James Hitchmough
Professor of Horticultural Ecology
Department of Landscape
University of Sheffield
S10 2TN  UK

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