Geophytic Delphinium species, was Delphinium carolinianum

Mary Sue Ittner
Wed, 13 Jul 2011 18:00:48 PDT
I grow a lot of these, but haven't found them to be long lived in the 
garden. On the other hand, in containers I move to the shade in the 
summer when they are dormant and only occasionally water, they come 
back nicely. Delphinium nudicaule and D. luteum have lasted the 
longest in the garden. The species are a bit promiscuous and 
hybridize and seed themselves about as the seeds often open when they 
still look green and I haven't gotten around to dead heading them. 
But because of this I can have late flowering ones blooming in pots 
where I didn't plant them from seed that germinated once it started 
to rain in the fall. This year I had one species or another blooming 
from February through June. There are a few left, but they are 
definitely on the way out until the fall. I just grow the California 
species and mostly the coastal/foothill ones. The mountain ones need 
different conditions than I can provide. Some of them are dormant in 
winter (under snow) and need abundant summer water since they are 
found in wet places. The southern California species I have grown 
have dwindled as well.

Mary Sue

Mary Sue Ittner
California's North Coast
Wet mild winters with occasional frost
Dry mild summers 

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