refrigerate hardy Lycoris sprengeri seedling pots?

M. Gastil-Buhl
Tue, 07 Jan 2014 08:21:15 PST
Thank you for the advice Jim (zone 5/6), Kelly (zone 6a/b) and Lee  
(zone 10a). I have added this information to the wiki page here:…

First-hand experience from a wide range of climates is what makes this  
PBS discussion list so valuable. In summary, I realize now that  
Lycoris sprengeri is a cold-winter species which is expected to  
require a cold dormancy. And all agree it does best either in the  
ground or in a deep pot, a 2-gallon tree pot or a pot that deep.

I might not have attempted growing this species except for having seen  
Lee's photos on the wiki and knowing his climate is similar to mine.  
Also I know Diana Chapman has offered this species and I expect she  
grows it from seed as she does the rest of her catalog. It is not much  
colder where she lives. (Diana if you read this could you tell us if  
yours leaf out in the winter pattern or the spring?)

I am interested in the soil temperatures at bulb planting depth  
exactly for this sort of question. Currently in the coldest beds which  
are shaded all day this time of year the soil is still in the mid 40's  
F at 4 to 6 inches deep. My bulb refrigerator is set to the low 40's  
F. So perhaps I need not worry how to fit a 2-gallon tree pot into a  
tiny fridge.

- Gastil
Santa Barbara, California
About zone 9b, significantly colder than the official Santa Barbara  

More information about the pbs mailing list