Can anyone tell me what are the conditions that promote red coloration in
Euphorbia tirucalli "Sticks on Fire"?  Mine is a small plant in a brown
bonsai pot, never fed, watered infrequently.  It is healthy and growing
slowly, but has never been as red as when I bought it about two and a half
years ago.  It was suggested that heat brings out the redness, but I think
that can't be true as it has just experienced over two months of unremitting
heat.  My hunch is that it is full sun and some degree of cold, but I bought
it in San Diego, so how cold could it have been?!
Cathy Ratner, Sunset Zone 23 (Is that the problem?)
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