Growing Amaryllis under Lights

arnold trachtenberg
Wed, 16 Nov 2005 12:15:10 PST

I grow many South African bulbs under lights in the basement.  I use 
either a metal halide HID or a sodium HID.  The sodium has an orange 
color that can made the flowers look off color.  I run the light twelve 
hours per day and use a small fan to provide some air movement. 

A would question the effort to continue to grow the amaryllis, a rest 
period can be necessary to induce flowering.  I place my amaryllis in 
the basement in a dark spot and withhold water and give a drink only 
when I see the emergence of a flower spike.


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