[Arid_gardener] Euphrbia Amak "Candleabra Plant"

[Michelle Ledgerwood]

greetings. I am hoping that you are a resource for information on the  
care of the Euphorbia Amak, "Candelabra Plant".  We have a cactus  
that was named this name by Home depot when we bought it.  It has  
been inside the house during winters, however, it has grown to over  
12 feet tall, and is needing a larger pot than can be accommodated  
inside the house.  SO, this coming winter, the plant will be  
outside.  We live in Sacramento California, where winters run from  
about November to about February with temperatures in the low 40's at  
night and high 40s to low 50's during the day.  Rain is periodic, but  
the last few  years we have had spring months (March this year, April  
last year) with rain almost every day.  During those wet spring  
times, temperatures run low fifties at night to high sixties by day.   
During summer, temperatures average high 80's to low 100's by day and  
mid 70's to high 70's at night.

How should we care for this cactus during the winter?  Any special  
care for it during high rain times? and during high heat times?   
Thank you for any information you can offer, if you cannot offer  
information, can you direct us to someone who can?  Thanks.  Kathryn.