Hi guys.
I have had great success summering Amaryllis outside in bright light. I have about 25 of them in assorted pots. Some singles and some three to a pot.
I water frequently (I'm in Florida) and fertilize every 2 weeks with 1/2 strength solution Miracle Gro. throughout the Spring and Summer. In August I switch to very low nitrogen (Fish Emulsion) fertilizer.
Sometime around Mid September I discontinue everything for 3 weeks. I cut back whatever leaves have not shriveled up, clean out any debris that happened into the pots and put them into "carry crates". (From Lowe's) I store them in my shed for 2 months or so. Then pull out a few at a time to come back into bud. It has worked great for the last 8 years.
I had heard from several other people that they never move them off their shelf or whatever and have similar good success. I envy them! Dan