My "Amaryllis Bed" is really a bed of all sorts of mixed bulbs. I've got a lot of the smaller crinums, spider lilies, naked ladies, even a few amorphophallus bulbs in it. This patch was grass a few years ago. I cleared all the grass and added a lot of compost. I mulch heavily with organic mulches, mostly leaves. Throw a little 10-10-10 in once a year & that's it. if we don't have any rain for a couple of weeks, I may water if it's in the middle of summer and really hot. Mostly I just heave the bed alone, except for weeding. The amaryllis are usually planted after the flower stalk has died down, but there are still green leaves. I just plant them at the same level as they were growing, usually with the neck at ground level. I may sprinkle a little fertilizer if I have any on hand. The bed is in full sun, so that helps a lot.
A few years ago, I went crazy over all the cybister amaryllis, including papilio. I really love Chico and La Paz. My biggest problem with these is that, being so close to the sidewalk, the flowers tend to get picked by passerbys.
I do have a few bare spots in the bed, so twice a year I fill those spots in with annuals. Right now, I have pansies for the winter & early spring. I'm looking for a different annual for this summer/fall. Something low growing, can take the hot, humid New Orleans summers, and preferably in the pink/purple color family.