In general, they're almost foolproof. In fact, my aunt is in war with lycoris squamigera (the most common old fashioned one)..and since I'm starting to see seedlings appearing in the lawn, despite my efforts to deadhead, I'm beginning to agree with her.
Plant them, let the foliage grow, and leave them alone is the best recipe for success. They don't tolerate overly dry or overly wet, though dry is better than sopping wet.

They DO not like being transplanted and actually don't like dry storage (but tough they are).

Here, it doesn't matter how deep you plant them...they do fine with the neck barely buried or six inches down.

L. squamigera, locally known as Naked Ladies or Surprise Lilies, are common here and seem to grow in just about any conditions, except wet soil. I grow L. sprengeri which is so magnificent that blooms always take my breath away. I have taken bulbs from the original clump and dotted them around the gardens. To do this I just pry up the big clump a little bit with a spading fork, reach in and pull out a few bulbs, then lower everything back. The big clump doesn't seem to mind though the new plantings take a year or so. I move them when the foliage has just died back.

I dug some out and just threw them on top of shady soil covered with leaves, thinking that they would die. Nope, they are thriving; go figure. And some that I have purposely transplanted I just dig deep enough to cover the bulb and they always live for me.

I often hear people saying how foolproof they are. Yet since the ones I I transplanted from my mother's garden failed to live, they must not be as tolerant of all conditions as commonly thought.

Lycoris squamigera is what I THOUGHT they were. But all we ever called them was the common name.

The name on this package is Amaryllis Belladonna, though. Photo looks the same, though, as the one I'm familiar with.

A. belladonna isn't even hardy here (by the way). It is NOT a lycoris (obviously) and we're talking apples and oranges. We have gone down the rabbit hole with assumptions on common names, again.

Yeah. No more related to one another than I am to you.

I dunno, you could be a cousin :)

Well, we're both gardeners :)