Thanks ElPolloDiablo!
I'm planting bulbs in this area for the first time. The weather factor makes sense to me as the shoots initially looked healthy when they first emerged, but we did have a couple of freezing temp days since then. I used to have some hostas around the area. I don't recall having draining issues, but I'll watch for pooling water when we have a heavy rain and will also spread some mulch to see if that helps.
I noticed your signature says you're in the Italian Alps foothills? I imagine it must be quite beautiful there.
Thanks again for your insight!