Glad to welcome a fellow allium enthusiast. Old house does have the nice senecens montanum, but if you’re into the more costly rarities be sure to check out Odyssey bulbs. A ruinous catalog, walletwise, I try never to go.

As for the grow-through, yup, you’re right – it’s the one downside and alas it’s huge. Like the ratty daffodil foliage problem, but worse, since the ugly leaves are the frame for the flowers unless steps are taken. The artemesia sounds pretty, and hunky enough to hide the leaves. My favorites are astilbes, hardy geranium and spring-blooming anemonies.

Hostas are the classic, but you have to be careful with spacing or the hostas will shade the allium foliage before it dies and the alliums won’t be able to keep coming back.

Lynn – wow! – talk about proving how tough the bulgaricums can be…
If possible, wait till the clump goes dormant before moving it. The neighbors I mentioned to Rebecca are all possibilities, and I’ve had good luck with silver sage, too.

The bulgaricums are especially difficult to site because the clumps ( with luck!) tend to spread, so they have to have enough room in the sun. Consider annuals as a way of coping with the problem; you can grow them in a holding bed and then pop them in for leaf-hiding purposes when the time comes.