Don't remove the foliage until it has turned brown. The bulb needs the
nutrients produced by the foliage in order to bloom well next year. You can
plant perennials around the bulbs to help disguise the waning foliage, or
you can just ignore it as you go about other garden tasks. Before you know
it, it will be high summer, the foliage will be brown, and spring will be
just a memory.

Cheers,
Sue

Zone 6, Southcentral PA

"TomM in NY" wrote in message
...
After they flower, when should these be trimmed to the ground?
Thanks in advance,
tom