Frank wrote:
Brooklyn1 wrote:
"Nothome" wrote:

We live in zone 5. We had a small parch of asparagus that produced
well, but we wanted more, so we planted a row of roots last year. All
came up, but the spears were thin, as one would expect from new plants.
Last winter was exceptionally cold. When I went out to the garden this
year, only two plants had produced small spears by the end of May; one
was the original patch, and one was from one of the new plants. This
morning the original parch has thrown up a second spear.
I'm thinking I'll wait a couple more weeks, then conclude that the
plants that have not produced are kaput.
How long should I wait before digging up the corpses and replanting.

Zone 5, especially in the north east, was exceptionally cold this
winter. Your plants may be late.

Very bad year for winter kill. My hydrangeas and butterfly bushes
looked dead but are recovering but I did lose my rhododendron.
Took much longer before the first two started showing life.

I don't know your location but I'm in the northern Catskills, many
times the temps were -20ºF. About half of a pansy redbud is kaput,
same with an American beech... too much snow and slow melt didn't help
either... I dug out two young blue spruce today that didn't survive
drowning, my bad for planting them in a low spot. Every year I lose
something due to weather. Winters here can be brutal. Gardening
everywhere is a challenge.