Posted 2/23/2021 15:22 (#8853405 - in reply to #8853090) Subject: RE: frost depth
Wisconsin
The frost usually keeps going deeper even when the tulips are blooming on top. The ground can't tell how warm it is on the surface, only thing that matters is how cold the ground is immediately above it.
If I'm understanding that, that's a test spot with the ground kept bare?
frost depth
