Winter Harvest Handbook
Yup, 24.6 F this morning, first hard freeze this fall, PA Zone 5B, so the official growing season is over.
Under the low hoop house tunnel it is 28.9 F. Spinach has
frosty leaves and mesclun we planted a few weeks back is coming up.
I received
Elliott Colemans Winter Harvest book and it's excellent reading for hoop house growing.