Hardiness variablesrate of thawing
from target freezing temperatures
- 28,23,16,12,7 °F (-2,-5,-9,-11,-14 °C)
rapid thaw--direct to 40°F greenhouse
slow thaw--allow soil to return to 28°F (-2 °C) then to greenhouse
3 Tiarella, 2 Geranium cvs.
often rapid thaw had better growth, or no difference (Bruce)
- less time at low temperatures?