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?

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