what to cover plants with for freeze
1 Where the leaves of tropical plants touch the plastic covers they will freeze. ( 2 This does not happen as much with fabric covers.) It's typical for the outer leaves to look burned. 3  But, rest assured, the cover protected the inner part of the plant. If freezes are forecast for several nights in a row, plants can stay covered with blankets or sheets for days without harm. 2  But eventually the covers will need to be removed so the plants can get light. 3  Where the leaves of tropical plants touch the plastic covers they will freeze.