Bougainvillea is a brightly - color vine that is often coach to grow along pergolas , fences , trellises or wall . This thorny vine gets its color from the bracts that surround small clusters of white efflorescence . bract may be Battle of Magenta , purple , yellow or white . In warmer climates , the blooms may provide color all class . Bougainvillea are traditionally roll in the hay as tender - weather plant life . They thrive in U.S. Department of Agriculture Plant Hardiness zones 8 and above , and in general , can not hold up icing or freezing temperatures . If you are growing bougainvillea in a dusty region , plant it close to a dwelling or on a down slope to reduce the risk of freeze . If Robert Frost threatens , cover the plant life to protect it . Younger plants are more susceptible to frost wrong than ripe plant .

Singed or Burned Leaves

If bougainvillea is subject to a light frost , it may go but leaves and bracts will appear burned around the edges . If your bougainvillea survives a frost with singed leaves , it is not necessary to murder them , as they will eventually go down off . Bougainvillea regrow quickly – as long as they are not subjected to extra freeze – and the singed or burn leaf and bract will be replaced by novel emergence .

Leaf Drop

Within a day after a hard freeze , the leaves of the plant may drop . If they do , this is not an denotation that the plant is numb . Prune the plant life back to about 6 inches from the ground and keep it quick . New growth may seem within a few weeks of warmer temperatures .

Root Freeze

Whether the leaves come down off your bougainvillea or seem burned after a Robert Frost , the plant may have freeze and die . Frost and prolonged freezing temperatures may stop dead the root and kill the industrial plant , as it can not get wet . If you prune the plant and novel emergence does not appear within a few week , it is likely dead . Dig up the plant and dispose of it .

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