The first thing many gardeners want to do after a freeze is to start whacking everything back.

Only plants in pots that can be moved into a greenhouse or a brightly lit location indoors would be expected to go through the winter in excellent shape.If you moved a container plant indoors for the freeze, take it back outside once temperatures warm up.

A prolonged freeze will kill it.May survive a dip to the mid-20s, but it's best to protect it during freezing weather.Should top growth be damaged during a freeze, leave all or at least a good deal of dead wood until we're out of the danger of frost. https://www.chron.com/life/gardening/article/Plant-by-plant-freeze-information-1766802.php Photo: Douglas Freer, / Fotolia.com (This does not happen as much with fabric covers.)

But eventually the covers will need to be removed so the plants can get light.Where the leaves of tropical plants touch the plastic covers they will freeze.

Although you may see a fair amount of damage to landscape tropicals, particularly on the north shore, most of the tropicals are still alive and will appreciate protection as needed through the rest of the winter

Once there's no danger of a freeze, prune down to the firm, green area of each stem or branch.Will suffer top damage but returns from mulched roots in the spring.Many shrubs will withstand freezing temperatures, and unless temperatures are expected to drop into the low 20s or teens, few cover these shrubs.Some gardeners cover azaleas, especially when in bloom, during a hard freeze. Prune back until you reach the green area.

Our growing area covers Zones 8b/9a.Lantana is usually root-hardy and will pull through a cold snap. Impatiens, waxleaf begonias, crotons, zinnias Will suffer considerable top damage, and with sustained below-freezing temperatures, they'll die. A dead trunk will look brown, feel mushy, loose in the soil and will bleed a lot if punctured.Generally, it's a good idea to delay hard pruning of woody tropical plants, such as hibiscus, tibouchina, angel trumpet, croton, ixora, schefflera, copper plant and rubber tree, until new growth begins in the spring, and you can more accurately determine which parts are alive and which are dead. A 4-inch layer of mulch over the ground is all that is needed to protect them.You may remove the damaged foliage from banana trees but do not cut back the trunks unless you can tell for sure they have been killed (usually this takes temperatures in the teens). Mulch helps.Crotons can be pretty tender, and a prolonged freeze will usually do them in.It's an annual since it's not root-hardy in a hard freeze, but many return year after year.

Photo: Douglas Freer, / Fotolia.com For more severe freezes, minimize damage by providing heat under the cover with small, incandescent outdoor Christmas lights.We have been experiencing cold weather unusually early this year. A tomato cage works well, or pick three stakes slightly taller than the plant and drive them into the ground around it before you cover it.Remember, covers usually work well to protect plants from radiational freezes on chilly, clear nights or when temperatures will not go below the mid- to upper 20s.

Make a point of bringing the plant indoors in future freezes.Don't be overly distressed if a tropical plant you carefully covered shows damage. Try scratching the bark with your thumbnail.

You do not need to completely remove the cover if it will freeze again the next night.If freezes are forecast for several nights in a row, plants can stay covered with blankets or sheets for days without harm. Photo: Douglas Freer, / Fotolia.com

Blooms suffer some damage in the 20s, but the plants generally survive.Will suffer considerable top damage, and with sustained below-freezing temperatures, they'll die. Cold protection will preserve the life of an in-ground tropical plant -- but not bring it through winter unharmed. And the cool season is just getting started.At this point it's time to assess the effects of recent freezes and evaluate whether the steps you took to protect your plants helped minimize damage.Learn from experience, for example, if you left a potted plant outside, and it sustained cold damage. Dead leaves can be picked off to make things look neater.If you can clearly determine what branches on a woody plant are dead, prune them back. How to Revive a Plant After Leaving It in the Cold.

However, if the damaged tissue is oozy, mushy, slimy and foul smelling, it should be removed.Many of these plants have fleshy, below-ground parts, such as bulbs or rhizomes, which will survive the winter and grow next year.

Start at the top and work your way down to see how far back the plant was killed.Don't get discouraged at this point. Cold temperatures enhance the color in ornamental kale and cabbage.Wait until there's no danger of frost to prune these damaged shrubs. It should return from the roots in spring.Often called the flamboyant tree, it is usually listed as cold-hardy only as far north as Zone 10.

Spread begonia clumps on newspaper and leave this in a sunny area until thoroughly dry — about a week. In Zone 8, low temperatures can drop between 10 and 20 degrees. At 32 degrees, damage to the growing points will occur; below 25 degrees, severe freeze damage occurs.Skyflower (Thunbergia grandiflora) will freeze to the ground during a cold winter, so mulch to protect roots. Leave your plant in the comment area below, or e-mail HoustonGardening@chron.com. Do not prune anything for a week. Begonias for the garden have different cultivation needs so the notes below will help guide you to success.

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