What can you do after hibiscus plant has frost damage?

Do not cut it back! You can just leave it alone and it will take care of itself.

The leaves will sag and dry up and if it is too unattractive just pull the damaged leaves off. It want hurt because there is a "guard bud" at each leaf that will come out in the spring.

If in the case the frost was more a freeze the tips of the limbs will not bud out and actually will die back a bit.

In late March nip these dead tips off--it is a self pruning technique by the plant if hit with severe cold. By nipping the tips off the plant will sprout out a little more attractive.
What can you do after hibiscus plant has frost damage?
I wouldn't cut on it now, but I certainly would after the last frost date. Pruning always makes a plant perk up, look better and you have plenty of time for it to bloom again. I use hibiscus fertilizer which you have to be careful with in the spring....spread lightly aways from the main stem or stems after you have watered thoroughly. It is 48 tonight and when the weather perks up again, it blooms right away one more time. I am in zone 9.
Reply:trim the frost damage off the tree
Reply:I believe it will be fine in the spring and the frost damage isn't permanent. You could cut it back.
Reply:In climates where freezes are common, growers will keep all or most of their plants in pots so they can be brought inside - there is a page at this site devoted to this. Another advantage of potted plants is that they can be lain on their side and are, therefore, easier to cover and protect when left outside. Tropical hibiscus can only withstand freezing temperatures for a brief time before there is damage. In milder climates (USDA zones 9%26amp;10), if you can trap sufficient ground heat by covering your plants, you may be able to prevent freeze damage to plants in the ground.
Reply:NO NO, do Not trim it now, MULCH in winter, TRIM in spring.

Anu..

I live in zone 5, hibiscus bushes have lived, PLANTED in my yard for 10 years or more.

In pots you have to bring them in or the roots might freeze.

the key is....

MULCH MULCH MULCH.. dead leaves will do.