I have the same problem in Northern California, following a very cold snap last winter. Now (mid-June) I am seeing little green shoots on some of the stems and trunk (the plants are 25 years old and 20-35 feet in height). I considered cutting them back to the ground, but now believe that cutting each stem just above a good looking sprout (maybe 1/2") will save the bulk of the plants. Of course, considerable loss of height will be the price to pay initially, but they'll probably grow back healthier than ever. Not counting on any flowers this summer, however.
Apr 07, 2011 Rating
What should I do About Frost damage On My Oleanders by: Beth
I live in Myrtle Beach and just purchased a house that has numerous Oleanders that all appear to have frost damage. They are still alive but all the leaves are brown. Should I prune them down to the ground or leave them alone. The leaves have not dropped off and I have not noticed any new leaves growing. Thanks!
Jan 24, 2010 Rating
Olander plant killed by frost? by: Steve
Hello there.
I would not write off the plant just yet. Here is what do to determine if you oleander has been killed by frost.
First thing you want to look at is the plant stems. If the plant is still alive they should be bendable yet firm. You can also cut into a stem or trim off some bark, looking for green color inside.
Again looking at stems, if they are flattened, mushy, or brittle the plant may be dead. To confirm look at the roots. If they are squishy or brittle it is not a good sign your oleander survived.
Hope this helps
Steve from http://www.different-kinds-of-plants.com.
