In April and May, I planted dozens of trees, including 4 bald cypresses between 5.5 and 9 feet tall, and 2 dawn redwoods that are similar in size. We had no rain for weeks and hot drying winds out of the south. I watered frequently and heavily.
About 10 days ago, the needles on one bald cypress turned orange over night. Here are two photos of tree #1 (first victim):
The needles on the other cypresses had a slight orange cast, but were mainly green. Between Friday night and Saturday night, we had 6.5-7 inches of rain. When I checked the bald cypresses today, the needles on all trees are orange although not as dark as tree #1. Photo of largest tree:
What are the chances that these trees will survive?
Is this a survival mechanism that is similar to when tulip trees and oaks drop their leaves when stressed? If this is a survival mechanism, will the tree put out green needles or will the trees remain bare until next year?
When will I know that it's time to start over again?