Newly planted this spring
It could be anthracnose, a fungal disease, or leaf spot. These are not usually severe and cleaning up the leaf drop is usually sufficient. Also, avoid overhead watering.
My barberry’s leaves dried all up, I think lack of watering, the leaves have not fallen off but they’re all shriveled. However when I cut the branches it’s still green inside, so it’s still alive. My question is will new leaves grow or do I have to prune the branches back?
They should fall off and regrow, but you can hurry it along by lightly pruning and cleaning it up.
How far out from the orange rocket barberry do the roots grow? I am planting mine near arbor vitae. I want to make sure the roots have enough room to grow with out them killing each other.
I looked up the specs on the plant and it grows about 1.5 feet wide so you can count on the roots being about that width. If your arborvitae is mature, I would space the Orange Rocket at least 2 feet from it.
I live in central New Mexico. I planted 2 barberry shrubs 6 weeks ago. They are in full sun for about 6 hours/day. The shrubs were doing well until 2-3 days ago and many of the leaves are wilted. We went from 100 degree weather to low 70's and then to mid 90 degree weather. The major temp change back to mid 90's has been in the last week. The shrubs are not on a drip line and I water them by hand. The first 2 weeks I watered them daily, and then transitioned to every other day. On extremely hot days I water them daily. They receive about 2 gallons of water with each watering.
I suspect they are getting too much water. Trim off the fried looking part and reduce watering but let the hose run slowly next to them so they will be watered deeply but less often. See if they can go three days without water to begin. Eventually once a week should be enough.
When plants are waterlogged, it damages the roots and they can't uptake water. Then the leaves look like they need water but it's because the roots can't deliver, not because the water isn't available.
When watering less often, but deeply, it encourages deep roots, which benefit the plant, especially in your climate.
Will not upload my photo…the leaf color is burgundy
Plants can change color due to weather, stress, or other environmental factors. Make sure it is getting fertilized in spring. It has low water needs so don't overdo on the water. It prefers full to part sun.
Oddly enough, when looking at images online of Orange Rocket, I saw a few photos that looked like yours and they were ads for a nursery! So the color changes could be normal.