I have rosemary plants in pots; they are turning brown. I water every evening and they get the afternoon sun. It has been very hot in Arizona, the temps are over 100 degrees. What is going wrong?
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The following articles also should be of some help to you: https://www.gardeningknowhow.com/houseplants/hpgen/how-to-water-a-plant.htm
What size are your pots? If these are in small pots, they will dry out in a matter of a few hours. AZ is like Texas - just blamed hot and rainless. If in small pots, I would transplant into larger pots and try to water twice a day until they are well established. It is probably just stressed since rosemary is tough.