Q.do barberry plants need a lot of water
They were planted about a month ago.

Downtoearthdigs
Answered on July 29, 2015
New plantings need daily water for the first 2 weeks, even twice a day if the temperatures are above 85 degrees.
Then you can cut back a bit. You need to be very vigil for new plantings this time of the year.
Adding 2 to 3 inches of hardwood mulch will help with moisture retention.
https://www.gardeningknowhow.com/ornamental/shrubs/barberry/barberry-shrub-care-tips.htm
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