Answer: Without knowing what soil type you have, it's difficult for me to determine whether watering for 8 minutes is enough or too much. Most trees and shrubs will be happy with one deep soaking a week (about 1-inch of water). Watering more frequently can suffocate the roots. I'd scrape out a few inches of soil beneath each plant to form a watering well or watering basin. Then, fill the basin with water, allow to drain, then fill a second time. Once each week is all your shrubs should need. Watering in this way concentrates the moisture over the rootmass and allows it to trickle down and wet the entire root mass. The wilting can be a result of too much or too little water, or hot reflected sunshine. Once the roots are established (usually a few months), the plants should perk up. Best wishes with your landscape!
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