Answer: Dull color on the foliage can indicate cold damage, or it can indicate a root problem. If your plants were looking healthy and were putting on new growth after you planted them, I suspect the affected foliage was nipped by frost. Check the plants to see where the off-colored foliage is most concentrated. If it is mainly on the tips of the branches but not on the interior foliage, it's probably cold damage. If the off-color is also on the interior foliage, there's a problem with the roots - either too much or too little water. Try watering deeply before the ground freezes, then watering deeply once each week during the spring and summer months. Hope this information is helpful!
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