Leaves become brittle when they have too much water. That part of the lawn gets plenty of sun, almost all day, but it's at the lower end of the lot and has a lot of clay in the soil. Water your crepe myrtle 1-5 times a week. However, once established, it is quite drought-tolerant and will subsist on a deep watering -- to a depth of 6 inches or so -- once or twice per month. I myself never water my 30'tall crepes and have good success with them. Too much water or fertilizer can cause foliage growth at the expense of bloom production. Ward off occasional invaders by spraying them with a mild insecticidal soap. They will more than likely still be green, but they will easily break apart when you touch them. Water Requirements Crepe myrtle likes a medium amount of water and prefers consistently moist soils where it can get it. Here’s how to fix an overwatered tree: Stop. They are unlikely to produce blooms in the shade. It had lots of water at the nursery, and you deeply watered it when it arrived, then suddenly it was getting a sprinkling. Use well-draining soil. Trimming too much growth at once can weaken the tree and leave it susceptible to damage and disease. A crape myrtle’s roots may spread out a considerable distance; however, they are relatively weak and not aggressive. They do not produce heavy side roots that would cause damage to walkways, driveways, or foundations. Perhaps there has been too much watering, fertilizing, etc. Keep deep watering your crepe myrtle. Well-draining soil prevents the plant from getting too much water, while also keeping pests at bay. It is possible for a crepe myrtle to get too much water? Go ahead and give it a good drink, perhaps twice a week, depending on the heat and amount of wind you have. Gardening Know How recommends using soil with a pH between 5.0 and 6.5. 3) Are the roots of a crepe myrtle invasive? Keep an eye out for harmful pests. I can not find any issue that matches this description. If you are watering too much, these young leaves are lighter in color, usually either yellow or very light green. Mulch the soil to discourage weeds and preserve moisture. Landscaping can be very therapeutic for some, but stressful for others. Besides established leaves, look at new leaves. I will say that i think Crepe Myrtles are generally very resillient trees. Amendments should go on the surface of the soil around the tree, but paver sand should not be used for planting. We have gotten over 30 straight days of rain and now the crepe myrtle looks weird. 5. So, your tree roots are getting too much water and not enough oxygen. Crepe myrtles are a favorite of common garden pests like aphids and Japanese beetles. The crepe myrtle in our front flower bed has done fairly well until now. Too few nutrients or too much fertilizer can also explain why your crepe myrtle isn’t full of flowers. Crepe myrtle roots travel far and wide, spreading three times the width of the canopy. My first hunch is that is was getting too much water. Stagnant water is when you allow water to puddle up around the base of the tree for long periods of time. If left unattended, the fungus can severely damage your Crepe Myrtle. Crepe myrtle plants thrive in sunlight. The lawn there doesn't need much watering because the soil stays damp longer than the backyard. Are crape myrtle roots invasive? That’s a double whammy that could lead to root rot, fungi or long-term tree stress. That excess water commandeers spots air pockets previously held. How much water does a crepe myrtle tree need? If the soil is soggy, we recommend establishing a plan to encourage proper drainage around the tree. This situation makes it difficult to avoid having too much or too little water around the plant's roots. I would suggest giving it a little more tough love and see if it responds. 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