Water excess and/or uneven watering are abiotic disorders caused by inadequate watering. Water excess may lead to rotting of the roots due to lack of oxygen and higher susceptibility to infection. Symptoms of over-watering include stunted slow growth, yellow and brown leaves, wilting and higher susceptibility to leaf burn.
How to Fix Overwatered Plants & Uneven Watering
Signs of damage
Leaves Go Yellow and Fall Off. Dropping Old and New Leaves Alike. Wilting, Limp Leaves. Leaves Turning Splotchy Black or Dark Brown. Mushy Roots Mean Overwatering. An Overwatered Succulent Will Rot and Turn Mushy.
How to prevent
Soaking the ground for a longer period of time less often, and not watering by hand but using a sprinkler or soaker hose, is the way to handle that situation. Mulch around the plant will also help keep a more even level of moisture.
Heal
Move your plant to a shady area even if it is a full-sun plant. Remove any dead or dying leaves. These should be easily recognizable. Check your pot for proper drainage and, if possible, create additional air space around the roots. This will allow oxygen to reach the root zone. Remove any dead or dying roots and keep only the roots that are healthy. Water only when the soil is dry to the touch, but do not let it get too dry. You should also seize all fertilization at this point until the plant is healthy again. Treat with a fungicide.
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