Athosanswered grow question 6 years ago See how the leaves look puffy between the veins? that's a sure sign of over watering; also, it's not so much leaves curling under, as in droopy leaves, which is another sign of over watering. Perhaps you are confusing the symptoms of over watering with under watering and watering again when you shouldn't, both will have droopy leaves, but while under watering will have dried up leathery leaves, over watering will have puffy leaves. The leaves look droopy when over watering, because the roots can't take oxygen and the plant is literally drowning. Let the soil get dry, half a gallon of water per day is too much.