Perhaps environmental? Too cold? Too wet?
Also some kinds tend to roll leaves more than others.

1st, please stop watering at regular intervals. 2nd, check your plants daily and learn to recognize their needs. A daily walk in the garden is so Zen!! 3rd, submit pics so I can see them, I love looking at other peoples gardens, gives me great inspiration and ideas!!! 4th, stick your finger in the dirt up to your second knuckle. Hard dirt is dry dirt provided you have my kind of soil. Also your dirt should be moist not wet and should be mulched heavily to reduce evaporation!!