I have four plants a month into flowering. One of them, a pineapple express has some of its leaves curling and turning yellow but only on one side. It doesn't seem to be a pattern of which side of the leaf is doing this but the rest of the leaf and the buds still look perfect. The leaves are also laying flat and not curling up or down, just to a side. Any ideas? I am a new grower but I cannot find an example of this anywhere I look.