I'm struggling with my yellow pepper plants and now cucumbers too. The peppers turned green and big recently, but have not yet begun to yellow. In the last few days I've had 3 of the green peppers (yet to yellow) begin to what looks like rot on the top side (facing the sun). They look a bit wrinkled and are a tan color. The rest of the pepper still looks great. As of this morning I discovered 2 cucumbers with the same condition - tan and wrinkled on the side facing the sun, OK on the rest of the plant. Any idea why this is happening and what I should do?