Which Greenpoint strains have you run outdoors?
You could try foliar spraying with a little bit of baking soda in water to help prevent disease from the rain. I haven't tried that yet, but have seen it done with tomato plants on a forum. Maybe, you can even mix that with a little spinosad or BT too for the bugs & a small amount of potassium silicate, or whatever to boost the plant's imunity. I bet doing that like once a week, or something up until like 3 weeks before planned harvest (to allow spinosad or BT to breakdown), would help it pretty nicely.