Just got here but wanted to say that I have grown outside in the foothills (must be pretty close to you Trunks as I am between Swagby and ash.) and have had no problems as I always use soil amendments (perlite, vermiculite, sphagnum moss, and mix in my organics) I use 50% soil from the area I intend to grow in 15% perlite, 15% vermiculite, and 20% sphagnum moss. I usually start my beds in January so that they can winter over and the nutes will have time to break down. I also start my clones indo a few months before I intend to plant (usually the first of June) so when it comes time to plant the clones have vegged enough to have a good root system.