Auto Outdoor - Summer Sativa Grow

During Week 4 the plants grew well, but experienced some issues with yellowing of the older leaves. I finally sprang for a pH tester, and found that my soil was a bit salty, around the 7.5-7.8 range. This easily could have caused the yellowing, but then again, maybe not. To help rectify the pH (and to add a bit of nitrogen), I worked in some fresh used coffee grounds to the top layer of soil, then gave them a good water. Dropped the pH to the high 6's. I will test the soil again in a few days when its dry to see if there is a huge difference. Other than a bit of yellowing, these plants are doing pretty well in the hot weather. They started some leaf production at the base of the leaf stems. I expect in Week 5 to see the pre-flowers and some lateral growth. I've been brewing up a nutrient tea (compost, blood meal, honey, veggie scraps, and some fine wood chips) that I will add to their last watering of the week.