First feed with bloom nutes 15-30-15, mixed <1/4 tsp for three quarts of tap water that set out for 24 hrs. Fed 4 cups with the run off in the pie pan pic. Last water was 6/13. Pot is 8". Do I feed every watering?
No, feed every other watering when maximum growth is desired. In an emergency, if they need something, it'll be ok to double up on any ferts they still need.
in soil, feed once a week. water between feeds, with properly ph'd plain water. when starting nutes, it's a good idea to begin with 1/4 strength. i grow in coco, and start at about 250-350 ppm. even when i was in soil, i allowed for a good 10-15% run-off. this eliminates the need for a weekly/bi-weekly flush. in soil, a lot of folks do a feed, feed, flush schedule.