These plants are 20 days old growing indoors with floresent lights and placed outside during daylight hours. Getting 18 hours under lights...then the rest of the time outdoors. really no dark time. Noticed slight yellowing on two plants. Could be too much nutrients. have been using low dose FloraNova grow randomly approx three times over 20 days. Have been light watering every day since top of soil in 2 gallon buckets seems dry. Any thoughts of yellowing. Also how oftern should I add nutrients and is it OK to place outside in addition to 18 hours under the lights. First gro...plants do look good overall. Growing BC Pinewarp.