Aeroponic Grow with Auto-Flowers

This week I decided to give the babies some real sunlight, since it's "God's grow light and is infinitesimally more powerful than artificial light". But since it's still pretty hot in the afternoons (90+°F), I only put them out until midday and bring them back in. A couple of days I left them out longer because they seemed to love it and I felt bad bringing them in on such nice days. I am afraid my last grow was slightly stunted because of extreme heat so I'm trying to be cautious. They seemed to really like being outside though! I also started adding some mineral solution to the spray water. I added 3/4 tsp mineral B and 1/2 tsp mineral A to 1 1/2 cup of water in the spray bottle. Mineral B is 2-0-0 and mineral A is 0-1-3. I figured the babies need more potassium and phosphorus right now during the veg period. Since it is so dry here, I added a humidifier close to them while they're inside under the grow light. I try to keep it around 70% RH. They seem to be doing pretty good so far. I do see a difference between my babies growing in rockwool vs what I've seen from others growing in soil. Mine are smaller and kind of fragile-ish/skinny compared to the soil-grown seedlings. The last plants I grew ended up being kind of small with decent yields - pretty high potency - from everyone that has smoked it has said - however, I am hoping for bigger plants this time with bigger yields while maintaining/increasing the potency. We shall see.