First Auto grow

I’ve noticed some deficiencies on some of the plants but I’m unsure what is causing it so I flushed them. The buds are still forming quite nicely and have started to fatten up, especially the blue dream, almost getting to the size of a coke can. Recently gotten a heater since it’s winter here and I reckon that’s definitely helped the plants. Once again the smells are amazing from these plants, can’t wait to smoke them up!