1st Grow

All plants are now in flower but seems to be happening very slowly. One is forming chunky heads but not many of them. I noticed all pots now have a white substance which research tells me is salts on the outside of the pot so have started a major flush and am cleaning off the excess salts off of the outside of the pots. Could be the reason for slow growth. It's a ton of work flushing properly using 24 litres per pot of ph'd water then an extra flush with 3 litres of nutrients to replace what's washed out. I still don't know what to expect, there is nothing here that is making me go wow! I research daily and found a technique called the 4 inch rule. Guy uses 4 inch rock wool cubes to start his plants and removes the plastic, he only waters around the edges of the rock wool and the roots air prune as they grow, the end result is a massive root ball, so when he puts the rock wool cube into the pot it already has a big healthy root ball. I'm going to give that a go after my next grow. I've already started my next grow to get a head start for when this one finishes. I reckon I've still got a good month or more before this on is finished. Days here are becoming hotter and the air con in the grow room struggles to keep the temps down. Room has got up to 95 during the day but the temps around the plants are cooler than that I have to have the air con blowing on the plants to have any cooling effect. On the 95 degree days I have it blowing on the actual pots to keep the root temps down which I believe is more important than the actual plant.