What's going on with these leaves?

MarijuanaMiyagi, I am using FoxFarm, and the schedule calls for a flush every four weeks or so. I am using cococoir which apparently needs to be flushed to wash the excess salts. My ph on everything is about 7. I tried lowering it, but didn't have any luck. I've had to water the plants daily now since it gets very hot in Southern California, and usually by the middle of the day, the pots have lost much of the moisture.

Why are you flushing at this point? Did you have a nutrient lockout? When I water I use 10-12 liters of water in my 5 gallon fabric pots. I will pour in a little over a liter ar a time giving 5-7 minutes for that to soak down in. It is usually just enough to fully soak pot while giving me about a liter of runoff. Never have issues with salt buildup, nutrient lockouts, etc. Just make sure your 6.5 ph and proper levels of feed for each week of flower.

Progressive potassium deficiency. Nitrogen level is too high in flowering