Blackberry in yard compost

It is growing and turning out just like the last Auto (northern lights) I did like this. The new cool tube I got is amazing I can put the plant much more near to the light and it's not slowing down the leafs don't really like it but as soon as I moved it 5in closer I saw faster bud growth. PPM is ranging from 700-1600. drain ppm is 200-300 watering 1.25g every 24hrs 20% runnoff. PH i feed is 5.8-6 and run off is around 6.4. I flushed with FloraKleen once. The way i have been doing flushing is: wait till watering time mix 75% nute strength wait 3 hours flush with 2 gals ro and FloraKleen. wait 3 more hours and feed with normal nutes. When i was just feeding RO I was getting cal-mag and N problems right after the flush. Doing it this way seams to have fix these problems. Biggest problem I had was not mixing the FloraNova enough you really have to shake this stuff for like 10mins I'm not kidding I think need a paint shaker for the sloppy batch I have. I dried about .4Grams it was fire already