Been using canna for awile now and its pretty easy if you keep a few things on lock. PH very important. My tap ph rises on its own, so I ph everyday and avoid that problem. Check your runoff ph and ppm that"ll tell you if your " locking out". prob be way high or way low on ph??????
Temps are a issue this time of year, if they get too cold they wont eat = build ups or lockouts. Never let em get below 60! i run around 70 all the time!
Get yourself some drip clean from House and Gardens !!!!!! Shits so good to prevent lockout and build ups....
Finally water with plain water a couple days a week, plants dont need to be fed 24/7/365. The better you dial your feeding the more youll get out of the babies Less is more with canna!!
Canna coco A+B wasnt enough for me with tap water. I rocked 1/4 strength Cal-mag at first and then 1/2 strength. Everything got so nice and lush. You will need a PK booster in flowering. You also need to make sure your pH is spot on and not drifting outrageously. I wouldnt even fuck with coco without a proper pH monitor.
Im in flower about from 4-6 weeks. Just went out and got some drip clean, hoping this will clear it up.
If I use the drip clean and am sure its not salts, does that mean nothing is being locked out as long as ph and temps are ok? I'm just wondering if something is causing my mag to get locked out or possible potassium.
Here are some pics of one of them, most of the others are pretty much the same, but not quite as bad.