How big are your pots?
Let them get dry. I like having a 1 inch hole in the side down at the bottom to stick my finger in and see how damp it is. If they don't get oxygen to the roots the roots will rot or die.
I didn't have much luck with the Canna line of nutrients.
killerweed420 Reviewed by killerweed420 on . HELP PLEASE PLANTS ILL NEED ADVICE OR INFO :( HI ALL IM DOING A BLUE CHEESE AND 4 SEEDS OF (AUTO WHITE RUSSIAN) WELL THEY ALL STARTED OK AT THE BEGINING BUT SLOWERLY STARTED GETTING YELLOWING FROM THE CENTER OF THE LEAFS OUTWARDS THEN THE LEAFS DROPPING OFF AND THERE TAKING LIKE 3 OR 4 DAYS TO FEED AND SEEM TO HAVE SLOWED RIGHT DOWN GROWING AND THERE IS LIKE 1 INCH OF THE BOTTOM OF THE POT THAT STAYS DAMP (SOIL) ANY HELP PLEASE PEOPLE ?? TEMP- 75o AND 60o WHEN OFF SEEDS ON 18HR LIGHT 2X -600W DUTCH BARN LIGHTS HUMIDETY- ABOUT 52% Rating: 5