I've been using this in my vege garden, and for my plants sometimes when needed.
http://www.jrpeters.com/products_/16491/19322-jack-s/19712-5-12-26-hydroponic---part-a.html
Really need to use it together with the 15-5-15 Calcium + Magnesium LX or similar.
http://www.jrpeters.com/products_/1...onal/16320-15-5-15-calcium--magnesium-lx.html
"Jack's 15-5-15 is a staple in many grower's fertilizer tool box. This is a truly comprehensive fertilizer with all the macro and micro nutrients in one tank. It can be mixed with other fertilizers in the Jack's LX line, which gives this formula a lot of flexibility.
"It contains 4% calcium and 2% magnesium (making it an ideal choice for water low in those nutrients), 80% nitrate nitrogen, and micro nutrients. Ideal for times when growing conditions are less than ideal or a grower is trying to hold plants at a particular stage of growth.
"Potentially basic, this formula will cause the pH in the root zone to rise over time, making this formula ideal for water types that are very pure or low in water alkalinity levels."
"I first used the 5-12-26 alone, but my veges were a mess because no Ca / Mg.
This would be even more of a problem with Canna.
Or something else with high Ca / Mg and micros.
Right now, my lettuces are doing amazing, harvesting enough for a meal every day or two in a small DWC unit.