For those of us using hydro in one form or another Canna has a free magazine you can get at your local grow shop called Canna Talk

http://www.cannagardening.com/downloads/140

I prefer to read the hard copy magazine than read it on line.

Hydro Girl at the Grow Room in Nyack NY gave me issue #24 which has interesting articles on plant nutrition and nutrient deficiency.

For our potted figs in 20 gallon pots next year I'm planning on using my Rich's Super Mega Mix and the Canna Terra products on their prescribed growth schedule.