That is exactly what I do! Smaller amounts of nutrients every feeding. The BLG feeding schedule for Canna is designed around this idea. I believe people are almost always over fertilizing and the reason you so a lot of growers with salt build ups on their fabric pots. They are feeding so much fertilizer that the plants can't uptake the nutrients and it just gets washed into the fabric on the next watering. Salts buildup on pots also causes PH issues and breathing issues.