If everyone is already in their pots, you can still use the Nutricote, but what you do is a subsurface incorporation. You do this by gently roughing up the top 1/2 to 1 inch of the soil, spinkling in your Nutricote, then cover over and water in. You can do the same with the Organic Choice, but you will need to do it more often than once a season, I'd think. I've never tried the Organic Choice so I can't relate from actual experience.
Whenever I'm doing a liquid feed, I always make sure the soil media is already moistened - liquid feeding into a pot of dry soil is NOT recommended! Another trick I use is what I call "hot fertilization". "Hot" doesn't refer to the strength of the fert, but to the temperature of the water used to mix the soluble fert in. You see, dark colored water-filled hoses left in the sun will make pretty warm to hot water, and I suspect most people would just let the hose run until the hot water turns to cool water before watering plants. Instead of wasting it, I decant the hot water into a 5 gallon bucket and mix my Miracle Gro in that very warm water. So long as you can put your hand in it without actual pain, it seems to be OK. By the time it gets into the soil, it is not as hot, but it is still much warmer than putting cool hose water on the plants. The warm solution seems to stimulate the roots, especially with the fert there too. It may even discourage pathogens that prefer a cooler soil environment.
Caladiums tend to prefer soil on the acid side, so I keep the Miracle Gro for acid-loving plants handy and mix half and half regular and acid loving (1/2 tsp of each) to the 5 gallons. With such a mild solution you can use it as often as 5 days a week. If you also have Nutricote in there, get ready for some serious growth - this is a professional production regime used by nurseries to get maximum growth in minimum time.
Oh, I also use SuperThrive in my fert solution.
