The actual fertilizers in both are soluble, but the FP application is entirely available immediately while the Osmocote prills 'dispense' the fertilizer in small doses every time you water. Delivery is primarily based on temperature. MG markets several soluble products for use on lawns & gardens, so the FP would be no different insofar as the way it works.

Al

Okay. I usually use Osmocote in place of watering with nutrients. When replenishing Osmocote, should it be mixed into the top inch of soil, in the gritty mix?

If you can Afford Foliage Pro in huge quantities,then why not? I just use any good MG product, shultz, Holly or Plant tone..Iuse the synthetics hooked up to a hose end sprayer that is very easy, or organics in my soil outdoors..It is a heck of a lot cheaper..Seems to me that plants inground get plenty of all the minor elements and nutrients needed just naturally...

I save the more expensive FP for all my container plants except for perennials and annuals..

Mike..:-)

I prefer to incorporate the CRFs because they are temperature activated and a direct sun load causes them to release more nutrients (so they don't last as long and delivery is a little more erratic).

Al

I, too, incorporate the Osmocote into my mixes, but I also use Foliage Pro.
In particular, I've been using Foliage Pro on trees that I've re-potted this season:
Buckeye, Citrus, Japanese Maples, Oaks, and Cryptomeria. I also gave my outdoor potted
ferns and my Horsetail Rushes a dose, just to see how they react. In the past, I've only
used Alaska Fish Emulsion on my larger outdoor plants.

Josh

Josh - wouldn't fish emulsion stimulate microbial activity?

I hope so! ;)
In larger containers, where temperature is regulated by the soil-volume,
I think the organic activity has a chance to get a foot-hold and do some good...
especially in the containers that sit on the ground.

Josh