I still use the same mix in winter just a lot less and a lot less often. I would not change the properties of the fertilizer just the amount and frequency - seems to me it is by nature a more stable method. Just my opinion of course
Grimmy
wow! I guess you missed my point(s) a 150 pct. I pointed out the water soluble type I used earlier and mentioned in the second link they carry a lot of xx-xx-xx variations. Water soluble is just as effective and a hell of a lot less expensive. The reason I mentioned it is it seems to me 10.99 for a pint compared to water soluble of equal quality per pound equals big cash. I figured with as many plants as you have it would make sense and work fine is all...
Grimmy
I've been using this version of Dyna grow:
http://www.amazon.com/Dyna-Gro-Grow-7-9-5-Plant-1-Quart/dp/B0054YQ1WI/ref=sr_1_2?ie=UTF8&qid=1380048192&sr=8-2&keywords=dyna+gro
It has been working pretty well for me indoors and out at a rate of 1/2 TS per gallon. I've been using it every watering, for about 30 plants of varying sizes, and I still have about half a bottle left after 6 months. I'm not claiming to be an expert on fert, since it is one variable that I haven't tinkered with very much. The "foliage pro" that you posted might have a bit too much Nitrogen, relatively, but it may also be just fine. I recommend going with the larger size since it is likely more economical.
I've been using the DynaGro stuff for a couple of years. As mentioned above, it's very concentrated. I've used both "Bonsai Pro" version and the generic. The components listed on the labels look the same to me.
What caught my eye about the "Foliage Pro" is that the side says it's good for "Tropical foliage plants, perennials, and hydroculture." Interesting.