PlantsinPants.... Yes, you can make the switch. Just give your soil a good flush (plain pH adjusted water - pH of 6), three times the volume of the pot. If in soil, just 5 gallons each. Your highly soluble chem ferts will wash out of the soil quite easily. The chems in plant tissue will work their way out over the course of a few weeks.
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The day after the flush, mix up a mild (NPK range like 2-1-1 to 4-3-2) higher N fertilizer tea, and give each plant two quarts of it. Follow that up by topdressing one cup of worm casting (or make a worm castings tea - then topdress the leftovers) to provide micro-life to get things going. (The higher N fertilizer tea helps establish the micro-life, then switching to bloom fertilizer teas later works better).
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These little micro-beasties (good bacteria & fungi) that come out of & along with the worm castings, will greatly improve things in the rootzone.
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In the meanwhile, read the thread " Making Tea is E-Z & Cheap " in this forum, to pick up info on fertilizer teas and their use.
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Hope this helps....
Keep it Real....Organic....
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