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I've planted many of my container flowers in Schultz Plus Potting Mix, which is supposed to feed them (well?) for several months. How do i know when the nutrients are about to be exhausted?
The other plants are in several different media recipes (including the pine bark recipe from Tapla which I'm still struggling to put together) and probably need some feeding about now. Hwo do I know when a plant needs to be fed?
Is going by the N-P-K the best guide for choosing a fertilizer for container plants and is there one or two configurations that are best for at least most of my plants?
I'd like not to have to buy more ingredients. I already have on hand: Miracle-Grow (all-purpose ); Pennington All Purpose 6-10-10; Espona Tomato Tone 4-7-10; Schultz All Purpose Slow Release 16-12-12; and SuperPhosphate 0-46-0. The TomatoTone and TriplePhosphate are about two years old but an email response from the maker says that as long as it was stored dry, it's fine (true?).
I've got Dahlias (from seed), Zinneas, Hollyhocks, Strawflowers, Impatiens, (Echinacea (Coneflowers), and Nasturtiums. I also have a few cucumbers, Scarlet Runner Beans, Poblano peppers and herbs.
Thanks in advance for information and advice.
Michaelangelo, The Greenhouse Idiot
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