so your saying to flush every other week
and to feed every other week?
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Selectz...... By watering one week then fertilizing the next, in a continual rotation. You are not really "flushing", like the hydro crowd does, so much as, you are allowing the plant to use what is present in the soil. Now to clearify that, let me say, I do not water every day for 7 days. I water once (a good soaking), then wait a week to fertilize. If the weather, is wicked hot, then I go back in 3 days and water again - but only when it's real hot.
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This prevents a build up of NPK in the soil, encourages root expansion and helps the micro-beasties (good bacteria & fungi).
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Micro-beasties can be couch potatoes too. If you are dropping them some easy to digest NPK every two or three days - they will not do their jobs. They will be just like teenagers, jacked up on Mtn Dew & Cupcakes. Too high on sugar to be useful.
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Their job is to break down the natural NPK present in the soil, making it more solube for Mary to take in through her rootball. Over application of ferts will kill them and in soil growing, the micro-beasties are very important to Mary. Without them, the soil just becomes a sponge that requires frequent doses of ferts to keep your plants alive.
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Hope this helps...
Keep it Real....& don't over water / over feed Mary - she does not like it.