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Container Gardening

When do I add NPK and how much?

11 years ago

Im really confused about the whole NPK and was hoping you guys could help. Ive been taking in some information around the web and from what ive gathered nitrogen is for foliage; that you should only feed your plants during a certain stage. Before it fruits or something like that? Phosphorus is for stronger roots and disease resistance . Potassium also helps with diseases and moisture? Is some of my information correct or detailed enough? Please share your advice.

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Comments (2)

gardengal48 (PNW Z8/9)
11 years ago
First, what is it you are thinking of fertilizing? Different plants need fertilizer at different times and in different doses.
greenman28 NorCal 7b/8a
11 years ago
No, that's overly simplified to the point of inaccuracy.

Plants use all nutrients throughout the growth, bloom, and fruit cycle.

There are growers who reduce nutrients to achieve a certain effect - earlier harvest, for example, among northern growers with a short season. Then, of course, you have the cannabis growers who aim to harvest within a very specific time-period.

Josh
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