Do you supplement potting soil with another fertilizer? - Knowledgebase Question

Staten Island, NY (Zone 6B)
Question by gwengq71
May 20, 2007
I know the potting soil bags say they will feed flowers for three months. I was going to supplement once every week or two with a water soluble fertilizer in addition. Is this too much? My flowers are in containers.


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Answer from NGA
May 20, 2007

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In theory, the fertilizer in the potting soil should be sufficient for the first three months. However, if your plants look like they need more then go ahead and use a water soluble as well. When you water frequently or if there is a lot of rain the fertilizer in the mix can be leached out faster than three months, and certain plants do need a richer soil as well. Let your plants be your guide. (You do not want to overfertilze as this can cause weak, overly lush growth that can encourage insect pests.)

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