Marianne's Response
Fertilizer ratio
I have Peter’s 15-5-15 fertilizer for my orchids but I can’t tell how much to add to one gallon of water
Posted by TARA BROWN on May 17, 2026
Marianne's Response
So sorry but the best advice I can give you is to read and follow the instructions on the label. I am not familiar with the dosage on the Peter's brand of fertilizer. I use Osmocote on my orchids following the recommended dosage on the package. Keep growing, Marianne Binetti
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