Rainwater

[tumbleweed]

Hello everyone! Recently I collected some rainwater for orchid watering. Would this replace my regular fertilizing due to the high nitrogen content in the water? I just don't want to over fertilize thanks!
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[Dazed]

I'm guessing a low nitro fert would work, cause the other minerals and such would still be needed. Mind you I'm guessing here, I'd like to see the more experienced members' input on this as well.

Oh... if I haven't welcomed you before, my bad. Welcome to The Orchid Obsessed & Proud of It Club.

[Halloamey]

I think you have some misconception. Rainwater is not rich in Nitrogen, it can have some amounts of dissolved substances considering your local atmosphere and collection technique, but not so much so that it can account for fertilizers.

[jai_star]

I agree as always a very weak solution of fertilizer dissolved in tepid water and water the orchids. I use water from the dehumifier from out laundry room

[Dorsetman]

If you want to be scientific about it, you need to consider the fertilizer you are using. Some are formulated for tap water - which more or less all over the world contains all the calcium and magnesium orchids need , so the fert' will contain everyhing else. But there is no Ca or Mg in rainwater - or water coming from a Reverse Osmosis plant, in which case you need a fertiliser formulated for that . Some of the ones specifically formulated for hydroponics assume that very pure water will be used ( rainwater or RO water) but general fertilisers intended for general garden use , assume tap water ( or well water, or river water - all of which have the Calcium and Mag you need .

[tumbleweed]

Thanks everyone for your advice! Glad I decided to ask the orchid experts
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