Is hot/warm water better for plants? (dubvee.org)

submitted 1 week ago by MeatCat@dubvee.org to c/houseplants@mander.xyz

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When I have to run the hot water before starting the dishwasher I usually catch it in a pitcher and use it to water the plants and that got me wondering.

Not because of the temperature but because the hot water has more dissolved minerals in it (yes I am aware this means my tank probably needs flushed; it's on the better half's honey-do list).

I guess now I am curious if water closer to room temperature is better for them too since it would be less of a shock.

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[-] Cheradenine@sh.itjust.works 9 points 1 week ago

If your house has lead soldered pipes that could be an issue. Many (most?) plants tolerate lead well, I wouldn't want to use it on my tomatoes though. Radon could also be a problem for indoor air quality.

As far as temperature goes plants wouldn't be exposed to temps above body temperature, even in a hot climate rain is going to be well below that. In my experience seedlings especially do not like warmer water, when I use it I water around the plant and not at its base.

Whether your plants can benefit from increased minerals is going to depend on the plants needs, the soil mineral content, and the mineral content of your water.

this post was submitted on 29 Mar 2025

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