The best water for houseplants (and what each kind does to them)
The best water isn't the purest. Plants need minerals from their water and none of the chlorine, chloramine, fluoride and sodium that come with most taps. Here's the honest comparison.
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Is your current water the problem?
Brown tips or crisp edges on more than one plant.
White crust on soil, pots or saucers.
You're on city water, a softener, or a well with a lot of iron or hardness.
Two of three and it's worth switching:
What's in tap water
US city water is treated with chlorine or, increasingly, chloramine, and most of it is fluoridated. Old pipes can add lead. Softeners add sodium. Each is fine for you at those levels and hard on plants at every watering.
Plants also need what good water carries: calcium, magnesium, potassium and trace minerals. Take those away for months and growth slows and leaves pale — the distilled-water trap.
The options, compared
| Option | Removes chlorine | Removes chloramine | Removes fluoride | Keeps minerals | Cost per month | Verdict |
|---|---|---|---|---|---|---|
| Tap (unfiltered) | No | No | No | Yes | $0 | Depends on your city |
| Sitting overnight | Partly | No | No | Yes | $0 | Not enough |
| Distilled | Yes | Yes | Yes | No | $15–25 in jugs | Clean but empty |
| Reverse osmosis | Yes | Yes | Mostly | No | $200+ install | Clean but empty |
| Bottled spring | Varies | Varies | Varies | Yes | $20–40 | Unpredictable |
| Rainwater | Yes | Yes | Yes | Some | $0 | Great if you can collect it |
| Softened | No | No | No | Adds sodium | — | Avoid |
| Filtered and remineralized (the can) | Yes | Yes | Yes | Yes, adds 20+ back | ~$8 in filter packs | The middle path |
Watering Can With Filter and Remineralizer for House Plants
Filters chlorine, chloramine, fluoride and lead as you pour, then adds back 20+ minerals
$69 · Free shipping · 30-day money-back guarantee
plus sales tax where applicable
How to switch without shocking plants
Just switch. Plants don't need a transition; they need the next watering to be better than the last.
Start with the next can. The water change is immediate.
Flush pots that have a crust.
A full can of filtered water through the soil rinses old salts out the drainage hole.
Watch new growth.
Old damage won't reverse, but new leaves will show the difference within a few weeks.
When the water isn't the problem
Yellow lower leaves and sour soil are overwatering. Pale, leggy growth is light. Sudden leaf drop is a draft or a move. Fix those on their own terms.
Frequently asked questions.
Better water, tonight's watering.
- $69 · Free shipping · 30-day money-back guarantee
- Free shipping
- 30-day money-back guarantee
- Replaceable filter packs