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Complete guide to houseplants in the home

Is rainwater good for houseplants?

by Plants for all Seasons 15 Mar 2023 0 Comments

Rainwater is generally considered beneficial for houseplants because it is naturally soft, free of added chemicals, and has a more balanced pH level compared to tap water. Using rainwater can provide several advantages for your houseplants:

  1. Soft water: Rainwater does not contain the calcium and magnesium found in hard tap water, which can lead to mineral buildup in the soil. This makes it easier for plants to absorb essential nutrients without being negatively affected by excess minerals.

  2. Balanced pH: Rainwater typically has a neutral or slightly acidic pH, which is suitable for many houseplants. Acid-loving plants, in particular, can benefit from rainwater, as tap water might be too alkaline for them.

  3. No added chemicals: Rainwater is free of chlorine, chloramine, fluoride, and other chemicals commonly found in tap water, which can be harmful to sensitive plants.

  4. Dissolved nutrients: Rainwater can contain trace amounts of dissolved nutrients from the atmosphere, providing additional nourishment for your houseplants.

However, it's important to be cautious about potential pollutants in collected rainwater, especially if you live in an urban area with high levels of air pollution or if you collect the water from your roof. Pollutants, debris, or bird droppings could contaminate the rainwater, so it's essential to filter the water before using it on your houseplants.

If you decide to use rainwater for your houseplants, collect it in a clean container and store it in a cool, dark place until you need it. A rain barrel with a spigot and a fine mesh screen to keep out debris can be a practical and efficient way to collect rainwater for your plants.

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