Date: 5 Nov 2024
How much water is too much?
"Always over-water your plants: just improve their soil drainage!" - Murray Corman, horticulturist, rare tropical fruit tree expert.
Q: I always tend to overwater my plants. How often should I water container plants and how to determine if it's too much water?
A: One of the most common challenges in tropical plant care, including houseplants, is overwatering, particularly in container gardening. So, how much water is too much?
The rule of thumb: let the soil dry out a bit before watering again, and never water if the soil feels wet to the touch. For indoor plants with saucers underneath, ensure they don't sit in standing water by removing any excess from the saucer after watering. However, remember that the watering schedule alone isn't the only key to success!
Improve drainage. Surprisingly, water itself isn't harmful to plants, no matter how generous your watering is. The real issue is poor drainage, which leads to stagnation and bacterial buildup, ultimately causing root rot.
In the nature. If you've traveled to places like Hawaii or explored tropical jungles, you might have noticed plants thriving between rocks with minimal soil, receiving a near-constant fine mist of rain. Conversely, swamps support very few trees - only bog or water plants adapted to wet conditions can survive there. The lesson? It's not the water, it's the growing medium!
The Soil Solution: for potted plants, always use a high-quality potting mix with excellent drainage properties. This should include ample "soil conditioners" such as perlite, vermiculite, and pine bark. At our nursery, we use a professional soil mix called Abundance. Learn more about potting soil.
Pot size matters. And the last but not least: if you tend to overwater your potted plants, consider using the smallest container size that comfortably fits the root system. A pot that's too large can mean excess wet soil, increasing the risk of root rot. With proper fertilizer program, container plants don't need to much soil to thrive.
Photo above: Datura Metel - Horn-of-Plenty - doesn't need a large container for happy blooming indoors!
