It's easy to love your container garden a little too much with the watering can. Overwatering is a common issue in urban planter boxes, where drainage can be tricky. Here’s how to know if you're giving your plants more water than they need.
First, check the soil. Before you water, push your finger about an inch into the soil. If it feels damp or cold, hold off on watering. The top layer can dry quickly in the sun, while the root zone remains wet.
Look for yellowing leaves. While often a sign of many issues, leaves that turn yellow, particularly the lower ones, and feel soft or mushy often point to too much water. Underwatered leaves typically turn dry and crispy.
Watch for wilting with wet soil. This is a classic paradox. If your plant is drooping but the soil is still moist, the roots may be suffocating and rotting due to excess water, preventing them from absorbing moisture.
Be alert for mold or algae. A green, fuzzy coating on the soil surface or on the planter box itself is a clear sign of persistent dampness and poor air circulation.
Finally, inspect for root rot. If you suspect overwatering, gently remove the plant. Healthy roots are white or light tan and firm. Overwatered roots are dark brown or black, slimy, and may have a foul odor.
To fix the problem, stop watering immediately. Let the soil dry out completely. Ensure your planter boxes have adequate drainage holes. Consider repotting with fresh, well-draining potting mix if root rot is present. Adjust your routine to water only when the soil is dry to the touch an inch below the surface.