Plant Pathology Infobytes
November 6, 1998
Hints for Happier and Healthier Houseplants
One of the most common houseplant problems shows up following the beginning of cooler weather in the fall. A favorite plant will wilt and develop yellow off-color leaves. These symptoms are generally followed by extensive leaf drop.
In many cases, leaf drop can be traced to over-watering. It's true plants need water during all seasons, but when maintained inside at this time of year, the water requirements of most plants aren't nearly as great as when growing outside on the porch or patio during the summer.
It's easy to determine if your plant's problem is related to excessive watering. If the growing medium is soggy, the root system has a "sour" smell, and roots are dark and off-colored, the problem is most likely due to houseplant watering practices. You should be able to take a peek at the roots of larger plants by gently sliding the plant part way out of the container.
As a general rule, maintaining an even supply of soil moisture will keep most houseplants happy. The best rule-of-thumb is to find out about your plant's specific water requirements and water accordingly. However, there are some practices to avoid such as keeping a plant sitting in water in its saucer. Remember, too much of a good thing can spell disaster, particularly when it leads to root or stem rot.
Leaf drop can also be caused by overheating as well. Plants placed too closely to heaters or air outlets are subject to desiccation and should be moved to a friendlier environment to prevent excessive foliage loss.
Keep an eye on your houseplants for signs of distress. If you diagnose the problem quickly enough, it can often be corrected in time to return the plant to good health.
If you need assistance in diagnosing houseplant problems, check with us at your county Extension office for advice.
Infobytes newsletter was written by the late Dr. Frank Killebrew, Extension Specialist.