Overwatering is one of the most common ways houseplants die, but the problem is not always that you watered too often. More often, the compost has stayed wet for too long because it is too dense, the pot has poor drainage, the plant is sitting in excess water, or conditions are too cool for it to use the moisture quickly enough. Here is how to work out what is happening and, more importantly, what to do about it.
Step one: Stop watering and let the rootball breathe
The first thing to do is simple: stop watering.
Empty any water sitting in the saucer or decorative cover pot, then remove the plant from its cover pot so air can circulate around the rootball. If the compost is only slightly damp, giving it time to dry may be all the plant needs.
If it is completely waterlogged, however, you will need to inspect the roots.
Step two: Check the roots for rot
Gently slide the plant from its pot and inspect the root system. Healthy roots should feel firm and may be white, cream or tan depending on the plant. Rotten roots are typically brown or black, soft and mushy, and may have an unpleasant smell.
If you find root rot, this is the real issue. Simply allowing the wet compost to dry will not repair roots that have already started to decay.
- Trim away any soft, dark or mushy roots with clean, sharp scissors. Keep cutting until you reach firm, healthy tissue.
- Remove as much of the old, waterlogged compost as possible.
- Repot the plant into fresh, free-draining compost.
- Choose a pot with drainage holes and only go slightly larger than the remaining rootball. A pot that is far too large will hold more moisture around the roots and can make the problem worse.
We use carefully formulated blends from our own substrate range to give different plants the drainage and moisture retention they need. For a more detailed look at dealing with damaged roots, read our guide on how to save a houseplant with root rot.
Step three: Give it the right conditions to recover
Once the plant has been repotted, place it somewhere warm with bright, indirect light. Avoid harsh direct sunlight while the roots are damaged, as the plant may not be able to take up enough water to support its leaves.
Do not fertilise a stressed or recently repotted plant. Fertiliser will not fix damaged roots, and feeding while the root system is struggling can cause further stress. Give it time to settle and focus on producing healthy new roots instead.
When you do water again, wait until the compost has dried to the appropriate depth for that particular plant, then water thoroughly and allow the excess to drain away. Avoid frequent little splashes, which can leave the deeper compost continually damp.
How long does an overwatered plant take to recover?
There is no set timeline. A mildly overwatered plant may perk up within a few days once conditions improve, while a plant that has suffered root rot can take several weeks to recover.
Do not panic if it looks a little worse before it looks better. Yellow leaves may continue to drop after you have corrected the problem, particularly if the roots were damaged. The most encouraging sign is not necessarily a prettier plant straight away, but healthy new growth appearing once the root system has had time to recover.
The good news is that an overwatered plant is not automatically a lost cause. Catch the problem early, give the roots room to breathe and resist the urge to water it back to health. Sometimes the kindest thing you can give a struggling houseplant is a little less attention.
How to stop overwatering from happening again
Overwatering is almost always a drainage and habit problem, not a schedule problem.
- Always use a pot with drainage holes. This one change prevents most cases. See why drainage holes matter.
- Water to the plant, not the calendar. Check the compost first every time, with your finger or a moisture meter.
- Use a free-draining potting mix. Dense, water-retentive compost is a common culprit.
- Ease off in winter. Plants use far less water when growth slows and light drops.
If watering is the thing you most often get wrong, it is worth reading the best way to tell if a plant needs water. And if you would rather grow plants that shrug off the odd watering mistake, our almost unkillable houseplants are a forgiving place to start.