In this article, I will tell you all about the symptoms of an overwatered basil plant, the causes, and what you can do about it to fix the problem for good.
Let’s dive right in.
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Overwatered basil plants have leaves that are pale and wilted. The roots may also feel mushy and rotten when touched. To fix this, adjust your watering schedule or repot your plant. Other factors causing this are the wrong soil or pot or your plant not receiving enough sunlight.
Symptoms of an overwatered basil
If you overwater your basil, symptoms will mostly appear in the foliage. In the early signs of overwatering, you may notice that the usually bright green leaves have become paler and will eventually begin to turn yellow and wilt downwards.
The soil will be very soggy and moist to the touch, and you may even notice a foul smell coming from it.
If you were to push back some of the soil around where the root ball should be, you might also be able to see and feel mushiness and rot on the roots.
Consistently overwatering your basil can lead to root rot, which can be fatal to your plant.
It is therefore important that you can identify the factors that are causing your basil to become overwatered so that you know what action to take to fix this.
Factors that cause an overwatered basil
You might think that the only cause of an overwatered plant is giving it too much water. But this isn’t entirely true. Many other factors can contribute to your plant suffering from overwatering, even if you are watering it as recommended.
Wrong choice of soil
Basil plants have a preference for soil that has well-draining qualities. If the soil is too heavy, for example, if you use a clay-soil mix, the water will not drain as quickly as needed, leading to the water getting stuck in the soil.
I would even suggest adding horticultural sand or gravel into your soil to ensure that your basil gets the maximum amount of drainage that it can.
Wrong choice of pot
If your pot doesn’t have adequate drainage holes, it will also contribute to the effects of overwatering.
Basil plants need pots that have multiple drainage holes in the bottom so that any excess water can easily escape.
Without this, the water will become clogged in the soil and will harbor around the roots, leaving your basil at risk of fungal diseases such as root rot.
When watering your basil, I would suggest placing a drip tray underneath and letting it sit in it for around 15-20 minutes before discarding any excess water.
Inadequate amount of sunlight
If your basil doesn’t get enough sunlight, this can contribute to overwatering, as the water won’t be able to evaporate at a quick enough rate.
Often, the mistake that is made is plant owners thinking that their basil needs watering again because the topsoil has become dry or moist to touch when, in reality, the soil below this still has an adequate amount of moisture.
Basil plants need at least 6 hours of sunlight a day, which might mean that you need to move your plant around your garden or home to ensure adequate sunlight throughout the year.
When there isn’t as much warmth in the cooler seasons, you should water your basil less frequently.
Treating an overwatered basil
Extreme cases of overwatering in Basil are best treated by repotting the plant entirely. This is considered a last resort but should be done if your plant is experiencing major symptoms and has shown no signs of recovery.
To repot your basil, start by removing your plant from the soil. The root ball is very fragile and should be handled with the utmost care to avoid your basil going into shock.
Once you remove your basil from the soil, try to remove as much of the wet soil from the roots as possible.
Although it might seem counterproductive, you should then rinse the roots under a steady stream of water. It is vital to remove all traces of the previous soil before replanting in case any infection or disease, such as root rot, has been harbored in it.
Depending on the extent of the overwatering, it could be possible that some of the roots have become brown mushy.
These should be removed with a sterile pruning tool to increase your plant’s chances of survival and prevent any infection from spreading to the rest of the plant.
Finally, you can repot your basil into fresh soil in a thoroughly sterilized or new pot.
Mildly overwatered basil – Do this
Mild overwatering can be treated by simply letting the soil dry out. Move your plant into a warm area, but not into direct sunlight.
Your basil mustn’t be watered again until the soil is completely dry.
Often, gardeners make the mistake of watering their plant again once the topsoil is dry to the touch, not taking into account the moisture that could still be in the soil below.
Even if the top few inches of the soil are dry, the rest of the soil could still be wet. Ensure that you only water your basil again after the bottom soil has become moist but no longer soggy.
Overwatered basil will benefit from pruning
If your plant is suffering badly from foliage damage due to overwatering, the first course of action should be to prune off any of the affected leaves.
Doing so will help your basil recover, as this will stop your plant from using vital energy and nutrients on the dying foliage.
Unlike other species of herbs, damaged basil leaves won’t recover from any damage. Remove them with a clean pruning tool, cutting from the stems of the leaf but avoiding the main stems of your plant.
Frequently Asked Questions about Overwatered Basil
What type of water is best for basil?
Basil plants aren’t too fussy when it comes to water type, and are not very pH sensitive. You should only use room temperature water when watering your basil plant, and never water that is too cold or too hot.
Daniel has been a plant enthusiast for over 20 years. He owns hundreds of houseplants and prepares for the chili growing seasons yearly with great anticipation. His favorite plants are plant species in the Araceae family, such as Monstera, Philodendron, and Anthurium. He also loves gardening and is growing hot peppers, tomatoes, and many more vegetables.