Gardening trick: Why are people putting sponges inside plant pots this summer?

Summer can be brutal on plants. Soil dries out faster, leaves begin to droop within hours, and even regular watering sometimes feels like it is not enough. That is why plant-lovers are constantly looking for simple tricks that help plants stay hydrated for longer without causing root rot. One unusual hack has recently been gaining attention online: placing an ordinary sponge at the bottom of a plant pot. While it may sound odd at first, many gardening enthusiasts say this small trick can make a noticeable difference during hot weather.

What does the sponge do?

Many often place the sponge directly over the drainage hole before adding soil. This allows water to move through the pot naturally while preventing soil from escaping through the bottom. Unlike stones or gravel, which are commonly used in pots, the sponge remains lightweight and capable of holding moisture at the same time.

Best time to use the hack

The trick becomes particularly helpful during summer vacations or long workdays when plants may go hours without attention. Because the sponge stores a small amount of water, the soil tends to stay damp a little longer than usual. For moisture-loving plants, this can reduce stress caused by sudden drying.


However, experienced people also point out that the hack works best in moderation. Using a sponge does not replace proper watering habits or good drainage. If the sponge stays constantly soaked, especially in humid conditions, it can encourage mould or root problems. That is why experts recommend using clean sponges and ensuring pots still have proper drainage holes.

The type of plant also matters. Tropical indoor plants, herbs, and flowering balcony plants often benefit more from steady moisture than succulents or cacti, which prefer dry conditions. Matching the watering method to the plant’s needs remains the most important factor.

Re-use your kitchen sponge

Another reason the trick is becoming popular is its affordability. Instead of buying expensive self-watering planters or moisture-control systems, many people are trying low-cost household alternatives to help plants survive harsh summers. A simple kitchen sponge becomes an easy gardening tool that almost anyone already has at home.

Beyond water retention, some believe the sponge can also help improve airflow around the lower part of the soil, although this depends on pot size and soil type. In compact containers where soil becomes dense quickly, the sponge may create a slightly better balance between moisture and drainage.