The short answer
Use an airy potting mix that holds some moisture but drains freely. Indoor potting mix amended with coarse bark and perlite is a common approach.
Why this happens
A monstera needs both water and oxygen around its roots. Dense garden soil compacts in containers, while an extremely coarse mix may dry too quickly in a warm home. Adjust to your environment rather than following a rigid recipe.
What to do
- Choose a container potting mix, not garden soil.
- Add coarse aerating material if the mix is dense.
- Use a pot with unobstructed drainage holes.
- Check drying speed after repotting before settling into a watering routine.
Keep in mind
Gravel at the bottom does not replace drainage holes or fix a water-retentive mix.