Which Potting Soil to Use for Each Plant (and Why It Matters)
The right soil prevents half your problems. Learn which mix to use for succulents, tropicals, orchids and the garden, and the ingredients that improve any soil.
In this article
Soil is the home of the roots, and choosing the right one prevents half your problems (especially the dreaded root rot). Garden soil won't do for pots: it compacts, doesn't drain and suffocates the roots. Here's what to use for each plant.
What a good potting mix needs
- Drainage: so excess water runs out fast.
- Aeration: air pockets so the roots can breathe.
- Just-right retention: holds some moisture without waterlogging.
- Nutrients: to feed for a few months (then you'll need to fertilize).
Soil by plant type
| Plant type | Recommended mix |
|---|---|
| Tropicals (Monstera, pothos, philo) | All-purpose + 20-30% perlite + some coco coir |
| Succulents and cacti | Specific cactus mix (very mineral and free-draining) |
| Orchids | Pine bark (never soil!) |
| Ferns / calatheas | Airy but moisture-retaining (peat/coco + perlite) |
| Garden (tomato, strawberries) | All-purpose rich in compost or castings |
Ingredients that improve any soil
- Perlite: white beads that aerate and improve drainage. The most useful.
- Coco coir: holds moisture without compacting; a sustainable alternative to peat.
- Compost / worm castings: add nutrients and life to the soil.
- Pine bark: structure and air; ideal for aroids and orchids.
- Coarse sand or pumice: extra drainage for succulents.
An easy "good for almost anything" recipe
A mix that suits most houseplants:
3 parts all-purpose potting soil + 1 part perlite + 1 part coco coir. Airy, drains well and holds just enough moisture.
Common mistakes
- Using garden soil in pots (it compacts and waterlogs).
- A mix with no perlite: holds too much water.
- Reusing old, spent soil from a plant that rotted.
Get the soil right and watering becomes much easier. Unsure about a plant? Try the AI diagnosis.
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