In short: Coco pots (coir pots) are biodegradable seed and plant pots pressed from coconut-husk fibre. Seedlings are planted out pot and all — roots grow straight through the walls, so there is no transplant shock and no plastic to throw away. Pair them with a low-EC seed-starting medium and they are one of the simplest upgrades to a peat-free propagation setup.
What is a coco pot?
A coco pot is moulded from the same coconut-husk fibre as coco coir growing medium — usually the coarser strands, pressed with natural latex into a pot shape. They hold together for a growing season, then break down in the soil within months of planting out.
Why gardeners use them
- No transplant shock — you plant the whole pot; roots pass through the fibre wall rather than being disturbed.
- Air-pruning — the breathable wall stops roots circling, encouraging a denser, healthier root ball.
- Naturally free-draining — harder to overwater seedlings than in plastic cells.
- Plastic-free — the pot becomes soil conditioner instead of landfill.
How to use coco pots well
- Fill with a fine, low-EC medium. Seedlings are salt-sensitive — a dedicated seed-starting mix, or expanded buffered coir cut with a little sieved compost, gives reliable germination.
- Water little and often. The fibre wall wicks moisture; check daily in warm weather because coco pots dry faster than plastic.
- Plant out pot and all once roots show at the wall. Tear the rim off at soil level — an exposed rim can wick moisture away from the root zone.
- Bury completely. Fully buried fibre breaks down quickest and keeps the root zone even.
Coco pots vs plastic cells vs peat pots
| Coco pot | Plastic cell | Peat pot | |
|---|---|---|---|
| Transplanting | Plant whole pot | Prick out / knock out | Plant whole pot |
| Root health | Air-pruned | Can circle | Walls can resist roots if dry |
| Sustainability | Renewable husk by-product | Reusable but plastic | Peat extraction |
| Reusable? | No — single season | Yes | No |
With the UK's retail shift away from peat — B&Q, Kew and the RHS have all moved peat-free — coco pots have effectively replaced peat pots on most shelves.
Frequently asked questions
How long does a coco pot take to break down?
Once buried in moist soil, the wall typically softens within weeks and is largely gone within a few months, leaving fibre that conditions the soil.
Do coco pots go mouldy?
A white surface bloom can appear in warm, damp propagators — it is generally harmless saprophytic growth on the fibre surface. Improve airflow and let the surface dry slightly between waterings.
What should I fill coco pots with?
A fine, low-nutrient medium: our Seed Starting Mix is designed for exactly this, or expand a buffered coir brick and sieve it fine for sowing.
Peat-free propagation, sorted
Seed Starting Mix for the pots · 5 kg buffered coir brick (£16.99 → 75 L) for everything after. Why coir suits seed starting →