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Coir & preparation · WITH COBY

Should coarse and fine cocopeat be layered in a pot?

A layered container is a different physical system from a thoroughly mixed blend. Evaluate the complete profile before adopting a layered recipe.

Teral grower guidance · Updated 27 October 2026

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THE COCOPEAT CONNECTION

Why the root zone matters

Water movement can change at boundaries between materials. A coarse bottom layer does not automatically make the fine upper layer drain better.

01 / OBSERVE

Three checks before you change anything

  1. Identify each layer and its depth in a trial container.
  2. Compare moisture above and below the interface after normal watering.
  3. Test a consistently mixed alternative under the same crop conditions.

02 / NARROW IT DOWN

Why are you adding layers?

Choose the closest observation for a suggested next check.

To improve drainage

Check outlets and the overall blend first. Trial the proposed layer arrangement rather than assuming it removes a wet zone.

To save expensive material

Evaluate whether the change affects rooting or moisture uniformity. Cost per filled pot is only one part of the comparison.

To match an existing system

Document the established method and its measured performance before changing layer thickness or ingredients.

03 / TAKE THE NEXT STEP

Leave with something useful

Compare whole-container behaviour in a small trial and keep the layers clearly documented.

Keep in mind

Do not recommend gravel, chips or coarse coir as a universal drainage layer.

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