🎬 Free course

Substrate Basics

Soil buffers, coco reacts instantly, rockwool forgives nothing: in five short lessons, learn how your substrate affects pH and EC, why air is the third ingredient, how to reuse it – and which watering/feeding strategy actually fits it.

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Registered users only

This course is free – all you need is an account.

The Buffer Beneath the Roots

Same solution, two different worlds.

Substrates With No Memory

No reserve, no buffer – you are the buffer.

Which Strategy Fits Your Substrate?

There’s no single best strategy – only pairs that fit together.

Air – the Third Ingredient

Substrate isn’t just water and nutrients – the third ingredient is the one most often forgotten.

Reusing Substrate

Not “just keep watering” – a procedure with four steps.