🎬 Free course

Sex & Feminisation

Sex is decided at fertilisation. What remains adjustable is only the hormonal expression of the flowers. That single distinction decides whether you understand hermaphrodites, light leaks and feminised seeds – or pass on folklore. Second course of the breeding series.

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Registered users only

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

Decided in the Seed

Sex is settled long before you see the first pre-flower.

The Unknown Switch

The map is drawn. The switch on it has still not been found.

Hermaphrodites and Light Leaks – Two Fears, One Data Situation

The one number worth knowing – and two claims that were never measured.

Feminisation – the Mechanism

Why feminised seeds are female – and what silver actually does.