It sometimes seems that our understanding of Lavandin can go through three stages.
The first is to see it as a type of Lavender. This is completely understandable because it has an aroma which is distinctly ‘lavender-ish’ and a name that suggests a connection. And in a way it is ‘lavender’.
Lavandin is actually a hybrid plant, a cross between Spike Lavender (Lavandula latifolia) and True Lavender (Lavandula angustifolia). True Lavender is quite small and thrives above about 1000 metres, while Spike Lavender is a larger plant which grows lower down the mountain.
There will be a certain altitude — and a certain time of the year — when, if the conditions are right, both are in bloom in the same place and at the same time, and then there is a possibility of cross pollination. This creates the hybrid plant which we know as Lavandin.