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Why does leaf size increase the closer you get to the equator?

Leaf Size.pdf (861.3 KB)

This paper examinines the relationship between latitude, altitude, humidity, and leaf size.

Helps explain differences in the way indicas and sativas grow – sativas were typically found in more humid environments, while indicas tended to appear in more arid environments. Also explains why ruderalis is so small – it’s so dang cold where it’s naturally found.


Larger leaf size in the tropics is often a result of the location of the plant. Larger leaf sizes in understory plants plants is a result of adaptation to maximize absorption of light. I have grown pepper clones in high light and low light conditions and the leaves are larger in the low light conditions.

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