The Geography of Henna:
Where Can Henna Grow?

where can henna grow?
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Henna will only grow where the minimum temperature is above 60 F or 11 C.
Henna is a small tree and has to grow for 5 years to mature and produce leaves with useful levels of tannin.
Therefore, for henna to grow outdoors unsheltered, the temperature must stay above 60F for many years.

Henna grows better in arid regions than wet regions.
Henna produces higher levels of tannins where the maximum temperature is very high.
Henna produces higher levels of tannins in very arid climages than in moist climates.

The hottest, dryest regions have henna with the highest levels of tannin that make the darkest stains. Henna from these areas can be dried, powdered, and sold.
If henna is from a moist region, the henna is good for use fresh, but is not good for use dried and powdered, because of the lower tannin levels.

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