Purity Leaf (Plant)

Purity Leaf is a Plant that can be grown in a Herb Garden. It produces Settings\ThingDef\Plant\Plant_Special.xml, which is used in the creation of Pills. 
Despite its description, the Qi on tile needed for its growth is only 25, which is usually below the quantity on any tile of the map outside of the Qi Drought Weather.
=== Yield / day ===
As Purity Leaf is a low Plant, it has a rest time between 19:00 (7PM) and 4:00 (4AM) everyday, making its actual Growth time:
 (44 * 0.95 + 12) * 24 / 15 = 86.08 days
At 100% Growth Speed.
With >100% Harvest Yield, it means you obtain 3 every \frac{86.08}{GrowthSpeed} days, or 1 per \frac{28.07}{GrowthSpeed} days per plot.
==References==