Increases experience gained for the specified arts, skill groups, or equipped weapons.
Skill boosts don't affect their individual art experience, and art boosts don't affect the corresponding skill either.
For equipment this results in gaining +'s faster and applies to both the main- and offhand slot.
+100% XP - +200% XP.
Growth Boost can be found on all Remnant accessories, and a few high priced trinkets/garments and shields.
For a list of items with this effect, see Growth Boost Equipment
The [Growth Boost] Equipment effect does not work properly, and thus does not help with strengthening equipment.