Regrowth is a level 3 druidhealing spell. Regrowth is a fast spell to cast and heals for a decent amount, but this is balanced by poor mana efficiency. While the spell has a small HoT component it is mainly a direct heal.
The initial heal from Regrowth can crit just like other direct healing spells. A critical effect on the initial heal will not have any effect on the amount of healing done by the HoT.
The Heal over time effect can crit, based on critical strike.
Talents, artifact traits, and legendaries have been updated to affect Regrowth where appropriate.
(Restoration) Regrowth has 40% additional chance to crit (was 60%).
Now learned at level 5.
(Restoration) Additional chance to crit now learned at level 44.
Patch 6.0.2 (2014-10-14): Now has a duration of 12 seconds (up from 6 seconds), but no longer refreshes its duration on targets at or below 50% health.
Hotfix (2013-04-16):Glyph of Regrowth should now properly remove the periodic component of Regrowth while active.
Patch 5.0.4 (2012-08-28): Now a Restoration specialization ability, has a 60% increased chance for a critical effect, and the duration automatically refreshes to 6 sec each time Regrowth heals targets at or below 50% health.
Patch 4.0.1 (2010-10-12): Cast time reduced, initial heal greatly increased and HoT reduced.
Patch 2.4.0 (2008-03-25): Mana costs reduced by 20%.
Patch 0.7 (2004-06-15): Mana cost and heal amount increased.