Nature's Ward question

[redwitchy]

So, my question is this : Does this proc off melee only attacks or can it be procced from raidwide auras i:e Bloodqueen Lanathel fight?

http://www.wowhead.com/spell=33882

Raided last night, but with 3 resto druids in the raid all in 4pt10 i had no idea if the rejuv's were from the talent or not :P[COLOR="red"][COLOR="red"]