Adder's Tongue, Northrend Herbalism in general

Can we please increase the timer for Adder's Tongue respawn in Sholazar Basic, or increase the amount of those herbs spawning in general?

They only grow in one place, is needed for Northrend Research and it seems that there are only about a dozen spawn locations for this herb.

To top it off it's almost impossible to farm these properly due to the amount of other players, especially the Horde in Onyxia, who are also hunting for these herbs.

I spent about 2 hours trying to collect these Adder's Tongues and barely scraped together 1 stack.