What is the respawn time on Crimson Nirnroots? I want to make a lot of powerful damage health potions, but there's only 30 Crimson Nirnroots in the game, and they're scattered everywhere in Blackreach. I already slaved my way gathering 30 from all around the massive underground complex for the root quest, but now I would just like to camp near a close few of them, wait, and keep re-picking them isntead of running around constantly.

Any info appreciated.

There's more than 30 out there.
http://www.uesp.net/wiki/Skyrim:Crimson_Nirnroot
http://elderscrolls.wikia.com/wiki/Crimson_Nirnroot

Ah I see. Still, one source says 10 days and the other says undetermined. If it's at least 10 days I think I'll just settle for some less powerful poisons. I can't stand pin-balling all over the place for the roots.

They were surprisingly to collect. At first I thought it would be hard, but any intensive adventure of Blackreach will yield enough.

The fact they regrow is a plus.

Npcs, Creatures, Items, Normal Areas respawn after 240 Hours.
Areas that are marked cleared on your map respawn after 720 hours.
Merchants Respawn Items after 24 hours.