Item Level: 70
Skill Requirement: Herbalism Level 350
Recommended Level: 67+
If you’re looking for something unique to farm that well sell for a decent amount but at a slow rate then Netherbloom is a perfect candidate. Check the prices on your realm, I typically see 4-20 gold per Netherbloom but I have also seen prices drop to less than a gold at which point it wouldn’t be worth to farm them.
Typically characters who are leveling alchemy will need around 10 Netherbloom before they can start crafting Wrath of the Lich King items. Due to this, I post my Netherbloom in stacks of 20 unless someone else is posting in stacks smaller in which case I will post them in stacks of 10. If a player needs 10 but there is only a stack of 20, then oh well I guess you just sold twice as much Netherbloom as you would have otherwise.
You need skill level 350 to gather Netherbloom, and as its name suggests you will find it only in Netherstorm.
Update: You can make a lot of gold with Netherbloom, but if you want to step it up and make thousands of gold you should read my personal favorite guide.
Where to Farm Netherbloom
Farming Netherbloom in Netherstorm
The best place to farm Netherbloom, and the only place, is Netherstorm. It’s actually scattered all over the place just like most minerals and herbs in Outlands are. The best approach I have found is to circle the outsides of the island, staying close enough to the edges to see the very tip but close to the inside so that you maximize what you can see. This farming route should help:
Tip: Have you ever wondered how players have so many level 85s or how they can level an 85 so quickly? I use and strongy recommend Zygor's in-game leveling addon which will enable you to level in 5 days of played time. You can find a free version of it here.