Mooire of Ferocious Bite, a drood blog, has recently posted a guide to gaining Sporeggar rep, just in time for all the non-combat fans to make a quick grind. After all, if you need one, you simply need it to be had on patch day. How will we co-ordinate with our flying mounts otherwise?
The "Bring me a(nother) shrubbery!" quest is undoubtedly the easiest way to gain reputation, provided you can get into a group for Underbog. Mooire found that each run can yield 20-30 sanguine hibiscus, and at 750 rep per 5 turned in, that's up to 4 500 reputation per dungeon run.
If you have the herbalism skill, Mooire points out that many of the mobs will shed sanguine hibiscus. For rogues and droods, some of the plants can be gained without the aid of a group by stealthing through the dungeon.
Reaching exalted with Sporeggar may bring fashionable benefits as well. After all, what blood elf male doesn't secretly long for the pinky-purple mushroom tabard?
For those of you who are still leveling, or who have seriously neglected this particular faction, then there are other quests and turnins to be done before locking into an Underbog group.