If you didn't get to them before hitting 90, just go and do all their non-blue quests and you'll be rewarded with enough reputation for the recipes. These recipes are gated behind being honored with The Klaxxi, but if you hit 90 in that zone like most people do, you're likely to have enough reputation to get them without doing dailies. That said, this epic gear sells fairly slowly, so your major Harmony-soak is going to be weapons and maybe the 476 epic armor. Item level 496 gear is still good enough that people will want it in patch 5.2.

All these epic recipes take Blood Spirits, which are still somewhat rare and expensive, but much more attainable now that many realms have guilds with normal mode raids on farm.

Blacksmiths can also use Harmonies to craft epic 496 gear if they buy the somewhat expensive patterns off the AH (or get them in a raid or the Black Market Auction House). On my blacksmith, I can craft blue 463 weapons that require Harmonies, and some of these weapons sell for a fair bit of gold. If you have a profession that requires these to make items valuable to other players or allows you to use them to skip daily cooldowns, then you can figure out exactly how much one of them is worth and do the math. Songbell Seeds provide you with Motes of Harmony, which provide Spirits of Harmony. In short, the most profitable thing to plant is usually Songbell Seeds or Enigma Seeds. The reputation seeds for leather, ore, cloth, or enchanting mats are generally lower yield than simply getting Harmonies and trading those for what you need, and that's generally less than you'd get by planting Enigma Seeds, selling everything you get, and using that gold to buy leather, ore, cloth, or enchanting mats. This is only true because everyone else already farms them, and they're all you can farm until you get farther into the Tillers reputation grind. Generally, the least profitable thing to farm is vegetables. There is plenty of opportunity to improve this, though! So what is the most profitable thing to plant on your farm? Matt assumes correctly that the majority of people simply plant what they can use to avoid having to buy off the Auction House. So what's the start and end of the equation? I don't raid and can't stand dailies, so I only have patterns available that are vendor trained, bought with spirits of harmony, or learned off a cooldown. I, however, am a chronic alt-oholic and have every profession maxed and available to me. What's the most profitable thing to plant in a farm? I'd assume in most cases people plant for their profession or whatever raw material sells for the most.

Golden lotus farming