This quest will be available only AFTER you've visited Thurgadin upon reaching level 90.
NOT GETTING THE QUEST FROM QHO? If you have the mail from Qho and when you visit him, you do not see a purple quest marker above his head, delete the mail from Qho and zone into Thurgadin. You will receive another copy of the mail. When you return to Mara, the quest should be active.
If you're questing or doing other things in the area, then ignore this and harvest as you go. If you're just out to get it done:
Head straight to Kerra Isle (Sundered Frontier) - you can get all the wood in one or two loops around the island if no one else is harvesting. Roots are plentiful here too. You may want to fish here if you don't have Hua Mein Village access.
Travel to Toxxulia Forest, get all your shrub harvests in this area (Toxxulia Prowlers area is good, too, if this area is low on nodes), finish off roots, and get whatever ore/gem nodes you pass - don't obsess over them, better area coming.
If you have a flying mount, jump over to Hua Mein Village (Need faction or avoid guards) and go fishing. You'll probably finish before you run out of nodes. Leave the village down the dry river bed, getting all the ore, gem, and trap nodes on the way. Done.
If you can't fly, go back to the Tox Forest station and travel to Stonebrunt Encampment, cross over to the river bed, head in the reverse direction (Toward Hua Mein Village) gathering rocks and dens. If you can't get in to the Village to fish, the little creek just outside has several nodes.
The river bed is harvested a lot, so you may need a few trips up and down to finish the ore/gem harvests.
Toxxulia timber (sumac lumber)
Sundered Frontier - Kerra Isle Station (seriously, Kerra Isle for wood..)
Stonebrunt Highlands - Moonfield Hamlet Station, Marred Plateau Station, Eye of El'Arad Station, Deepwater Pavilion Station
Talk to Qho Augren in the Village of Shin. He asks you to gather some harvests for him to study. (These resources are harvested in the Odus zones)
Gather 50 sumac
Gather 50 kejekan palmfruit
Gather 50 lapsang tea leaf
Mine 50 amber
Mine 50 quicksilver clusters
Gather 50 bamboo shoots
Gather 50 Marr cherries
Fish up 50 giant octopus meat
Fish up 50 seahorse roe
Gather 50 caynar nuts
Gather 50 mottled pelts
Gather 50 titanium ore
OPTIONAL: To speed things up, before you leave Mara, go into the bar across from the South Sea tents and buy a Return to Mara (one use) stone for 6g from the South Sea merchant who is drinking at the bar. Use it after you finish gathering the harvests to teleport back to Mara quickly.
Bring the harvests back to Qho Augren.
Good news! Qho's gotten permission to leave the village. But you'd better talk to his mother Lian Augren first, who is next to him in a little hut with a pack pony.
OPTIONAL: To speed things up, before you leave Mara, go into the bar across from the South Sea tents and buy another Return to Mara stone for 6g from the South Sea merchant who is drinking at the bar.
Apparently you've volunteered to take Qho to Great Divide and Thurgadin. Hail Qho.
If you've already been there you can take the griffin; otherwise, head for the city exit labeled "The Great Divide- Dain's Last Stand" at ( 673, -246, 56 ) /waypoint 673, -246, 56 and head southeast to ( 351, -15, 533 ) /waypoint 351, -15, 533.