You must visit Thurgadin, City of the Coldainafter you've reached level 90 in your tradeskill, even if you've already been there.
If you've received the mail from Qho and he does not offer you the quest, delete his mail message and go to Thurgadin. You will receive another copy of the mail and when you return to Mara, the quest should be active.
Helpful Hints[]
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 Koros Splinterlimb, the South Sea merchant who is drinking at the bar. Use it after you finish gathering the harvests to teleport back to Mara quickly. These can be purchased in stacks of 20.
If you lose Qho during any of these steps, you can go back to Lian Augren and tell her you can't find him.
See the discussion page for information on good spots for harvests.
Since water is scarce on giant floating islands, a good place to find school of tiny fish are in north Stonebrunt Highlands in the lake around the entrance to The Deepwater Pavilion.
Bountiful Harvest is available and advised. Compact Sumac Harvesting Kit (12%) + Gi of the Ashen Artisan (12%) + Ample Harvest Tradeskill AA (15%) + Mark of the Far Seas (10%) can get even a free player to nearly 50% with a further 27% available from the Blessed Coldain Prayer Shawl and more from Harvest Nail adornments.
Good news! Qho's gotten permission to leave the village. But you'd better talk to his mother Lian Augren ( -52, 11, -112 ) Copy/waypoint -52, 11, -112 first, who is next to him in a little hut with a pack pony.
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 ) Copy/waypoint 673, -246, 56 and head southeast to ( 351, -15, 533 ) Copy/waypoint 351, -15, 533.
Go back to Thurgadin. See Merchant Hagus at ( 338, -292, 245 ) Copy/waypoint 338, -292, 245 (He is in the first room on your right as soon as you enter Icewell Keep).