Morrowgrain to Darnassus

Mathrengyl Bearwalker: "The Arch Druid is always looking for additional morrowgrain for the Cenarion Circle's continued research. We take them in increments of ten, and award you with a cache of goods you should find useful. When you have ten, let me know and I will reward you accordingly."

Use an Evergreen Pouch with a Packet of Tharlendris Seeds and two Un'Goro Soil samples to try and cultivate samples of Morrowgrain. Bring 10 Morrowgrain to Mathrengyl Bearwalker in Darnassus.

Mathrengyl Bearwalker: "Excellent - this morrowgrain will no doubt please the Arch Druid. I must admit though... just being near them makes me feel a little uncomfortable. I can only imagine how difficult it is for the Arch Druid to tolerate them in such large numbers! This is for you. The Cenarion Circle thanks you for your continued support."

• Cenarion Circle Cache

This quest is repeatable, was one of the best ways to get to Exalted with Darnassus, prior to Alterac Valley and Runecloth turn-in. The same holds true if one does the Horde version of this quest and is bringing Morrowgrain to Thunder Bluff for the Tauren. Each stack of 10 Morrowgrain turned in will increase the reputation of the player by 50 with Darnassus or Thunder Bluff. (Strangely, the player's reputation with the Cenarion Circle does not improve at all, even though it's Cenarion Circle members on both sides who send the player on this quest.)

There is an alternate quest chain in Feathermoon Stronghold starting with The Mystery of Morrowgrain

The consequences of this quest are eventually revealed in the novel Stormrage, in which it is discovered that Fandral Staghelm has been using Morrowgrain to poison Malfurion Stormrage.