Congrats! I did get one a while back, wasn't even aware it came that way till I harvested it. I have been harvesting the special stuff ever since. Like songbells for motes and the one the results in Cloth. I would guess it doesn't drop from these, it has to be the normal seeds that result in cooking ingredients. I haven't seen one again in 2 months(probably more) of farming the non cooking seeds.
A side note, these seem to be becoming relatively cheap now. I saw one for under 50 gold so I grabbed it for my daughters account, she doesn't play much but likes having the pets when she does.
A great pet for farming low level rares. It's first skill will only bring it to 1 hit point without fear of killing it. Who here has not felt the sting of a crit hit on a rare you have been camping for longer than you would like!! BAM dead rare.