For the following three quests...

It's a Piece of Cake to Bake a Poison Cake
Woes of the Botanist
A Weaver and a Mummer

...what are the requirements to start them? As an Adder, Sergeant First Class, I was only able to pick up Woes of the Botanist. Any chance that the other two unlock for Adders at Chief Sergeant? Or are each of these three quests unique to the members of their local grand company, unlike the three Beastmen Stronghold quests that were introduced last patch?