Torchflower seeds don't contribute to the "A Seedy Place" advancement

The Bug:

Torchflower seeds don't contribute to the "A Seedy Place" advancement.

Steps to Reproduce:

1. Obtain some torchflower seeds and place down some farmland.
2. Place the torchflower seeds on the farmland.
3. Take note as to whether or not torchflower seeds contribute to the "A Seedy Place" advancement.

Observed Behavior:

Torchflower seeds don't contribute to the "A Seedy Place" advancement.

Expected Behavior:

Torchflower seeds would contribute to the "A Seedy Place" advancement.