Board Thread:Questions and Answers/@comment-37.123.140.97-20130404085739/@comment-80.229.0.24-20130412234713

I've had the same exact issue - I have no idea what's causing it, though. I made the same setup in single-player creative mode, and it worked great. Tried it on my server and no such luck.

It just seems to leave most of the seeds on the 3x3 dirt. WHY?!!?