Dirt is insanely difficult to acquire. Yes, you read that correctly.

The grade 3 topsoils are one, once per hour.
I just finished 30 minutes of gathering seeds - 43, plus about 440 shards. Not bad.
In the same amount of time, I managed just 5 grade 2 topsoils.

Give us other ways of getting topsoil for our gardens, or increase the gathering frequency.