Onion Seed

The Onion Seed is a seed added by Pam's HarvestCraft, which grows into an Onion Plant on Farmland. When broken, it will drop nothing. However, when right-clicked, it will drop 1 Onion (or 1-2 Onions before version 1.8.9a) and the crop's growth will go back to its pre-mature form. Bone Meal may cause the crop to grow one stage, just like regular Vanilla crops.

Recipe
Onion Seeds can also be obtained from the Windy Garden (or from the Ground Garden before version 1.8.9a) or from breaking Grass if configured.