I recently started planting seeds in the Epic 6-Cell Seed Trays from Epic Gardening and when I saw Kevin using a hand-carved wooden tool to poke holes for planting, I realized I could have a bit of fun designing something of my own. After using the first iteration, my wife asked me to add a pommel on the end to make it easier to press into denser soil.
P.S. Get your mind out of the gutter.
Links (not affiliate links, I just like the product):
If you wish to a version with longer/shorter handle, you can adjust that via the CAD source file at onshape.
Notes:
No need for high resolution prints here. You want strength/rigidity more than smooth surfaces.
I used 0.3mm layers with 10% gyroid infill, 3 perimeters, and 1.2mm top/bottom layers for a bit of rigidity.
The author marked this model as their own original creation. Imported from Thingiverse.