Print in vase mode!
The “long leg planter” is designed to have wooden dowels or something similar slid upward into the base to act as legs or as an integrated plant stand.
The “starburst” pot can be printed with either end being the bottom.
Print in vase mode with 3-5 bottom layers, and an extrusion width of at least 1 mm. Alternatively print with 0 top layers, 0 infill and as many walls as you think you need. Scale to suit.
I usually drop my nursery pots right inside, so these act as a water catch tray. If using as a pot by itself, it would be a good idea to make a couple drainage holes around the bottom with a drill or soldering iron.