"Basin watering" hexagon flow pot, hexagon to allow packing the pots right next to each other. Fill the the bottom with pot gravel, and the rest with soil.
No supports needed. Default infills (15% gyroid). 3 outer perimeters makes little stronger than default 2. Fits Prusa Mini.
The pot can be printed by PLA or PETG... or even ABS, it shouldn't matter. I used 0.2mm layer height and 0.4mm nozzle, but other sizes should also work.
The base and the plug should be printed from flexible plastics. I used ColorFabb Varioshore TPU to print those at 220C to maximize the softness. Both are fully optional parts. Base just adds nice soft base, and plug will prevents some evaporation. Plug is really tight, so if your plastic isn't as flexible, you might need to scale it down little bit.
The author hasn't provided the model origin yet.