Pretty sturdy with 0% infill. Prints in 7 hours with no infill. No supports needed. Setup for a 3.5" inner diameter pot, but please triple-check the inner diameter for your specific plant. Can be scaled to fit 4" and 6" starter size pots.
Inner-diameter is currently setup to fit with my plant drainage spacer (https://www.thingiverse.com/thing:4755389) so that you can set your drainage pot on top of it and allow any water to drain and vent to atmosphere.
This object was made in Tinkercad. Edit it online https://www.tinkercad.com/things/9JnNkWjpeHl
9JnNkWjpeHl.stl | 268.5KB |