The pot covers have removable vinyl sleeves to protect against dripping. Or, set the plant’s pot into a container without holes in the bottom and slip the sleeve over both. For example, short deli containers work great for some pot sizes.
In the examples shown, floral motifs are fussy cut and fused to the sides of the covers. You can substitute a floral fabric for the pot covers or go without flowers and choose fabric of any pattern that you love.
The instructions, from designer Lori Harder, include covers to fit 4”, 6” and 8” flower pots. Crafty quilters should be able to adapt the instructions for larger pots.