Described herein are biodegradable plant pots comprising an additive such as polyvinyl alcohol (PVA), polyvinyl acetate (PVAC), lime, a wax emulsion, or a combination thereof. The additives may be incorporated into the biodegradable plant pots during production, or impregnated into an additive-free biodegradable plant pot. Also described herein are methods and kits for making a biodegradable plant pot.