Things You'll Need
- Latex primer
- Latex finish coat
- Drill, 1/2-inch bit
- Hardware cloth
- Marine spar varnish
Instructions
Select or construct a wooden worm bin made of hemlock or redwood for durability or untreated pine for minimal expense. Avoid any type of treated lumber in your worm bin, according to the Seattle Public Utilities website. Do not use black walnut or cedar, which contain tannins that may distress the worms.
Treat the exterior of your worm bin. Paint it with good-quality latex primer and a latex finish coat.
Drill ½-inch drainage holes covered with hardware cloth or screen in the bottom of your bin to remove excess moisture.
Apply two coats of marine spar varnish to the interior of the worm bin, allowing each to dry for 24 hours or longer in humid conditions. Introduce a test population of worms to the varnished worm bin for several weeks to note if they flourish in proximity to the varnish before adding your entire worm population.