Your spoiled plants are clamoring for 'More worm dirt!' Of course they are. Your homemade VermiHut compost is the richest, blackest dirt available at any price, and to you it's free. Expand your VermiHut Terra Cotta Worm Composter with these individual trays. Each tray holds about 1200 worms (not included), and converts an additional 1.5 pounds of kitchen garbage into rich, black compost every month. Trays stack seamlessly and effortlessly, so you can add as many as you want to your VermiHut kingdom.