How to Make a Plastic Worm Composter


Worm composting, or vermicomposting, is a method of turning vegetable, paper and other waste into usable compost and worm casings for your garden. In a worm compost bin, worms eat organic and paper waste. The waste turns to compost after passing through the worms' bodies. Worm composting produces nutrient-rich compost because organic vegetable scraps are so high in nutrients. Making your own plastic worm composter is not difficult.

Step 1

Drill holes on the sides and bottom of one of the bins using a drill. Drill these holes about an inch apart. These air holes will keep your worms healthy.

Step 2

Cut your window screen to cover all four sides and the bottom of the inside of your bin.

Step 3

Hot glue the window screen in place. The window screen will keep any small worms from escaping through the holes into the lower bin.

Step 4

Place a brick in each corner of the undrilled bin.

Step 5

Slip the drilled bin with screens into the undrilled bin. The bricks will raise the drilled bin up and allow airflow around the sides and bottom of your drilled worm bin.

Step 6

Shred 3 to 4 inches of scrap paper into the bottom of the bin. Moisten the paper, but do not let it become soaking wet.

Step 7

Place a handful of dirt into the paper to give the worms the grit necessary for digestion.

Step 8

Calculate the average weight of organic vegetative waste you generate per day.

Step 9

Add double the amount of worms as your expected waste. For example, if you calculate that you generate 1 pound of waste, add 2 pounds of worms. A worm can consume about half its weight per day of vegetable waste from your kitchen.

Things You'll Need

  • Two identical 8- or10-gallon plastic bins with lids
  • Drill
  • 1/4-inch drill bit
  • Window screen
  • Hot glue
  • 4 bricks
  • Red wiggler worms


  • Cornell University: Worm Composting Basics
  • Washington State University: Cheap and Easy Worm Bin
  • University of Kentucky: Constructing a Worm Composting Bin
Keywords: vermicomposting tips, vermicompost bins, worm compost bins

About this Author

Although he grew up in Latin America, Mr. Ma is a writer based in Denver. He has been writing since 1987 and has written for NPR, AP, Boeing, Ford New Holland, Microsoft, RAHCO International, Umax Data Systems and other manufacturers in Taiwan. He studied creative writing at Mankato State University in Minnesota. He speaks fluent Mandarin Chinese, English and reads Spanish.