Earthworm Soil Test

Earthworm soil test – an activity for children of all ages. We can read all the books in the world about how important earthworms are to soil, but until we see it with our very own eyes, we may not really understand or believe it. This experiment will allow a child to see for themselves the impact worms have on soil. Do they truly make a soil richer?

  • Supplies:
    • two medium-sized pots
    • gardening gloves
    • spade
    • soil
    • worm castings
    • seeds of your choice: we suggest pumpkin seeds or alfalfa (if you live in a colder climate, you may need to move your pots indoors)
    • gardening journal
    • pencil
    • eraser
    • art medium of your choice (if desired)
  • Fill both pots with soil.
  • Add the worm castings to one pot.
  • Plant seeds in each pot per seed packet’s directions.
  • Place both pots in the sun.
  • Water the plants equally, again per seed packet’s directions.
  • Note and document findings in your gardening journal.
  • Don’t forget to transplant your plants outdoors when able (will depend upon your growing zone).

*Note: this experiment was found in the Wiggling Worms at Work book by Wendy Pfeffer.