Encouraging Earthworms in Acidic, Volcanic Soil

Your volcanic soil is acidic, well-draining, rich in organic matter and mulch, yet you rarely see earthworms. You’ve added calcified seaweed, potassium, and phosphorus per lab recommendations. You wonder if you have the wrong worm species or need another amendment.

Key Factor: Moisture

Earthworms die or leave if soil gets too dry. Your note “it can get quite dry” is the likely culprit.

Actions to Boost Worm Populations

• Add more organic matter to improve moisture retention.
• Bi-monthly, dust the area with cornmeal to feed worms.
• Don’t let the area dry out completely.
• Collect local worms (bait-shop worms often don’t survive in native soils).

Consistent moisture and food will attract and sustain a healthy worm population.