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@jonmagic
Created April 21, 2025 04:51
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🪱 3-Tier Worm Composter Setup & Maintenance Guide

🧱 Initial Setup

  1. Bottom Tier (Leachate Collection):

    • This tier does not get bedding, food scraps, or worms intentionally.
    • Its sole purpose is to collect leachate ("worm tea") from the upper composting trays.
    • Do not add newspaper, cardboard, or soil here.
    • Optional: Add twigs, mesh, or screen to help any wandering worms climb back up.
    • Ensure the spigot is open occasionally or place a container underneath to collect liquid.
  2. Middle Tier (Initial Worm Habitat):

    • Line the bottom with 2–3 layers of damp newspaper, extending up the sides.
    • Add moist bedding:
      • Shredded newspaper and cardboard (avoid glossy or colored materials).
      • Optional: Mix in a handful of soil or aged compost for microbial diversity.
    • Introduce your 750 worms evenly across the bedding (about 187 worms per composter).
    • Cover with a worm blanket or additional damp newspaper to retain moisture.
  3. Top Tier:

    • Leave empty for now. It will be added once the middle tier is nearing capacity.

🍽️ Feeding Guidelines

  • Initial Feeding:

    • Start with ½ to 1 cup of chopped food scraps every few days per composter.
    • Monitor consumption; only add more when previous food is mostly gone.
  • Suitable Foods:

    • Vegetable scraps, fruit peels (in moderation), coffee grounds, crushed eggshells, tea bags (without staples).
  • Foods to Avoid:

    • Meat, dairy, oily foods, citrus, onions, garlic, spicy foods.
  • Feeding Tips:

    • Always bury food scraps under the bedding to deter pests.
    • Rotate feeding spots to encourage even worm distribution.

💧 Moisture & Temperature Management

  • Moisture:

    • Bedding should feel like a wrung-out sponge.
    • If too wet: Add dry shredded paper or cardboard.
    • If too dry: Mist with water.
  • Temperature:

    • Ideal range: 55°F to 77°F (13°C to 25°C).
    • Place the bin in a shaded, well-ventilated area, away from direct sunlight.

🔁 Adding Additional Tiers

  • Once the middle tier is about 70% full:

    1. Prepare the next tier with moist bedding similar to the initial setup.
    2. Add a small amount of food to attract worms upward.
    3. Place the new tier on top, ensuring the bedding from the lower tier contacts the bottom of the new tier to allow worm migration.
    4. Cover with a worm blanket or damp newspaper.
  • Repeat this process as each tier fills.

🧺 Harvesting Worm Castings

  • When the bottom-most composting tier (not the leachate tray) is full and worms have migrated upward:
    1. Remove the tier and place it under bright light; worms will burrow away from the light.
    2. Scrape off the top layer of castings; repeat until most worms are separated.
    3. Alternatively, use a bait method:
      • Place a mesh bag with attractive food (e.g., melon) in the bin.
      • After 24–48 hours, remove the bag containing worms and relocate them.
    4. Use the harvested castings in your garden or potted plants.

🧂 Grit & pH Balance

  • Grit Alternatives:

    • Crushed eggshells: Rinse, dry, and grind into a powder.
    • Oyster shell flour: Provides calcium and helps buffer pH.
    • Sand: Use in small amounts; ensure it's clean and free from contaminants.
  • Application:

    • Sprinkle a small amount (~1 tablespoon) into each composter every few weeks to aid digestion and maintain pH balance.

🧼 Maintenance Tips

  • Regular Checks:

    • Monitor moisture levels, temperature, and food consumption in each composter.
    • Ensure no foul odors; a healthy bin should smell earthy.
  • Leachate Management:

    • Drain the bottom tray regularly to prevent anaerobic conditions.
    • Use leachate cautiously; dilute with water (10:1 ratio) before applying to non-edible plants.
  • Pest Control:

    • Avoid overfeeding and always bury food scraps to deter fruit flies and other pests.

Happy composting! Your worms will thrive with this setup, turning your kitchen scraps into nutrient-rich castings for your garden.

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