The Worm Bank

Vermicomposting system converting kitchen scraps and paper into worm castings — one of the highest-quality soil amendments available.

Footprint 2ft x 3ft x 1.5ftIndoor-friendly stackable bins Yield ~5 lbs castings/monthEnough for several gardens Cycle Weekly feedHarvest every 2–3 months

Cost tier entryDifficulty weekendLand noneRisk lowMonthly savings ~$15First benefit ~30 days

② The Manifest

The parts list. Cores are what you actually need; “if you prefer” opens cheaper, local, or heritage swaps — never budget fallbacks, just other good ways.

Bin

Stacking tray worm bin~$50

E.g., Worm Factory 360.

if you prefer… (1)

Two nested 10-gal Rubbermaid totes~$12DIY. Drill drainage holes.

Worms

Red wigglers (Eisenia fetida), 1 lb~$30

Starter colony.

if you prefer… (1)

European nightcrawlers~$35Wider temp tolerance.

Bedding

Shredded cardboard + coco coir~$10

Moist like a wrung sponge.

③ The Sequence

01Prepare bin15 min Set up bin. Drill ventilation and drainage holes if DIY.
02Add bedding10 min 4–6" deep moistened bedding.
03Add worms5 min Introduce colony. Leave lid off under light for 1 hour (prevents escape).
04Begin feeding5 min Fruit/veg scraps, coffee grounds, eggshells. Bury under bedding. No meat/dairy/oils.
05Maintainongoing Feed 1–2x/week. Rotate zones. Harvest when lower trays are dark and earthy.

⑤ The Echo

The Quiet Workers14 min

Why vermicomposting is the most beginner-friendly Loop rig. Biology. Common problems and fixes.

Scraps Stop Leaving as Trash7 min

Coffee grounds and onion peels used to leave the house in a black bag. After the Worm Bank is running, they leave as castings — dark, crumbly, and worth more to the garden than the scrap ever was at the curb. That flip is the whole Loop domain in one bin: value that would have exited, kept and upgraded. The friction is smell, moisture, and the week you overfeed. A healthy bin is nearly odorless; a sour bin means you stuffed it like a garbage can. Bedding, air, and a steady small feed beat heroic dumps. Red wigglers do the labor. Your job is not to "manage biology." Your job is to keep conditions boring enough that they thrive. When castings start cycling into Window Farm jars or outdoor beds, the kitchen stops being a pure consumer. Waste becomes an input with a schedule. Neighbors notice less than you fear. What they might notice is that your trash can is lighter and your soil is darker.

⑥ Feeds

How this rig connects to the rest of the Ark.

← material The Shelf Stack Plant trimmings and root mass → vermicomposting feedstock
← material The Living Shelf Fish waste solids → high-nitrogen vermicomposting input
→ material The Shelf Stack Vermicast tea → foliar spray or root drench
→ material The Living Shelf Vermicast in mesh bag → potassium supplement in grow bed
← material The Window Farm Spent nutrient water (diluted, at end of a Kratky cycle) is poured into worm bedding as moisture; root balls and dead plant material go into the worm bin as feedstock
← material The Rack Farm Spent root mats and growing medium go directly into the worm bin as carbon-rich feedstock — every 7–14 days, every tray produces a root mat ready for composting; one of the most reliable Feeds in the entire Ark
→ material The Porch Garden Critical feed — vermicast top-dressed onto wicking beds 2× per year is what maintains soil fertility long-term; the Porch Garden is the largest single consumer of Worm Bank output among all Grow rigs, and without sustained vermicast soil productivity declines after year two
← material The Porch Garden All trimmings, spent plants at season end, and weeds go to the worm bin as feedstock — end-of-season cleanup produces a spike of plant matter, so the Worm Bank should be sized to absorb it
→ material The Guild Ring Vermicast as soil amendment during establishment years (1–3) when Sanctum compost may not yet be available — also useful for berry-shrub root drenches; the Worm Bank handles year-1 fertility, the Sanctum handles ongoing fertility
← material The Guild Ring Pruning debris (small twigs, leaves), fallen fruit, and seasonal plant matter from the guild floor — comfrey cuts also go here when not used as in-place mulch
→ material The Walipini Vermicast top-dressing on raised beds. Smaller volume than the Sanctum Feed but more frequent — monthly or bi-monthly applications keep bed fertility high during peak production
← material The Walipini Plant trimmings, end-of-cycle biomass, fallen leaves. Closed Loop with the Worm Bank — the Walipini's waste stream becomes the Worm Bank's feed stream becomes the Walipini's vermicast stream the next month.
← material The Living Pantry Vegetable scraps, fruit peels, coffee grounds, tea bags, eggshells — the kitchen-end of the Loop domain; daily contribution from food prep
← material Field Plot Massive biomass output post-harvest — corn stalks, bean vines, squash leaves, grain straw. The Worm Bank receives the carbon-rich fraction; the rest goes to The Sanctum or directly back to the field as mulch. Field Plot is the single largest biomass producer feeding the Loop domain at scale.
→ material Field Plot High-biology vermicompost top-dressed at planting time and around emerging seedlings. A handful per mound at Three Sisters planting inoculates the rhizosphere. The Worm Bank can't produce enough volume to fertilize Field Plot at scale alone, but its quality is irreplaceable for transplant / seedling boost.
← material The Paddock Bedding pack and droppings feed the Worm Bank, turning the herd's waste into finished compost.
← material The Hutch Surplus manure beyond bed capacity to the Worm Bank.

⑦ Field Notes

This rig, seen in the field — what running it actually taught.

Loop The Duck Pond Feeds the Beds Now We dug a pond for the ducks. A season later it was the closed-loop engine feeding the raised beds, the gravel filter, and the fish tank — nothing leaves the system. Rev 2 · Sat Jun 13

Loop · The Worm Bank · loop/worm-bank Offline? Same path on any Ark Mirror.