Worm Castings Near Me: Prices, Bulk Rates and Buying Guide

To find worm castings near me, start with a worm farm, a bulk soil yard or an independent garden center within delivery range, then ask each seller for a lab test and a price per pound. One US seller’s list prices on 5 November 2026 ran from about US$0.76 per pound for a large tote to US$1.47 per pound for a small bag, using Fedco’s own weights. This guide shows how to compare local sellers, how much to buy and when bulk pays.

Use the calculator below to test bags against a delivered load. The charts show what the research found on plant growth and what one producer says bulk castings cost.

Worm castings near me: where to look first

Local supply is patchy, so check several kinds of seller. Each has different strengths.

1. Worm farms. Best for: fresh product and direct questions about feedstock. Ask whether you can collect, as pickup can save a lot of money.
2. Bulk soil and landscape yards. Best for: loads of a cubic yard or more. GreenWaste listed castings at US$239.99 per cubic yard in Sacramento on 5 November 2026, with its Bay Area yard sold out, which shows how stock can differ between yards of one firm.
3. Independent garden centers and nurseries. Best for: small bags you can see before you pay.
4. Farm supply stores and co-ops. Best for: growers who already order inputs by the pallet.
5. Farmers markets and gardening groups. Best for: small lots and local leads. Prices vary widely here. One producer’s guide says resellers can charge US$5 per pound or more at markets.
6. Mail-order sellers. Best for: anyone with no local supplier. Compare the delivered price, because freight can exceed the price gap between sellers.

Search terms differ by region. In the UK, “wormery compost” and “vermicompost” can bring up sellers that “worm castings” misses. In Australia and New Zealand, try “worm farm castings”. For a farm-scale order, phone the seller. Some bulk prices are quoted, not posted.

What worm castings means

Worm castings are the digested material that composting worms leave behind. Oregon State University Extension explains that the common red wiggler (Eisenia fetida) turns food waste and other organic matter into this product, also called vermicast. It also notes that vermicast is a mix of castings and decomposed organic matter. So a bag sold as vermicompost and one sold as pure castings may differ. Ask what is in it.

Worm castings for sale: what prices look like

Sellers quote by quart, bag, cubic yard or ton, which makes comparison hard. Convert every quote to a price per pound. Fedco Seeds gives weights that make this possible: about 67 quarts per 100 pounds, and up to 2,900 pounds in a 3 cubic yard tote.

Chart

Bulk price ranges by type of producer

US$ per cubic yard before shipping, one producer’s estimate, October 2021

Fedco and GreenWaste prices were read on 5 November 2026. The Fedco per-pound figures are our arithmetic from Fedco’s product page. The tote figure uses the top weight of 2,900 pounds, so its true price per pound may be a little higher. These are asking prices from single sellers, not a market average.

The Urban Worm Company bulk buyer’s guide (October 2021) puts bulk castings at US$225 to over US$800 per cubic yard before shipping. It says a large outdoor producer can work at US$225 to US$400, while a small indoor producer might need US$600 or more. This is a seller’s view and the guide is several years old, so use it as a rough frame and get current quotes.

Freight is the wild card. The same guide reports a quote of a little over US$490 to ship one pallet within California, and nearly US$50 less for a much longer haul to Illinois. Distance alone did not set the price. Check whether the delivery address needs a truck with a lift gate, because that can change the cost too.

Chart

List price per pound falls as pack size grows

US$ per pound, list or stated prices, single sellers, not a market average

Bags or a bulk load: run your own numbers

Bags cost more per pound, but you buy just what you need. A bulk load adds delivery and may leave you with more than you can use. Enter a local quote for each below.

Try the numbers for your own farm below.

How to judge a local seller

There is no single quality standard for castings, and the color tells you little. Good product can be cocoa brown rather than black. Ask these questions before you pay.

• Is there a recent lab report? Urban Worm’s guide suggests at least percent solids, organic matter, pH, soluble salts, total nitrogen, phosphorus, potassium, total carbon and the carbon-to-nitrogen ratio.
• What did the worms eat? Feedstock shapes nutrient content and food-safety risk. Ask for type and source.
• How long was it processed? USDA guidance describes outdoor windrows usually run for 6 to 12 months and indoor container systems usually for 2 to 4 months.
• What is the moisture? Wet castings weigh more, so a per-pound price can hide water. Compare on percent solids if you can.
• Is it screened? Finer product is easier to use in seed mixes. Ask for a sample.
• Does the batch stay consistent? One test covers one sample. Ask for reports from more than one batch if you will buy repeatedly.

Organic certification

Certified growers need more than a word on a bag. USDA National Organic Program guidance NOP 5021 accepts vermicomposting when allowed feedstocks are used, aerobic conditions are kept with moisture at 70-90%, and it runs long enough that the product does not contaminate crops, soil or water. Certifiers should review commercial makers’ methods and source materials. OMRI’s product lists show inputs it has reviewed for organic use, and OMRI’s compost standards article explains how the rules apply. Get your certifier’s approval before you apply a new input. Outside the US, check your own national organic scheme.

Brut worm castings and other labels

Brut is a brand, not a grade: Brut Worm Farms is a US company that sells worm castings in bags. Words such as “premium” or “pure” are not defined grades either, so they tell you nothing measurable. Treat a Brut product like any other: ask for the feedstock, the lab report and the price per pound. Fedco notes that the benefits it describes are lost if castings are sterilized, and sells non-sterile product. That is a seller’s claim, and it is also why the food-safety questions below matter.

What castings do for plants, and what they do not

One broad summary is a 2019 meta-analysis by Blouin and colleagues in Agronomy for Sustainable Development. On average, vermicompost raised commercial yield by 26% and total biomass by 13%. Effects peaked when it made up 30-50% of soil volume, and cattle manure was the best starting material. The authors warn that studies with large effects were over-represented, so these averages may run high.

Chart

Average plant response to vermicompost

Mean % increase against controls, across studies in a meta-analysis

Those are averages across field, greenhouse and climatic chamber studies, and a 30-50% share of soil volume is far above what a field can afford. The effect was also stronger when no fertilizer was added. Do not expect the same result from a light top-dressing.

Castings are a low-analysis product. Fedco’s average analysis is 0.5-0.5-0.3. So 100 pounds carries about half a pound of total nitrogen, and just part of that is available to the crop in the first season. Urban Worm also says castings will not have the high macronutrient levels of synthetic fertilizers. Think of them as a soil amendment that adds organic matter and some nutrients, not as a full replacement for a crop’s fertilizer plan.

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How much to buy and how to use it

Published rates differ, so test on a small area first. These figures come from named sources.

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• Garden beds. Fedco suggests 100 pounds, about 67 quarts, per 1,000 square feet.
• Potting and seed mixes. Fedco cites Ohio State research favoring 10-20% castings by volume, with less benefit at greater amounts. Urban Worm says castings tend to be no more than 20% of a growing medium. Blouin’s 30-50% peak is a research finding, not a buying guide, so start near 10-20%.
• Transplants and young trees. Mix a measured amount into the planting soil and record it, so you can compare with untreated plants.
• Field crops. Base the rate on a soil test and a lab analysis of the product.

Why field-scale use is a cost question

Fedco’s garden rate works out to about 4,356 pounds per acre, or 2.2 short tons. At Fedco’s own weight of roughly 967 pounds per cubic yard, that is about 4.5 cubic yards. At the US$225 to US$800 range above, it comes to roughly US$1,000 to US$3,600 per acre before freight, for about 22 pounds of total nitrogen. That can make sense for high-value vegetables, nursery stock or transplant holes. It is hard to justify across broadacre grain.

Washington State University’s compost guide for farmers offers a worksheet for this. It starts with the crop’s nitrogen need and the product’s lab analysis, then applies a plant-availability figure. It also warns that you may need to base rates on phosphorus to avoid a buildup in the soil. The worksheet is written for compost, so treat its availability figure as a starting point for castings and get local agronomy advice.

Food safety on produce farms

Castings can come from manure, so handle them as an animal-origin input. Vermont’s produce safety guidance lists worm castings among animal-source amendments that can carry pathogens such as Salmonella or E. coli. It advises knowing your source, storing amendments away from growing areas, keeping as long a gap as you can before harvest and limiting contact with the edible part of the crop.

US produce growers covered by the federal Produce Safety Rule should note how it defines treatment. 21 CFR 112.54 accepts scientifically valid controlled processes and gives thermal composting examples at 131°F. Vermicomposting runs cooler: USDA’s guidance says temperatures above 95°F kill the worms. So ask the seller what validated process or test supports the product, and check with your produce-safety contact.

Take extra care with tea. University of Hawaiʻi guidance for home gardeners (March 2011) warns that human pathogens can be found in teas made from castings, and advises keeping untested tea off the edible part of the crop, especially near harvest. Check local rules and get professional advice before use on food crops.

Composting worms for sale near me: making your own

If your local price is high, or nobody nearby sells castings, you can raise worms instead. Oregon State’s guide gives clear sizing rules, written for household bins:

• Stock. About 1,000 worms make a pound, and you need Eisenia fetida. Check the species with the seller.
• Space and feed. Allow about 1 cubic foot of bin and 1 pound of food waste per week for each pound of worms.
• Temperature. Red wigglers tolerate 40°F to 90°F and do best between 55°F and 77°F. Below 50°F they feed less.
• Moisture. Bedding should hold 75-85% moisture and feel like a wrung-out sponge.
• Time. Finished compost takes about three to six months from setup. Harvest at least twice a year.

Sellers of worms are often the same farms that sell castings, so ask about both. Check with local farm supply stores, regional farmers markets and urban composting groups, and ask about a bulk price for a larger system.

A home bin will not supply a farm. Field-scale systems need more planning for labor, feedstock, weather and records. NOP 5021 says certified growers should record the type and source of feedstock, plus a duration log when animal materials are used. Work out what you could buy for the same money before you build.

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Do castings pay compared with other fertilizers?

Compare the cost of what you actually need. If nitrogen is the limit, price each option per pound of plant-available nitrogen using a current quote. At 0.5% total nitrogen and US$0.76 per pound, castings cost about US$152 per pound of total nitrogen. Priced on nitrogen alone, that is a high figure, so run the same sum on your fertilizer quote.

The case for castings rests on the other things: organic matter, ease of use in mixes and acceptance in organic systems when the product qualifies. Use them where a small amount matters, such as seedlings, transplants and containers. Then measure your own result with a side-by-side strip. To check a larger trial, Farmonaut’s satellite crop monitoring can show vegetation change across treated and untreated areas. It will not tell you the cause, so pair it with field notes and yield records.

Related pages on our site: field monitoring apps, farm administration tools, product traceability, farm fleet logistics, carbon footprint tracking, satellite data API, API developer docs.

FAQ

How do I find worm castings near me?

Call worm farms, bulk soil yards and independent garden centers within delivery range. Ask each for a lab report, the weight per cubic yard and a delivered price, then compare per pound.

How much do worm castings cost?

List prices we read on 5 November 2026 ranged from about US$0.76 to US$1.47 per pound at one seller, by pack size. One producer’s 2021 guide put bulk at US$225 to over US$800 per cubic yard before shipping.

What does worm castings mean?

It means the digested material left by composting worms, also called vermicast. Oregon State describes vermicast as a mix of castings and decomposed organic matter, so ask what a product contains.

How do I use worm castings in an organic vegetable garden?

Fedco suggests 100 pounds per 1,000 square feet of bed, and 10-20% by volume in potting mixes. Check that the product is acceptable to your certifier if you are certified, and keep it off edible parts near harvest.

Are worm castings a complete fertilizer?

No. An analysis such as Fedco’s average of 0.5-0.5-0.3 is low, so heavy-feeding crops usually need another nutrient source. Use a soil test to set the plan.

Is buying local better than shipping in?

Local supply can cut freight and lets you visit the seller and see the process. Judge it on delivered price and quality.