The most reliable sources are online worm suppliers and local garden centers
You can buy composting worms from three main sources: online retailers that specialize in worms, local garden centers and nurseries, and occasionally bait shops. Online suppliers are usually the cheapest and have the widest selection of species, but you pay for shipping. Local garden centers cost more per worm but you can inspect them before buying and avoid shipping stress. Bait shops sometimes carry red wigglers, though their stock varies and they may not know much about composting-specific care.
The species you want is red wigglers (Eisenia fetida) or European nightcrawlers (Eisenia hortensis). Red wigglers are smaller, reproduce faster, and work better in bins. European nightcrawlers are larger and burrow deeper, so they suit outdoor compost piles better. Do not buy regular garden earthworms or nightcrawlers meant for fishing—they will not thrive in a bin and will try to escape.
Key Takeaways
- Red wigglers are the standard worm for indoor composting bins; they cost between $20 and $40 per pound depending on where you buy.
- Online worm suppliers ship live worms in bedding material and usually arrive within three to five business days, though you should check the shipper's may provide if worms die in transit.
- Local garden centers and nurseries often stock worms in spring and summer but may have limited supply or higher prices than online sources.
- You need roughly one pound of worms to start a bin for a household of one to two people; add more worms if you have a larger household or generate more food scraps.
- Worms arrive in moist bedding and should be released into your bin when ready or kept in a cool, dark place for no more than a few days if you are not ready yet.
Online worm suppliers: the widest choice and usually the lowest price
Major online retailers include Worm Factory, Uncle Jim's Worm Farm, Vermicompost, and Squirm Firm. Prices typically range from $20 to $40 per pound, depending on the species and the supplier's shipping costs. Most ship worms in a small container packed with moist coconut coir or peat moss to keep them alive during transit. Shipping usually takes three to five business days, though some suppliers offer expedited options if you need them faster.
When you order, the supplier will ask how many worms you need. A standard starting amount is one pound, which contains roughly 1,000 worms and is enough for a household of one to two people composting food scraps regularly. If you have a larger household or generate a lot of kitchen waste, order 1.5 to 2 pounds. The worms will reproduce on their own once they settle in, so you do not need to buy more unless your bin grows significantly.
Check the supplier's shipping may provide before you buy. Most reputable online sellers will replace worms that arrive dead, but the policy varies—some require photos as proof, others ask you to report within 24 hours. Read the fine print so you know what to do if the box arrives damaged or the worms look unhealthy.
Local garden centers and nurseries
Many garden centers stock composting worms during spring and summer, when gardening activity peaks. Call ahead to ask whether they have red wigglers in stock and what they charge per pound. Prices are often higher than online—sometimes $30 to $50 per pound—but you avoid shipping costs and can see the worms before you buy. Look for worms that are active and moist, not dried out or sluggish.
The downside is that local stock is unpredictable. A center may have worms one week and none the next, especially in fall and winter. If your local garden center does not carry them, ask if they can order worms for you or if they recommend another nearby source. Some independent nurseries have relationships with local worm farmers and can get you worms within a few days.
Bait and tackle shops
Bait shops sometimes sell red wigglers or European nightcrawlers, since both are used for fishing. However, stock is inconsistent and staff may not know the difference between composting worms and fishing worms. If you find worms at a bait shop, ask how long they have been in stock and whether they have been kept in cool conditions—worms stored in warm shops or under lights will be stressed and may not settle into your bin well.
Bait shops are a last resort if you cannot find worms anywhere else locally, but they are worth a quick phone call if you need worms urgently and do not want to wait for shipping.
What to expect when worms arrive and how to introduce them to your bin
Worms arrive in a small box or container packed with moist bedding material. Open the box in a cool, dim place—not in bright sunlight. The worms may look sluggish or coiled up; this is normal after shipping. Do not panic if they seem inactive at first. Let them rest for 15 to 30 minutes before you handle them.
If you are ready to set up your bin, empty the entire contents of the shipping container—worms and bedding together—into your prepared bin. The bedding they shipped in is already colonized with beneficial microbes, so it helps your bin get your free guide. If your bin is not ready yet, you can keep the worms in their shipping container in a cool, dark place (around 55 to 77 degrees Fahrenheit) for up to a week. Keep the bedding moist but not waterlogged, and do not feed them until they are in the bin.
Once the worms are in the bin, wait three to five days before adding food scraps. This gives them time to adjust to their new environment and explore the bedding. After that, start with small amounts of food—a small handful of vegetable scraps or coffee grounds—and increase gradually as the worms settle in and the population grows.
How many worms you actually need
The standard rule is one pound of worms per household member, or one pound for every pound of food scraps you generate per week. A pound contains roughly 1,000 red wigglers. For most households, one pound is enough to start. The worms will reproduce every 60 to 90 days under good conditions, so your population will double or triple within six months without you buying more.
If you have a large household, run a restaurant, or compost a lot of yard waste, you may want to start with 1.5 to 2 pounds. But do not feel pressured to buy more than you need—worms are prolific breeders, and you will quickly have too many if you start with too many and do not have enough food for them to eat.
Cost comparison: online versus local
| Source | Price per pound | Shipping | Delivery time | Best for |
|---|---|---|---|---|
| Online worm suppliers | $20–$40 | $10–$20 | 3–5 business days | Budget-conscious buyers, specific species |
| Local garden centers | $30–$50 | None | Same day or next day | Urgent need, want to inspect before buying |
| Bait shops | $25–$45 | None | Same day | Emergency backup only |
Frequently Asked Questions
Can I dig up worms from my garden instead of buying them?
Garden worms are usually the wrong species—they are adapted to soil, not bins, and will try to escape. Stick with red wigglers or European nightcrawlers bred for composting. They cost less than you might think, and you will have better results.
What if the worms arrive dead?
Contact the supplier within 24 hours with photos if they ask for them. Most reputable online sellers will replace dead worms at no charge or refund your money. Keep the shipping container and bedding as proof. If you bought from a local source, return them with your receipt.
Do I need to acclimate worms to my bin gradually?
No. You can empty the entire shipping container into your bin right away. The worms will adjust on their own. Just avoid adding food for the first few days and keep the bin in a cool, dark place while they settle.
How long do composting worms live?
Red wigglers live four to five years in good conditions. They reproduce constantly, so your population will stay stable or grow even as individual worms age. You rarely need to buy more worms after your first batch.
Can I buy worms in winter?
Online suppliers ship year-round, though some may pause shipping during extreme cold to avoid worms freezing in transit. Local garden centers rarely stock worms in winter. If you need worms in cold months, order online and check the shipper's winter policy before you buy.