The most reliable sources are online worm suppliers and local garden centers
You can get composting worms from three main places: online retailers who ship live worms in the mail, local garden centers and nurseries, and occasionally from other composters in your area. Online suppliers are the most consistent option because they specialize in worms and know how to pack them safely for transit. Local garden centers may carry them seasonally, usually spring through early fall. The worms you need are almost always red wigglers (also called red worms or Eisenia fetida) or European nightcrawlers — not the earthworms you dig up in your yard, which won't thrive in a bin.
Most people start with 1 pound of worms, which is roughly 1,000 individual worms. That's enough to process food scraps from a household of two to four people. If you have a larger bin or more food waste, you may want 2 pounds to start. The worms will reproduce on their own over time, so you don't need to buy more unless something goes wrong.
Key Takeaways
- Red wigglers and European nightcrawlers are the two species that work in home compost bins; regular earthworms will not.
- Online worm suppliers ship live worms in bedding material and usually arrive within three to five business days of ordering.
- One pound of worms (about 1,000 individuals) is a standard starting amount for a household compost bin.
- Worms cost between $25 and $50 per pound depending on the supplier and shipping distance.
- Local garden centers and nurseries sometimes carry worms in spring and summer, which saves on shipping costs and lets you inspect them before buying.
Online worm suppliers: what to expect and how to order
The largest online suppliers include Worm Factory, Uncle Jim's Worm Farm, and Vermicompost.com. These companies keep worms in stock year-round and ship them in a breathable container packed with moist bedding — usually coconut coir or peat moss. The worms arrive alive and ready to go into your bin. Shipping typically takes three to five business days, though some suppliers offer expedited options if you need them faster.
When you order, you'll choose the species (red wigglers are the standard choice for most home bins), the quantity in pounds, and sometimes the bedding type. The supplier will ask for your shipping address and may ask you to confirm you're home or nearby when the package arrives, since live worms shouldn't sit in a hot mailbox for hours. Most suppliers include care instructions with the shipment.
Cost varies by supplier and distance, but expect to pay $30 to $50 per pound plus shipping. Shipping can add $10 to $25 depending on how far the worms travel and whether you choose standard or faster delivery. Some suppliers offer discounts if you order multiple pounds at once.
Local garden centers and nurseries
Many garden centers stock composting worms during the growing season, typically April through September. Call ahead before you visit — not every location carries them, and stock runs out quickly in spring. The advantage of buying locally is that you avoid shipping costs (usually $15 to $25 saved) and you can see the worms before you buy them. You can check that they're active, that the bedding is moist but not waterlogged, and that the container doesn't smell like ammonia, which would indicate stress.
Prices at garden centers are often similar to online suppliers — $30 to $50 per pound — but without the shipping fee. Some centers will also let you ask questions about their worms' origin and how long they've been in stock, which can help you choose a healthy batch.
Finding worms from other local composters
Community composting groups, local gardening clubs, and neighborhood Facebook groups sometimes have members who breed extra worms and sell them informally. This is usually the cheapest option — often $15 to $30 per pound — and the worms are already adapted to your local climate. You can also ask if the person has information specific to your area.
The downside is availability. You may have to wait for someone to have worms available, and you won't have the same guarantees you'd get from a commercial supplier. If something goes wrong with the worms, you have no recourse. This option works best if you know someone personally or can find a trusted recommendation through a local gardening group.
What to do when the worms arrive
Open the package as soon as it arrives and check that the worms are alive and the bedding is moist. They should be moving around, though they may be sluggish from the journey. Don't be alarmed if they seem inactive at first — they'll perk up once they settle into your bin.
Let the worms acclimate to your bin gradually. Place the unopened bedding container inside your bin and leave it for a few hours, or gently mix the worms and their shipping bedding into the bin's existing bedding. This prevents temperature shock. Then feed them lightly — a small handful of food scraps — and let them settle for a few days before adding more food. They need time to adjust to their new home before they're ready to process large amounts of waste.
Keep the bin moist, dark, and between 55 and 77 degrees Fahrenheit during the adjustment period. The worms will burrow into the bedding and start eating within a few days.
Choosing between red wigglers and European nightcrawlers
Red wigglers are the standard choice for most home bins. They're smaller, reproduce quickly, and thrive in the warm, moist conditions of a compost bin. They also tolerate crowding better than other species. If you're new to worm composting, start with red wigglers.
European nightcrawlers are larger and eat more food per worm, so you need fewer of them. They're a good choice if you have a lot of food waste or prefer a smaller worm population. However, they're pickier about temperature and moisture, and they don't reproduce as quickly. They cost more per pound and are less widely available. Most online suppliers carry both, so you can choose based on your bin size and feeding volume.
Seasonal timing and availability
Worms are easiest to find and ship in spring and fall when temperatures are moderate. Summer heat can stress worms in transit, and winter cold can kill them. Most online suppliers continue shipping year-round but may add extra insulation or ice packs in summer and heat packs in winter, which increases shipping cost.
If you're ordering in July or January, expect to pay more for expedited shipping or temperature-controlled packaging. If you can wait, ordering in April or September will save you money and reduce the risk of worms arriving stressed. Local garden centers have the most stock in May and June, so that's the best time to check in person.
Frequently Asked Questions
Can I use earthworms from my yard instead of buying composting worms?
No. Garden earthworms burrow deep and need soil, so they'll try to escape a compost bin and won't eat the food scraps efficiently. Composting worms like red wigglers live in the top few inches of soil and are adapted to high-density environments. They're different species and won't do the same job.
How long do worms take to arrive after I order?
Most online suppliers ship within one business day and delivery takes three to five days. Some offer expedited shipping that arrives in two to three days, but it costs more. Check the supplier's shipping timeline before you order if you're in a hurry.
What if the worms arrive dead or stressed?
Reputable online suppliers may provide live arrival and will replace dead worms or refund your money. Check the supplier's may provide policy before you order. Keep the original packaging and photos as proof if you need to file a claim. Local suppliers usually won't offer this may provide, so inspect the worms carefully before you leave the store.
Do I need to buy worms every year?
No. Worms reproduce in the bin and their population will grow over time. You only need to buy more if disease or escape wipes out your population, which is rare if you maintain proper moisture and feeding. One initial purchase usually lasts for years.
Can I order worms in winter?
Yes, but it's riskier and more expensive. Cold temperatures stress worms during shipping, so suppliers add heat packs and insulation, which raises the cost by $10 to $20. If possible, wait until spring to order. If you must order in winter, choose a supplier close to you to minimize transit time.