It's one of the most frequently asked questions in the worm composting world: "Should I use Red Wigglers or Nightcrawlers for vermicomposting?"
At Wired Worm Farm, we raise both species, and we get this question from customers almost daily. The answer depends on what you're looking for in a composting worm — but let's lay out all the facts so you can make an informed decision.
First, an important clarification: when we say "Nightcrawlers" in the context of vermicomposting, we're talking about European Nightcrawlers (Eisenia hortensis), NOT Canadian Nightcrawlers (Lumbricus terrestris). Canadian Nightcrawlers are deep-burrowing worms that do not work in compost bins. European Nightcrawlers are surface-dwelling composting worms that happen to also be excellent fishing bait.
Now let's compare them across every category that matters.
Composting Ability
Red Wigglers
Red Wigglers are the world champion composting worm. They are specifically adapted to living in and processing decaying organic matter. They consume approximately half their body weight in food per day and do so efficiently and consistently.
In a well-maintained bin, Red Wigglers will tear through your fruit and vegetable scraps, coffee grounds, and paper bedding at an impressive rate. Their small size actually works to their advantage here — more individual worms means more surface area coverage and faster processing.
Rating: ★★★★★
European Nightcrawlers
European Nightcrawlers are good composters, but they're not quite as single-mindedly efficient as Red Wigglers. They tend to eat a bit more slowly and may focus on the bedding material as much as the food scraps. Their larger size means fewer individual worms per pound, which means less surface area coverage.
That said, they absolutely do compost effectively. Many worm farmers use Euros successfully as their primary composting worm.
Rating: ★★★★
Reproduction Rate
Red Wigglers
Red Wigglers reproduce fast. Under ideal conditions:
- Each mature worm produces 2–3 cocoons per week
- Each cocoon hatches 3–5 baby worms
- Population can double every 60–90 days
This rapid reproduction means your composting capacity grows quickly without additional purchases.
Rating: ★★★★★
European Nightcrawlers
Euros reproduce at a slower pace than Red Wigglers. Their cocoons tend to contain fewer embryos, and the time to sexual maturity is a bit longer. Population growth is steady but noticeably slower.
If you're trying to grow your worm population quickly for maximum composting power, Red Wigglers have a clear advantage.
Rating: ★★★
Castings Quality
Red Wigglers
Red Wiggler castings are exceptionally high quality — rich in nutrients, teeming with beneficial microorganisms, and excellent for plant growth. They are the standard by which all vermicompost is measured.
Rating: ★★★★★
European Nightcrawlers
European Nightcrawler castings are also excellent quality. Some worm farmers claim there are subtle differences in nutrient profiles, but in practical terms, both species produce castings that are outstanding for gardens.
Rating: ★★★★★
Fishing Bait Performance
Red Wigglers
Red Wigglers work as fishing bait, particularly for panfish, trout, and other small to medium species. However, their small size makes them less appealing for anglers targeting larger fish. They're also softer-bodied and may not stay on the hook as well as larger worms.
Rating: ★★
European Nightcrawlers
This is where Euros really shine. European Nightcrawlers are top-tier fishing bait. They're large (4–6 inches), thick, meaty, and durable on the hook. They stay alive in water longer and attract a wider range of fish species, from bass to catfish to walleye.
If you want a worm that composts AND serves as premium fishing bait, European Nightcrawlers are the clear winner.
Rating: ★★★★★
Temperature Tolerance
Red Wigglers
Red Wigglers thrive between 55°F–80°F and can survive down to about 40°F. They're vulnerable to extreme heat (above 90°F) and extreme cold (below freezing).
Rating: ★★★
European Nightcrawlers
Euros have a slightly wider temperature tolerance, performing well from about 50°F–80°F and generally handling cooler temperatures a touch better than Red Wigglers. This makes them a good choice for composters in cooler climates.
Rating: ★★★★
Garden Integration
Red Wigglers
Red Wigglers are not well-suited for living in garden soil. They need concentrated organic matter to survive and won't thrive if released into a standard garden bed. They're best kept in a dedicated worm bin.
Rating: ★★
European Nightcrawlers
Euros can survive and benefit garden soil when added to well-mulched garden beds. They'll burrow into the top layers, aerate the soil, and continue producing castings right in the root zone. This dual-functionality is a significant advantage.
Rating: ★★★★
Our Verdict
For pure vermicomposting: Red Wigglers are the best choice. They eat more, breed faster, and are the easiest composting worm for beginners.
For versatility (composting + fishing + garden): European Nightcrawlers can't be beat. They do everything reasonably well and excel as fishing bait.
The best approach? Many experienced worm farmers — including us at Wired Worm Farm — use both species together. Red Wigglers dominate the upper layers of the bin, processing food scraps aggressively, while European Nightcrawlers work slightly deeper. It's a complementary partnership that maximizes composting efficiency and gives you bait worms whenever you need them.
You truly can't go wrong with either choice.
Get Your Composting Worms From Wired Worm Farm
Whether you choose Red Wigglers, European Nightcrawlers, or both, Wired Worm Farm has you covered. We raise healthy, active composting worms and ship them right to your doorstep.