Garden spiders are overwhelmingly beneficial. They eat a wide range of pest insects, they pose almost no threat to people, and they cost you nothing. If you’ve spotted a large, colorful spider sitting in a circular web among your plants, you’ve gained a free, full-time pest control worker.
What Garden Spiders Actually Eat
The spiders most people call “garden spiders” are orb weavers, a group that builds the classic circular webs you see strung between plants, fence posts, and garden stakes. These webs are insect traps. Grasshoppers, gnats, mosquitoes, flies, moths, beetles, and aphid-eating parasitic wasps’ prey all end up stuck in the silk. When something lands, the spider bites and paralyzes it, wraps it in silk, and consumes it. A single orb weaver web can be covered in dozens of caught gnats by evening.
But orb weavers aren’t the only spiders working your garden. Jumping spiders are small, hairy, sometimes iridescent hunters that stalk and pounce on prey during the day without using webs at all. Wolf spiders patrol the ground at night, running down insects among the soil and mulch. Funnel weavers spin thick, flat webs close to the ground and ambush anything that touches the surface. Even tiny dwarf spiders, barely visible, produce sheet-like webs across plant surfaces and hunt during daylight hours. Together, these species cover different zones of your garden (air, foliage, ground) and different times of day, creating overlapping layers of pest suppression.
How Much Pest Control They Provide
Spiders are generalist predators, meaning they don’t specialize in one type of insect. This is actually an advantage. A garden spider will eat whatever stumbles into its web or crosses its path, so it controls populations of multiple pest species simultaneously. Unlike a targeted pesticide that kills one type of bug, spiders reduce the overall insect pressure in your garden around the clock.
They’re also self-sustaining. You don’t need to reapply them, feed them, or maintain them. As long as there are insects to eat, garden spiders will stay. And because they’re part of the broader food web (mud dauber wasps, for instance, collect juvenile orb weavers to feed their own developing larvae), their presence signals a healthy, functioning ecosystem in your yard. A garden full of spiders is a garden where the natural checks and balances are working.
Are Garden Spiders Dangerous?
The black and yellow garden spider, one of the largest and most commonly spotted species in North American gardens, is essentially harmless. Despite its intimidating size (females can have a leg span of several inches), this spider will generally flee rather than confront you. When disturbed, it may shake its web rapidly as a warning display or drop off the web entirely onto nearby vegetation or the ground to escape. Biting is a last resort, typically happening only if the spider is physically grabbed or pinned against skin, and the bite is comparable to a bee sting with no medically significant venom.
This pattern holds for the vast majority of garden spiders. Orb weavers, jumping spiders, funnel weavers, and wolf spiders are all non-aggressive toward humans. They have no reason to bite you, and their fangs are designed for insects, not people. The two medically significant spiders in North America, the black widow and the brown recluse, are reclusive species that rarely set up shop in the open, sunny spots where garden spiders thrive.
Identifying Common Garden Spiders
Knowing what you’re looking at can help you feel more comfortable sharing your garden with these animals.
- Orb weavers: Large, colorful spiders that sit in the center of circular webs or hang nearby. The black and yellow garden spider (Argiope aurantia) is the most recognized, with bold yellow and black markings on a large abdomen. Their webs often feature a thick zigzag pattern of silk down the center called a stabilimentum.
- Jumping spiders: Small, compact, and hairy with large forward-facing eyes. They don’t build webs and are often seen on sunny walls, fences, or plant leaves during the day.
- Wolf spiders: Medium to large with long hairy legs, found running along the ground rather than in webs. They’re fast and can look alarming, but they’re harmless.
- Funnel weavers: Build thick, flat webs with a funnel-shaped retreat at one end, often near ground level in shrubs or along foundations.
- Cellar spiders: Long, skinny legs, hanging upside down in dark corners. More common indoors but sometimes found in shaded garden structures.
Living Alongside Garden Spiders
The simplest approach is to leave them alone. A garden spider in an out-of-the-way spot will quietly eat pests all season and ask nothing of you. Avoid spraying broad-spectrum insecticides in areas where spiders are active, since these chemicals kill spiders along with everything else and remove a layer of natural pest control that’s hard to replace.
If a spider has built a web directly across a walkway or doorway, you can relocate it, but do so carefully. Web-building spiders are vulnerable without their webs. If you simply knock one to the ground, it’s exposed to predators and has to expend significant energy building a new web from scratch. A better approach is to use a stick or piece of cardboard to gently carry the spider, with some web still attached, to a nearby shrub or garden structure where it can re-establish. Most orb weavers will have a new web built within a day.
You can also encourage garden spiders by providing the kind of habitat they prefer: diverse plantings with varying heights, some areas of undisturbed mulch or leaf litter for ground-dwelling species, and structures like trellises or stakes that give orb weavers anchor points for their webs. A slightly “messier” garden with structural variety will support more spiders than a perfectly manicured one.