Can Wool Stop Snails and Slugs From Invading Your Garden? What Experts Think

Snails and slugs can cause plenty of damage in your garden. They munch on plant foliage, create irregular holes in leaves, ruin fruit, and disrupt growth. And while they may provide some soil benefits, this often doesn't make up for their more destructive habits.

Many gardeners look for natural solutions to this problem so they don't have to use harsh chemicals. Wool is one such suggestion—but can it really prevent snails from invading? We reached out to experts for their advice.

Does Wool Stop Snails and Slugs?

As with many DIY gardening tricks, using wool to stop snails and slugs might work, but it also might not. There are anecdotal examples suggesting that the rough fibers of natural wool are unappealing to these soft-bodied animals, who will then divert their paths away.

When placed around the bases of vulnerable plants, wool is said to be one of several natural options that might deter these common pests. However, "It's supposed to be effective when bolstered by using tried and true methods—which work very well on their own," says gardening coach and author Teri Speight.

Thankfully, there are plenty of other techniques that are even more effective. 

Downsides of Wool in the Garden

As nice as the idea might seem, there are some definite reasons why you might not want to place wool in the garden. 

• Aesthetics: It's not visually appealing, says Speight, adding that wool in the garden can also harbor other pests.
• Additional work: "The biggest drawback to me would be checking and remembering to remove the ring of wool at the proper time while avoiding damaging plant material," says Speight. "Technically the wool will break down by the end of the season—but there are other methods that are more cost effective."

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How to Use It

If you're still absolutely sold on the idea of trying wool, then you can certainly give it a go. You might explore the option of wool pellets, which are specifically designed for garden use. These pellets decompose naturally in the garden, providing a small nitrogen source for the soil, retaining water like mulch, and possibly providing a snail deterrent.

Alternatives to Try

If snails and slugs are plaguing your garden, don't worry! Here are some alternative methods to try. 

Copper

The reactive nature of copper can interact with the snail's electrolyte-rich mucus, which then creates a tiny electric shock similar to the way a battery functions. Copper strips are available solely for this purpose.

"This has been a longstanding slug deterrent in my shade garden. It disappears when the foliage in the garden fills out," says Speight.

Beer Traps

Beer is another viable option. Snails and slugs are attracted to the smell and the yeast, and they will fall into the trap when they try to reach the place where the odor is coming from. Check and empty the traps frequently. 

Abrasive Materials

Snails and slugs tend to avoid crossing abrasive materials, so incorporating them in your garden can be an effective deterrent. "I often recommend crushed eggshells or diatomaceous earth as alternatives to wool," says gardening author Kathy Jentz.

Eggshells in particular are an easy and readily available option. "The eggshells don't have to be replaced after raining, which is an added benefit of reusing what would otherwise be discarded," says Speight.

She also suggests ash. "When I had a wood stove and was using my fireplace, the wood ash was never wasted," she says. "I would incorporate it at the edges of the garden and the slugs found it irritated their undersides when they tried to cross over it."