Homemade Squirrel Repellents: Pepper Spray and DIY Barriers

The best homemade squirrel repellent is a hot pepper spray or a dusting of cayenne on soil and bulbs, which squirrels dislike, but it washes off with rain and works for days, not weeks. Peppermint, vinegar, garlic, coffee grounds and dryer sheets have even less behind them. The DIY fixes that last are physical: chicken wire or hardware cloth over beds and bulbs, metal bands on tree trunks and a homemade baffle under the bird feeder.

Do Homemade Squirrel Repellents Work?

A little, for a short time. University of California IPM's pest note on tree squirrels describes the effectiveness of chemical repellents as questionable, and kitchen remedies are weaker and wash away faster than commercial products. Squirrels also learn quickly: a smell that makes one hesitate on Monday is often ignored by Friday, especially if buried nuts or bulbs are waiting underneath.

Hot pepper is the exception worth trying. Capsaicin irritates a squirrel's mouth and nose, so a fresh coating can stop digging in a pot or bed for a few days while seedlings get established. Use it as a short bridge, and put your real effort into barriers that squirrels cannot get past.

For store-bought options and barriers, see our guide to the best squirrel deterrents, and the squirrel deterrent section has guides for gardens, attics and sprays.

Homemade Squirrel Remedies Compared

Pet hair and human hair sprinkled around beds are also popular; there is no good evidence for them, and they blow away quickly.

How to Make a Hot Pepper Squirrel Spray

1. Mix the base: stir a tablespoon or two of cayenne powder or a generous splash of hot sauce into a quart of warm water.
2. Help it stick: add a few drops of plain dish soap or a teaspoon of vegetable oil so it clings to leaves and soil.
3. Let it steep and strain: leave it overnight, then strain through a coffee filter so flakes do not clog the nozzle.
4. Test first: spray a few leaves and wait a day for burn spots before treating whole plants.
5. Spray the right spots: soil over bulbs, the rims of pots and the base of plants squirrels dig, not open flowers.
6. Reapply: after rain or watering and every few days while squirrels are active.

Wear gloves and eye protection, and wash your hands before touching your face. Keep the spray away from where children and pets play, and rinse vegetables from treated beds well before eating them. Do not spray bird feeders with homemade mixes; adding pepper to seed is a different method, and birds that eat treated seed are not affected by the heat the way squirrels are.

DIY Barriers That Work Better Than Repellents

• Wire over beds: UC IPM suggests one-inch hexagon chicken wire to cover rows of seeded or established crops; pin it down with landscape staples and lift it once plants are established.
• Bulb cages: line a planting hole with hardware cloth and fold it over the top, or lay a sheet flat over the bed under mulch; shoots grow through the mesh.
• Pot toppers: cut a circle of hardware cloth to sit on the soil of each container, with a hole for the stem.
• Tree trunk bands: wrap isolated fruit and nut trees with a wide band of smooth sheet metal, held with wire and springs so the trunk can grow, and trim branches that let squirrels jump in.
• Homemade feeder baffle: slide a length of wide stovepipe or a large plastic bucket, upside down, onto the feeder pole below the feeder.
• Netting: bird netting over ripening tomatoes and berries keeps squirrels from snatching fruit.

Barriers take an afternoon to build but keep working through rain and seasons, which no kitchen remedy does. If you would rather buy than build, ready-made hardware cloth rolls, pole baffles and motion sprinklers do the same jobs with less cutting.

Common Questions About Homemade Squirrel Repellents

Key Takeaways

• Hot pepper on soil or as a spray is the homemade repellent most worth trying, but it lasts only days and washes off in rain.
• Peppermint, vinegar, garlic, coffee grounds and dryer sheets have little or no evidence behind them.
• Skip bone meal and blood meal at planting time, since they invite digging by squirrels, dogs and raccoons alike.
• Judge any remedy within a week; if digging continues, switch to wire.
• Chicken wire, hardware cloth, pot toppers, tree bands and baffles keep squirrels out far longer than any scent.
• Wear gloves and eye protection with pepper sprays and keep them away from children, pets and flowers.