How to Freeze Your Winter Knitwear for Moth Prevention

Materials you'll need

Step 1 — Freeze your sweaters

The most effective way to eliminate moth eggs and larvae hiding in your knitwear is to freeze them. Start by washing and drying each sweater according to the manufacturer's instructions — they must be completely clean before freezing. Place each sweater into a plastic zipper bag, press out as much air as possible, and seal tightly. Store the bags in your freezer for at least two weeks. Once done, remove each sweater gently and allow it to air dry fully before moving on to long-term storage.

Step 2 — Add extra moth deterrents

Freezing is highly effective but pairing it with additional deterrents gives you extra protection. Place cedar blocks in your closet or storage area — they naturally repel moths without the overpowering scent of mothballs. If you opt for mothballs, be aware the smell can be strong. Avoid storing sweaters in cedar chests long-term, as the wood itself can attract moths over time. Check your stored knitwear regularly for any signs of moth activity and address issues promptly.

Step 3 — Store your knitwear safely

For long-term storage, place your sweaters in airtight containers such as vacuum-sealed bags or plastic storage boxes. This keeps moths out and protects the fabric from dust and moisture. Gather everything worth saving — from cherished handmade heirlooms to everyday favourites — and store them together so nothing gets overlooked at the start of next winter.

Step 4 — Care for pets and plants

If you share your home with pets, keep stored knitwear in closed containers or on high shelves out of reach. Use pet-friendly deterrents like bitter apple spray around your storage area to discourage curious cats or dogs. Choose natural fibers wherever possible and contact your vet immediately if you suspect a pet has ingested anything harmful. If you have an oxalis plant, move it indoors before the first frost — keep it in a cool spot with indirect light and water sparingly to prevent root rot.

Frequently asked questions

How can I prevent moth infestations in my winter knitwear during storage?
Freeze your sweaters for at least two weeks by washing them first, placing each one in a sealed plastic zipper bag with no excess air, and storing the bags in your freezer. After freezing, air dry before long-term storage. You can also use cedar blocks or mothballs in your closet, store sweaters in airtight containers, and regularly check for signs of moth activity.

How do I store sensitive plants like oxalis during fall?
Move your oxalis plant indoors before the first frost, keeping it in a cool location with plenty of indirect light. Water sparingly as oxalis prefers well-drained soil and is prone to root rot if overwatered.

How can I keep my pets from damaging stored winter knitwear?
Store knitwear in closed containers or on high shelves out of reach. Use pet-friendly deterrents like bitter apple spray around the storage area, choose natural fibers wherever possible, and contact your veterinarian immediately if you suspect your pet has ingested a toxic substance.

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