Yes, you can wash a knitted blanket, but the method matters

A knitted blanket can be washed at home, but it requires a gentler approach than machine-washing regular laundry. The fibres in knitted fabric are interlocked loops that can stretch, felt, or snag if exposed to heat, agitation, or harsh chemicals. Hand washing in cool water is the safest method for most knitted blankets, though some acrylic or wool-blend blankets can tolerate a delicate machine cycle if you follow specific steps.

The type of yarn matters most. Merino wool, cashmere, and other animal fibres need hand washing in cool water. Acrylic and synthetic blends are more forgiving and may survive a machine's delicate setting. Cotton blends fall somewhere in between. Before you wash, check the yarn label or any care tag attached to the blanket — it will tell you the fibre content and any washing restrictions the maker recommends.

Key Takeaways

  • Hand washing in cool water with mild detergent is the safest method for any knitted blanket and takes about 30 minutes of active time.
  • Machine washing on delicate cycle is possible for acrylic and synthetic-blend blankets, but only if you use a mesh laundry bag and cold water.
  • Never use hot water, regular laundry detergent, fabric softener, or the dryer — all of these damage knitted fibres.
  • Lay the blanket flat to dry on a clean towel or drying rack, reshaping it gently while it is still damp to restore its original size.
  • Wool blankets may need blocking — pinning the damp blanket to its correct dimensions — to prevent shrinkage or stretching.

Hand washing: the method that works for every blanket

Fill a basin or bathtub with cool water — around 65 to 75 degrees Fahrenheit. Add a small amount of mild detergent designed for delicate fabrics. Woolite, The Laundress Delicate Wash, and Dreft are common choices, but any gentle soap without bleach or enzymes will work. Submerge the blanket and let it soak for 10 to 15 minutes without agitating.

Gently squeeze the soapy water through the blanket by pressing it with your hands. Do not wring, twist, or rub the fabric. After 10 minutes of gentle squeezing, drain the water and refill the basin with cool water. Repeat the squeeze-and-drain process two or three times until the water runs clear and no soap remains.

Lift the blanket carefully and support its weight as you move it to the drying area. Wet knitted fabric is heavy and stretches easily, so never hang it or wring it out. Instead, lay it flat on a clean, dry towel or on a mesh drying rack. Gently reshape it to its original dimensions while it is still damp — straighten the edges, smooth out wrinkles, and adjust the length and width. Allow it to air dry completely, which usually takes 24 to 48 hours depending on humidity and air circulation.

Machine washing for acrylic and synthetic blankets

Acrylic and polyester-blend blankets are more durable than natural fibres and can tolerate machine washing if you use the right settings. Place the blanket inside a mesh laundry bag to reduce agitation and friction against the drum. Select the delicate or hand-wash cycle, set the water temperature to cold, and use a small amount of mild detergent — no more than one tablespoon for a standard load.

Do not add fabric softener, bleach, or any other additives. Run the cycle and remove the blanket when ready when it finishes. Do not leave it sitting in the machine, as damp fabric can develop odours or mildew. Lay it flat to dry using the same method as hand washing: on a clean towel or drying rack, reshaped while damp, and left to air dry completely.

What to avoid when washing a knitted blanket

Hot water is the most common mistake. Heat causes wool and other animal fibres to felt — the scales on the fibres lock together and the blanket becomes stiff, matted, and smaller. Even warm water can cause gradual shrinkage. Always use cool or cold water, no matter the fibre type.

Regular laundry detergent is too harsh. It contains enzymes and surfactants designed to break down dirt and oils, but they also break down the structure of delicate fibres. Fabric softener coats the yarn and dulls the texture. Bleach damages or discolours most fibres. Stick to mild, pH-neutral detergents made for delicates or wool.

The dryer is off-limits. Machine drying applies heat and tumbling that will shrink, felt, and damage the blanket. Even low-heat settings are too risky. Air drying is the only safe option.

Blocking: restoring shape to wool blankets

Blocking is a technique used to reshape knitted items to their correct dimensions after washing. It is especially important for wool blankets, which can stretch or shrink unevenly during the wash. To block a blanket, lay it damp on a flat surface — a clean bed, a blocking board, or a large towel works well. Use measuring tape to check the length and width against the blanket's original dimensions or your target size.

Gently stretch the blanket to the correct shape and pin the edges in place using T-pins or blocking pins spaced a few inches apart. Leave the blanket pinned until it is completely dry, which may take 24 to 48 hours. Once dry, remove the pins and the blanket will hold its shape. Blocking is optional for acrylic blankets but recommended for wool, cashmere, and other animal fibres.

Spot cleaning between washes

You do not need to wash a knitted blanket every time it gets a small stain. Spot cleaning extends the time between full washes and reduces wear on the fibres. Mix a small amount of mild detergent with cool water to make a cleaning solution. Dip a clean cloth into the solution and gently dab the stained area, working from the outside of the stain toward the centre to avoid spreading it.

Rinse the area with a cloth dampened in plain cool water, then blot with a dry towel to remove excess moisture. Allow the spot to air dry completely. For stubborn stains, repeat the process or let the solution sit on the stain for a few minutes before rinsing, but do not scrub or rub the fabric.

How often to wash a knitted blanket

A knitted blanket used regularly for warmth does not need frequent washing. Washing once every few months is usually enough, unless the blanket is visibly soiled or has absorbed odours. Overwashing accelerates wear and fading, so spot cleaning between washes is a better approach.

If the blanket is used in a bedroom and not exposed to dirt or spills, washing once or twice a year may be sufficient. If it is used on a couch where people eat or spend time outdoors, washing every two to three months is reasonable. Store the blanket in a clean, dry place between uses, and consider using a breathable storage bag to protect it from dust and pests without trapping moisture.

Frequently Asked Questions

Can I use a washing machine on gentle cycle for a wool blanket?

It depends on the blanket's construction and the machine's gentleness. Some modern machines have a true hand-wash cycle that mimics hand washing closely enough to be safe for wool. If you choose to machine wash wool, use a mesh bag, cold water, and mild detergent, and remove the blanket when ready after the cycle ends. Hand washing is still the safest option for expensive or delicate wool blankets.

What if my blanket shrinks after washing?

Shrinkage is usually permanent, especially in wool. Blocking while damp can sometimes restore a small amount of size, but it cannot fully reverse felting or significant shrinkage. The best approach is prevention: use cool water, mild detergent, and gentle handling from the start. If shrinkage does occur, the blanket may still be usable as a smaller throw or child's blanket.

Is it safe to wash a vintage or antique knitted blanket?

Vintage blankets are often fragile and may have weakened fibres or delicate dyes. Test a hidden corner with a damp cloth first to see if the dye bleeds or the fabric tears easily. If the blanket passes the test, hand wash in cool water with very mild detergent and handle it with extra care. For heirloom blankets, consider professional dry cleaning instead.

Can I use vinegar or baking soda to clean a knitted blanket?

Vinegar can be used as a rinse to remove soap residue and restore softness, but only after the main wash is complete. Add one tablespoon of white vinegar to the final rinse water. Baking soda is too abrasive for knitted fabrics and should not be used. Stick to mild detergent for the main wash and plain water for rinsing.

How do I remove odours from a knitted blanket without washing it?

Hang the blanket outdoors in fresh air and sunlight for a few hours — sunlight naturally kills odour-causing bacteria. You can also place the blanket in a sealed bag with crumpled newspaper, activated charcoal, or coffee grounds for 24 hours to absorb odours. If these methods do not work, a full hand wash is the next step.