Half of most wardrobes is unusable for half the year. Winter coats in July and summer dresses in January occupy the space you need for what you are actually wearing.
If space is tight, this matters even more. The whole job takes one afternoon, twice a year, and it gives you back a shelf or two you did not know you had.
Rotate twice, not four times
Two changeovers a year is enough: roughly March and October. Any more and it becomes a chore you abandon by the second year.
Wash everything before it goes away
This matters more than people expect. Moths are attracted to skin, sweat and food traces, not to clean fabric. Anything stored dirty comes out damaged, and you will not find out until the season you need it.
Fold knitwear, hang coats
Hanging jumpers stretches the shoulders out of shape, so fold them. Coats and jackets keep their shape better on a sturdy hanger, inside a breathable cotton cover. Plastic covers trap damp.
Choose the container for the place
Under the bed: flat lidded boxes on wheels. Top of the wardrobe: soft zip bags with handles, because they are easier to lift down. A loft or garage: hard plastic with a sealed lid only, never cardboard.
Never store clothes in cardboard long term
Cardboard absorbs damp, attracts silverfish, and transfers acid to fabric over time. It is fine for a week and poor for six months.
Go easy on vacuum bags
They save a lot of room, but crushing wool and down for months can flatten them for good. Use them for cotton and synthetics, and keep your best coats in a box or bag that lets them breathe.
Add a little moth protection
A few cedar blocks or lavender sachets in each box help. Refresh them at every changeover, because the scent fades.
Keep one item from the other season out
One warm layer in summer, one light layer in winter. Weather ignores your calendar, and having to unpack a whole box for one jumper is how rotation systems die.
Photograph the inside of the box
Take a picture of the contents before you close it and keep it on your phone. Faster than labels, and you will actually be able to read it.
Use the changeover to let things go
You are handling every item twice a year anyway. Anything you did not wear once last season is very unlikely to be worn next season. This is the natural moment to decide, with no special decluttering session required.
“What I got wrong”
I stored winter coats in cardboard boxes in a cupboard that turned out to be slightly damp. They came out smelling musty and two needed professional cleaning, which cost more than the plastic boxes I should have bought.
Do it once this October and you will see how little effort it takes. After that, it is mostly habit.