Dried flowers and everlastings.
Everlastings are the flowers that were never really soft: papery bracts, stiff stems, colour that is in the structure rather than in the water. Cut them at the right moment and hang them upside down and they will look much the same in five years, which is a strange thing for a flower to do and the whole reason people grow them.
The rest of the garden can be dried too, with more effort and more losses. This page covers both: what to sow if drying is the plan from the start, the two methods that actually work, and what to do with a rack full of dried stems once November arrives.
Honest about the limits: dried flowers fade, they collect dust, and they are brittle. Two winters is a good run for an arrangement in a light room. They are seasonal objects that happen to last longer than the season.
What to plant for drying
Some flowers dry because you dried them and some were always going to. The true everlastings - strawflower, statice, globe amaranth, xerochrysum - have papery bracts rather than soft petals and come out of the drying rack looking almost unchanged. Add celosia for texture, larkspur and nigella for blue, honesty for the silver seed discs, and any of the ornamental grasses for filler. A single bed three metres long, cut over and over from July, supplies a household's worth of dried material by October.
Air drying
The default method, and the one that costs nothing. Cut in the morning once the dew has gone, strip the lower leaves, tie in small loose bunches - big bunches rot in the middle - and hang them upside down somewhere dark, dry and moving with air. Two to three weeks does most things. Darkness is the part people skip and it is the part that keeps the colour; a sunny window bleaches a bunch of larkspur to grey in a fortnight. Stems shrink as they dry, so retie the string once.
Silica gel drying
Air drying flattens and shrivels anything with a soft, full flower head - roses, peonies, dahlias, zinnias. Silica gel holds the shape instead: the bloom is buried face-up in the crystals in a sealed box and left for a few days to a week while the gel pulls the water out. What comes out keeps its form and most of its colour, and is also much more fragile than an air-dried stem. Reusable, and the used gel is dried out in a low oven to go again. Not a cheap method for volume, but it is the only way to keep a rose looking like a rose.
Wreaths
A wreath is the standard destination for a full drying rack. Small bunches of three or four stems are wired to a base - straw, willow, vine or wire - all facing the same way so each bunch hides the stems of the last, and the ring is worked round until it closes. Dried material is brittle, so the assembly is done gently and the finished wreath is hung somewhere it will not be brushed past. A wreath built on a willow ring you wove yourself is a satisfying pairing of two crafts.
Winter arrangements
The point of a drying rack in August is a house with flowers in it in January. Dried arrangements work differently from fresh ones: no water, so the mechanics are foam or a dry-packed vase, and the colour range is warmer and duller, which suits winter light. Seed heads earn their place here - honesty discs, poppy pods, nigella lanterns, teasel - along with grasses for movement. A dried arrangement lasts a season or two before dust and light finish it, and that is the honest lifespan.
Eco printing with leaves
Leaves and petals bundled tight against damp fabric or paper and steamed will print their own shape and pigment onto it. Eucalyptus, maple, rose and onion skin are the reliable starters. The bundle is rolled round a rod, tied hard, steamed for an hour or two and left to cool before opening, which is the part nobody wants to wait for. Results are unrepeatable by nature - the same leaf gives a different print twice. Metal in the bundle shifts the colours, which is where it starts overlapping with proper natural dyeing.