Drying Herbs and Flowers for Winter Use

Timing the Harvest

The heath is at its most generous from late June through to early September, and a few well-chosen basketfuls now will keep your kitchen and medicine shelf supplied right through to spring. The trick is to pick at the right moment. Go out mid-morning, once the dew has lifted but before the midday sun has warmed the oils out of the leaves. Never gather wet plants — damp material is the surest route to mould.

Good heathland candidates include ling heather flowers, wild thyme, yarrow, meadowsweet, rosebay willowherb leaves, gorse flowers with their faint coconut scent, bog myrtle and bilberry leaf. From hedgerows and verges, add elderflower, hawthorn blossom and chamomile. Take only from abundant stands, never dig up a plant, leave the roots and the seed heads behind, and pick nothing from busy roadsides or land where you do not have permission. A few stems from many plants always beats stripping one.

Air-Drying: The Gentle Method

Air-drying suits anything woody or leathery — thyme, yarrow, mint, rosemary, lavender — and it preserves aroma far better than heat. Gather stems into loose bunches of six to eight, tie them with garden string and hang them upside down somewhere dark, dry and genuinely airy. Airing cupboards, spare rooms and well-ventilated sheds are ideal; a steady 18–24°C is plenty. Keep them out of direct sunlight, which bleaches colour and flattens flavour.

Slip a paper bag or a muslin square over each bundle to catch dust and falling seeds, and punch a few holes for airflow. Thin-leaved herbs are usually ready in five to ten days; thicker stems take a fortnight or more. The test is simple — bend a stem, and if it snaps cleanly rather than bending like a shoelace, it is done.

Flower heads need a different approach. Heather, yarrow and chamomile are best spread in a single layer on a cooling rack lined with muslin or newspaper, turned once a day until papery. Elderflower and meadowsweet turn brown if dried slowly, so give them warmth and moving air.

Oven-Drying and Warm-Air Methods

On a damp October afternoon, the oven earns its keep. Set it to its lowest setting — around 40–50°C — and prop the door open with a wooden spoon so moisture can escape. Lay your material in a single layer on baking parchment and check every twenty minutes; most leaves are crisp within one to three hours.

• Leaves are ready when they crumble easily between finger and thumb.
• Petals and thin flowers need only twenty to forty minutes and should be watched closely.
• A dehydrator at 40°C does the same job more evenly, with far less peering through the glass.
• A hot car parked in the sun, windows just cracked, will dry a tray of herbs in an afternoon — an old forager's standby.

If your herbs turn brittle and brown rather than crisp and fragrant, you have cooked the oils out of them. Drop the temperature and shorten the time next batch.

Pressing Flowers and Petals

Not everything needs to end up in a jar. Pressed flowers hold their colour beautifully and cost nothing but patience. Lay small sprigs — heather, tormentil, yarrow, buttercup, violet — between sheets of blotting paper, then sandwich them between the pages of a heavy book and weight it down. Two to four weeks later you have flat, delicate material for cards, bookmarks and framed pictures.

For pot-pourri, dry petals in a single layer until leathery, then layer them in a jar with a little salt for a week before mixing with a spoonful of orris root and a pinch of cinnamon or clove. Lavender, rose and gorse petals combine beautifully. Wear gloves when handling anything you are unsure of — foxglove and some other heathland plants are toxic, however pretty they press.

Storing Your Store

Store everything whole and crush only as you use it, because broken leaves lose their fragrance far faster. Use clean, dry glass jars with airtight lids, label each with the plant name and the date, and keep them in a dark cupboard away from the steam and heat of the hob. A sachet of silica gel in each jar guards against any lingering damp.

Leaves will hold their quality for around twelve months; flowers for six to twelve. Check periodically for mustiness or clumping — if a jar smells fusty rather than fragrant, compost it without regret.

From Jar to Kitchen and Back Out Again

Winter teas are the simplest reward. A spoonful of dried heather flowers with a little thyme makes a warming brew; yarrow and elderflower are traditional companions at the first sniffle. Meadowsweet is lovely for headaches, but it contains salicylates, so anyone allergic to aspirin should leave it alone, and if you are pregnant, on medication or unsure, speak to a qualified herbalist first.

Infused oils and vinegars are just as easy. Fill a jar with dried calendula, thyme or yarrow, cover with olive oil, leave on a sunny windowsill for a fortnight, then strain into a clean bottle. Use it in salves, or whisk a thyme vinegar into salad dressings. Heather honey infused with a handful of dried flowers is a winter treat worth the wait.

Crafts round things off nicely. A dried heather wreath lasts for years, small muslin bags filled with lavender and hops make sleep pillows, and bunched stems tied with ribbon give a bit of summer to a January windowsill. Nothing you gathered in the sunshine need be wasted.