How to Dry and Store Medicinal Herbs (So They Last All Year)
Growing medicinal herbs is only half the job. Dry and store them properly and one summer’s harvest keeps you in teas, salves and infusions right through winter. Do it badly and you end up with flavourless dust — or worse, mould. Here’s the simple, reliable way to preserve every herb in a classic medicinal garden.
When to Harvest for Drying
Timing matters more than technique. Pick on a dry morning after the dew has evaporated but before the midday sun, when aromatic oils are at their peak. Flowers (chamomile, calendula, lavender) should be freshly and fully open; leaves (yarrow, feverfew, marshmallow) are best just before the plant flowers. Never harvest wet plant material — it’s the number one cause of mouldy batches.
Method 1: Air-Drying (Best for Most Herbs)
The traditional method, and still the gentlest on delicate aromatic oils.
- Gather stems into small, loose bundles — no thicker than your thumb, so air reaches the centre.
- Tie with string and hang upside down in a warm, dark, well-ventilated spot. An airing cupboard, spare room, or shaded shed all work. Avoid steamy kitchens and direct sunlight, which bleaches colour and flavour.
- Leave for one to three weeks. Herbs are done when leaves crumble and stems snap cleanly rather than bend.
For loose flower heads like chamomile and calendula, spread them in a single layer on a mesh rack or a tea towel instead of bundling.
Method 2: Oven or Dehydrator (Fast Option)
In a damp climate, low heat is safer than slow air-drying. Use a dehydrator at 35–45 °C, or an oven on its lowest setting with the door propped open, and check every 30 minutes. Herbs scorch easily — if they brown, the batch is ruined. Roots (marshmallow, chicory, echinacea) are the exception that genuinely benefits from this method: scrub, chop into small pieces while fresh, and dry until hard right through.
Storing Dried Herbs Properly
| Rule | Why It Matters |
|---|---|
| Airtight glass jars, ideally amber | Light and air degrade the active compounds fastest |
| Store whole, crumble when using | Whole leaves and flowers hold their potency far longer than powder |
| Cool, dark cupboard | Heat above ~25 °C steadily weakens aroma and colour |
| Label with name and date | Most dried herbs are best used within 12 months; roots last 2–3 years |
| Check jars after the first week | Any condensation inside means the batch wasn’t fully dry — re-dry immediately |
From Dried Herb to Remedy
Once dried and jarred, your herbs are ready for the traditional preparations — teas, infused oils, salves and tinctures. If you’d like plant-by-plant instructions for all of that, the guide included with the Medicinal Garden Kit covers the full journey from seed packet to finished remedy for ten classic herbs; here’s our full review of what’s inside.
10 herbs, 4,818 non-GMO seeds, 365-day money-back guarantee
Not growing yet? Start with our pick of the 10 best medicinal herbs to grow at home — and if you’re short on space, all of them can be raised in containers on a patio or balcony.
