Drying & Preserving Herbs & Tea
Grew more than you can use? A beginner's guide to drying, freezing and storing herbs, tea leaves and home-grown mushrooms so nothing goes to waste.
A good growing season has a happy problem: more than you can eat fresh. The skill that turns a glut into a year-round larder is preserving - and for herbs, tea plants and home-grown mushrooms, that mostly means drying (with a few smart exceptions). Here’s the honest, low-equipment version.
Not medical advice. This is a reading guide, not health advice. Any plant can set off a reaction in some people, herbal teas can interact with medicines, and misidentification is a real risk - check with a doctor or pharmacist if you take medication or are pregnant, and never eat a plant you have not identified with certainty.
New to this series? “Garden & Kitchen” is about what you do with a harvest once it’s bigger than tonight’s dinner - drying, freezing and storing so nothing is wasted.
The one principle behind all drying
Spoilage needs moisture. Remove the water and most things keep for months. The whole craft is just: dry it fully, then keep it dry and dark. Three routes, easiest first:
- Air-drying - free, slow, perfect for herbs and tea. A warm, airy, shaded spot.
- Low oven / dehydrator - faster and more reliable, essential for fleshy things like mushrooms.
- The freezer - not “drying,” but the best route for things that lose too much when dried.
Herbs
Most culinary herbs dry beautifully and keep their punch for months.
- Easiest to air-dry: the sturdy herbs. The US National Center for Home Food Preservation names rosemary, sage, thyme, summer savory and parsley as the easiest to dry without a dehydrator. Bundle small bunches of rosemary and the rest, hang them upside down somewhere warm, airy and out of direct sun, and leave them until the leaves crumble and the stems snap when bent. Strip the leaves and store whole in jars; crush only when you use them.
- Dry fast, or freeze: the same source warns that basil, oregano, tarragon, lemon balm and the mints hold a lot of moisture and will mould if they are not dried quickly. Dry them in very small bunches or in a dehydrator - or freeze them: the Center’s method is to wash, pat dry, wrap a few sprigs in freezer wrap and seal them in a freezer bag. Frozen herbs go limp when thawed, so they are for cooked dishes, not garnish.
- Herbs in oil go in the fridge or the freezer, never on the shelf. Herbs and oil are both low-acid, and the Center says that together they could support the growth of the bacteria that cause botulism. Its advice: make herb-flavoured oil for fresh use, keep it in the refrigerator and use it within 2 to 3 days. Pesto can be frozen; there is no safe home-canning method for either.
- Storage: airtight jars, out of the light. Whole leaves keep flavour far longer than pre-ground.
Tea-garden leaves
If you grow tea-garden plants (mint, lemon balm, chamomile, lemon verbena, true tea and the like), drying is how you build a year’s brews.
- Harvest young, healthy leaves or flowers, ideally in the morning once any dew has dried.
- Dry gently but not slowly - mint and lemon balm are among the herbs that mould if drying drags on, so spread the leaves in a single layer on racks or hang very small bunches where air moves. A dehydrator is the reliable route: the National Center for Home Food Preservation suggests 95°F to 115°F for herbs, and up to 125°F where the air is humid. Higher heat costs aroma.
- Store dried leaves whole in airtight jars away from light; crumble into a pot or infuser when you brew. Most keep their character for many months.
- No medical claims: enjoy home-grown teas as the pleasant drinks they are - they’re not medicine.
Mushrooms
If you’ve grown your own edible mushrooms (oyster, shiitake, lion’s mane and friends - or you’ve gathered with an expert), preserving keeps a flush going for months.
- Drying is king for many: shiitake, lion’s mane, and especially porcini and black trumpet (if you forage) concentrate and deepen in flavour when dried - often better than fresh. Slice, dry in a dehydrator or low oven until cracker-dry, and store airtight. Rehydrate in warm water before cooking, and save the strained soaking liquid as an intense stock.
- Cook-then-freeze suits softer, watery mushrooms (and anything you want to keep its texture): sauté first, cool, then freeze in portions. Freezing raw mushrooms usually disappoints.
- Always cook cultivated mushrooms before eating, and never eat any wild mushroom without expert identification - drying a misidentified mushroom doesn’t make it safe.
A quick reference
| Crop | Best method | Notes |
|---|---|---|
| Sturdy herbs (rosemary, sage, thyme) | Air-dry | Hang small bunches; store whole leaves |
| Moist herbs (basil, mint, lemon balm) | Dry quickly, or freeze | Mould if dried slowly; frozen herbs suit cooked dishes |
| Tea leaves & flowers | Single layer on racks / low dehydrator | Low heat saves the aroma; do not let drying drag on |
| Firm mushrooms (shiitake, porcini) | Dry | Often better than fresh; save soaking liquid |
| Soft mushrooms | Cook then freeze | Don’t freeze raw |
The point of all this
Preserving is the quiet half of growing things: it’s how a busy fortnight of harvest becomes a shelf of jars you reach for all winter. Dry what dries well, freeze what doesn’t, keep it all dark and airtight - and a single good season feeds you long after the plants have gone to sleep.
Want the deeper version? Many of our plant, tea and mushroom guides include a harvest-and-store section for that exact species.
Recommended Gear on Amazon
- Food dehydrator - browse current options and reviews on Amazon.
- Mason jars - browse current options and reviews on Amazon.
- Herb drying rack - browse current options and reviews on Amazon.
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