Medicinal Garden: 7 Herbs to Grow (General Information)

Direct answer: Seven reliable herbs for a home garden are sage, thyme, rosemary, mint, chamomile, calendula, and lemon balm. All are easy to grow in most US climates, tolerate poor soil, and dry well for storage. This page covers how to grow them, not how to treat any condition.

The 7 herbs and how to grow each

1. Sage (Salvia officinalis)

Perennial, hardy to zone 5. Full sun, poor-to-average soil, 18–24 inches apart. Drought-tolerant once established; overwatering kills it faster than cold. Harvest lightly the first year, then cut stems before flowering for the strongest flavour.

2. Thyme (Thymus vulgaris)

Perennial, zone 5–9. Needs sharp drainage — plant in a raised bed or gravel mulch. 8–12 inches apart. Creeping varieties make good ground cover between stones. Harvest anytime; flavour is best before flowering.

3. Rosemary (Salvia rosmarinus)

Perennial in zone 8+, container plant elsewhere so it can be moved indoors. Full sun, very well-drained soil, minimal water. It resents wet roots in winter. Harvest 4–6 inch tips and never take more than a third at once.

4. Mint (Mentha spp.)

Perennial, zone 4–9, and aggressively spreading. Always plant in a container sunk into the ground or a dedicated bed. Partial shade is fine. Harvest regularly — pinching back improves flavour and controls spread.

5. Chamomile (Matricaria chamomilla)

Annual, easy from seed. Full sun, average soil, 6–8 inches apart. Sow in early spring or late summer. Harvest flowers when fully open and dry them in a single layer, out of direct sun.

6. Calendula (Calendula officinalis)

Annual, zone 2–11 as a self-seeder. Full sun to part shade, 12 inches apart. Blooms over a long season; pick flowers every few days to keep it producing. Self-sows reliably if you leave a few heads.

7. Lemon balm (Melissa officinalis)

Perennial, zone 4–9, also spreads. Partial shade, moist soil. Cut back after flowering to keep it tidy. Best used fresh; dried leaves lose aroma quickly.

Where to put the herb bed

Put the Mediterranean group — sage, thyme, rosemary — in the sunniest, best-drained spot you have, ideally a raised bed with gravel mulch and no irrigation line running through it. They sulk in rich, wet soil and die in wet winters.

Put mint and lemon balm in containers on the north or east side of the house, where they get partial shade and cannot escape. Chamomile and calendula can go between vegetable beds; both self-sow and feed pollinators, and calendula pulls aphids away from brassicas.

Keep the herb bed near a path. Herbs that are a two-minute walk away get used; herbs at the back of the lot become decorations.

Harvest and drying basics

• Timing: harvest in mid-morning after dew dries and before the sun is hottest — essential oils are highest then.
• Method: cut stems, bundle 5–8 stems with twine, hang upside down in a dark, dry, ventilated room for 10–14 days.
• Alternative: a dehydrator at 95–110°F for 2–4 hours for leaves, longer for stems.
• Storage: whole leaves in airtight glass jars, out of light, labelled with the date. Crush only when using.
• Shelf life: 12 months for most dried leaves; discard anything that smells like hay.

Garden design notes

Most of these herbs are Mediterranean in origin and share three needs: sun, drainage, and poor soil. Group them together in a gravel-mulched bed away from the vegetable irrigation. Mint and lemon balm go in containers. Chamomile and calendula can be tucked between beds as annual fillers that also feed pollinators.

Safety note

General information only, not medical advice. Some herbs interact with blood thinners, blood pressure medication, and pregnancy. Identification matters: several lookalikes are toxic. If you are unsure of a plant's identity, do not consume it. Consult a qualified professional before any medicinal use.

Using the finished compost

Finished compost is dark, crumbly, and smells like wet leaves. Screen out unfinished chunks and return them to the top of the tower. Use it as a top dressing at 1–2 inches on beds, mixed into potting soil at 20–30%, or as a mulch around perennials.

Do not use fresh, unfinished compost as a seed-starting mix — it is too strong and can burn seedlings. Let it mature for another few weeks in a covered pile if it still contains recognizable scraps.

Frequently asked questions

Next: the general tincture process. For the wider garden plan, see seed saving and the book review, which covers the garden chapter this sits alongside.

Frequently asked questions