September 17, 2026: Three Herbs For the Home Apothecary

By mid-September in my area, the garden shifts from asking for water to asking for a different kind of attention — everything going to seed is doing it now, all at once. Asters and goldenrod line the roadsides, maples are just starting to rust at the tips, and some mornings here and there are carring that first real chill.

This week's three herbs are worth knowing for three different reasons: nettle seed — yes, the same stinging nettle known as a spring tonic leaf — is having its last good week as seed, and does something different in the body than the leaf. Usnea, a lichen and not a plant at all, is waking up for its best season as fall rains start. And schisandra, a five-flavored berry that's never grown wild near where I live, is at peak ripeness right now on its native side of the world.

Stinging nettle is the same plant most of us know as a mineral-rich spring tonic leaf. But nettle is dioecious — male and female flowers grow on separate plants — and by September the female plants shift into producing dense, drooping seed clusters instead. It's a different medicine than the leaf: used almost exclusively as a kidney and adrenal remedy…which I find timely as nature transitions from a period of growth and overwhelm to a season of rest.

Self-Harvest: Stinging nettle is common across the Mid-Atlantic and much of the eastern U.S. — check patches you already know for female plants carrying seed, since only about half of any patch will have it this time of year.
Buy It: When buying seed- you want to look for seed rated for consumption, not regular planting seeds. Neither Starwest Botanicals nor Mountain Rose Herbs carries the actual dried medicinal seed, so this week's picks come from smaller specialty sources: Sage Consulting & Apothecary sells whole dried seed by the ounce or pound if you want to make your own tincture, tea, or gomasio, while Herbalist & Alchemist — David Winston's company, the herbalist who popularized nettle seed for kidney support — sells a ready-made 1:5 tincture if you'd rather skip the weeks-long maceration.

Nettle seed peaks from midsummer into mid-autumn depending on climate, with most Zone 7a/Mid-Atlantic growers seeing the best window from mid-August through September — making this a last-call week. Herbalists want the seed plump, green, and slightly moist, not dried brown, since browned seed has already lost potency.

Harvesting: gloved and long-sleeved, snip seed-bearing stems into a bag on a dry morning.
Tincture: 1 part crushed seed (fresh or dried) to 5 parts 40% alcohol, macerated 3–6 weeks in the dark, then strained.
Tea: a light 1–2 tsp infusion, 5–10 minutes, though tincturing or eating the seed is more common.
Drying/storage: air-dry 1–2 weeks or dehydrate at low heat, rub clusters over a bowl to separate seed from stem, and store airtight for a year or more.

Kidney and adrenal support: a trophorestorative (an herb that nourishes one specific organ) and mild energy tonic for fatigue — 30–60 drops of tincture, up to 3–4 times daily, taken consistently rather than as a one-off.
Culinary use: lightly toasted seed over yogurt or oatmeal, or ground with sesame and salt into a savory gomasio.
General: well tolerated short-term, with occasional mild GI upset.

Because nettle contains vitamin K, use caution alongside blood thinners. Not recommended in pregnancy, and anyone with an existing kidney or bladder condition should check with a practitioner before using the seed specifically, since it targets the kidneys directly. Other safety measures may be appropriate for you. Always consult a physician.

The strongest evidence here is a small case series, not a controlled trial: a 2003 report found patients with chronic renal impairment who added nettle seed to their care showed improved creatinine, a kidney-function marker — preliminary, but it lines up with why herbalists reach for this seed specifically (available via herbological.com). A 2012 lab study separately found the seed's extract showed strong antioxidant activity, higher than several synthetic comparators — an in-vitro finding, not a clinical outcome, but it backs the seed's reputation as a concentrated source of protective compounds distinct from the leaf.

Usnea, sometimes called old man's beard, isn't a plant at all — it's a lichen, a composite organism of fungus and algae that grows as pale gray-green strands on tree branches, especially conifers, in humid, high-air-quality forests. It's especially prolific in the Pacific Northwest, and fall and winter — not summer — are its most vigorous season. A quick ID check: stretch a strand; a white elastic cord at the center means it's usnea.

Self-Harvest: Usnea needs humid, high-air-quality forest — it's especially common in the Pacific Northwest, less so across much of the rest of the country, so whether this is realistic depends a lot on where you live. If you're in usnea range, favor downed branches and storm debris over stripping live growth.
Buy It: Starwest Botanicals carries whole dried, wildcrafted usnea if you'd rather skip foraging and make your own tincture or oil infusion, or go with Mountain Rose Herbs' ready-made usnea extract if you want a tincture without the 4–6 week maceration.

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Usnea can be gathered year-round, but fall is prime season, since cool, wet weather keeps it lush and pliable. It grows very slowly, so take no more than a quarter to a third from any single branch, and favor downed branches and storm debris over stripping live growth.

Drying: spread fresh usnea on a screen, well-ventilated and out of direct sun; it dries within a few days and should stay pale gray-green. Store airtight and dark for a year or more, as long as it holds color.
Tincture: pack a jar two-thirds full with dried, chopped usnea (or three-quarters full if fresh) and cover completely with 40–50% alcohol; store in the dark 4–6 weeks, shaking occasionally, then strain. Some herbalists add a water decoction alongside the alcohol tincture, since a few compounds pull better in water.
Infused oil: warm chopped dried usnea in olive oil on low heat for a few hours, strain, and use alone or with beeswax as a salve.

Respiratory support: a diluted tincture or tea for coughs and bronchial irritation, or a gargle with honey and warm water.
Topical use: usnea-infused oil or salve on minor wounds, rashes, and athlete's foot.
Dosing note: given the safety caveat below, keep internal use short-term and modest, not a daily long-term tonic.

Isolated, concentrated usnic acid — the compound usnea is best known for — has been linked to serious liver injury in high-dose supplement form, tied to a weight-loss product the FDA pulled from the market in 2001 after reports including acute liver failure and one death. That toxicity was tied to isolated, concentrated extracts, not traditional whole-lichen tea or dilute tincture, which contain far less usnic acid — but the distinction is worth taking seriously rather than assuming it clears traditional use entirely. Avoid concentrated usnic acid supplements, use whole-lichen preparations conservatively and short-term, and skip internal use if you have liver disease or are pregnant or breastfeeding. Other safety measures may be appropriate for you. Always consult a physician.

The liver-safety picture comes from a 2022 review tracing how usnic acid disrupts mitochondrial energy production in liver cells and walking through the cases behind that 2001 withdrawal — the key reference behind the caution above. More encouragingly, a 2025 study tested an oil extract of Usnea barbata against several common bacteria and a yeast and found meaningful antimicrobial and antioxidant activity — solid support for its traditional reputation as a topical antimicrobial.

Schisandra, known in Traditional Chinese Medicine as wu wei zi, or five-flavor fruit, is a woody vine native to the forests of northern China, Mongolia, and the Russian Far East. Its small, bright red berries grow in grape-like clusters and carry all five recognized flavors at once — sour, bitter, sweet, salty, pungent — exactly what the name describes, and its harvest window lines up almost exactly with right now.

Self-Harvest: If you have access to this berry: Pick berries once they're fully scarlet, generally late summer into fall, and process them fresh (tincture same day) or dry them promptly, since the ripe fruit is soft and doesn't hold well once picked.
Buy It: Mountain Rose Herbs and Starwest Botanicals both carry whole dried organic berries for tea or decoction — Mountain Rose Herbs' page also has some of the best background reading on the herb if you want to dig deeper while you shop. If you'd rather skip the simmering, Starwest's berry powder stirs straight into liquids, or go with Mountain Rose Herbs' ready-made tincture for the simplest option. Starwest also has schisandra blended into a ready-to-brew Energy Adjustment Tea if you'd rather skip preparation altogether.

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Berries ripen from August into September, with harvest running into October depending on climate. Peak ripeness shows as dark red clusters with sourness dominant. One study found organic acid content actually peaking in early-to-mid September specifically. Commercial harvest comes from vines several years established, since young plants don't fruit heavily.

Decoction: rinse 25–30g dried berries, simmer covered in about 1.5 liters water for 15 minutes, then steep off-heat another 10 minutes before straining.
Simple tea: 1–2 tsp steeped in 8 oz just-boiled water, 3–5 minutes, though the decoction pulls more lignans.
Tincture: fresh or dried berries both work; a standard dose is around 20 drops in water, up to 3 times daily.
Powder: dried and ground, dosed around 3 grams a day.
Drying/storage: low temperature only — high heat degrades the lignans — then keep airtight, away from light, heat, and humidity, like a fine spice.

Adaptogen and liver support: an adaptogen — an herb that helps the body resist and adapt to stress rather than treating one symptom — with a long traditional and research history around liver support, plus traditional use for fatigue and sleep. Taken as tea, decoction, tincture, or powder, generally daily as a tonic.
Culinary use: whole berries in smoothies, soaked in dark juice and strained, or baked into traditional teas.

Schisandra affects liver enzymes involved in drug metabolism, meaning real interaction potential with prescription medications processed the same way — worth taking seriously on anything with a narrow safety margin. Not recommended in pregnancy or while breastfeeding, and traditionally avoided during an acute infection the body needs to expel rather than contain. Other safety measures may be appropriate for you. Always consult a physician.

The best human evidence is a randomized, placebo-controlled trial in 45 healthy postmenopausal women: those taking 1,000mg of schisandra extract daily for 12 weeks saw roughly an 8% improvement in leg strength and a drop in resting blood lactate, a fatigue marker — real data, though from one trial in one population. On the liver side, a review pooling animal studies found consistent liver-protective effects across multiple injury models — preclinical, not human-outcome evidence yet, but it explains schisandra's strong traditional reputation for liver support.

This is a good week to lift to think about propogation in general. Seeds are forming, and the weather is cooling, which means it’s the ideal time for divinding crowded perennials. Daylilies, hostas, and bee balm all transplant well once the heat breaks. If you're planning a garlic bed, now through early October is the usual window in my region. And if you've still got tender potted herbs outside, watch the overnight lows — a light frost may be weeks off, but it's worth having a plan for bringing them in. (I’m looking at you, Aloe sitting on my front porch)

Three plants, three completely different stories — a stinging nettle you thought you knew, a lichen that isn't even a plant, and a berry that's half way around the world from me. The interesting stuff isn't always where you'd expect it.

If you try any of these — the nettle seed gomasio, a usnea salve, a schisandra decoction — I'd genuinely like to hear how it goes. Come share it in the Facebook group, Growing and Harvesting Medicinal Herbs & Teas, or drop your questions there.

See you in the group!

—Dana

About the editor: Dana is an herbalist, forager and grower who puts plants first for her family’s health. She enjoys teaching and learning - and always is up for a conversation about plants of all kinds. Dana also owns the Facebook community: Growing and Harvesting Medicinal Herbs & Teas.