The illustrated growing guide
Skullcap
Scutellaria lateriflora
Family Lamiaceae
Est. zones 4-8
Blue skullcap is a moist-meadow native mint-family herb with small blue flowers. It belongs in rain-garden edges and medicinal tea beds, but safety notes matter because commercial skullcap has a history of adulteration concerns.
Full Sun to Part Shade
Moderate water
Moderate growth
Native to North America
Attracts beesI
Overview
Will skullcap suit your garden, and what goes wrong.
Will it fruit where you are?
Enter your ZIP — we look up your USDA hardiness zone (2023 map) and check it against what skullcap actually needs.
Hardy inZones 4-8Skullcap at a glance
Common skullcap problems
- Almost none
- Powdery Mildew (minor)
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Growing
Light, water, soil, propagation and the season’s jobs.
How to grow skullcap: light, water & soil
How to plant & propagate skullcap
When to spray skullcap
Growing season. Airflow helps in humid sites.
The skullcap growing playbook
Field-tested instructions for every job skullcap asks of you, compiled from university extension guidance — in the order the season brings them.
Harvesting
Harvest skullcap flowering topsJun – Aug
Cut the top third of flowering stems and dry with airflow. Flowering tops are the traditional harvest and regrow from moist crowns.
⚠ Use verified plant material; avoid pregnancy/liver-risk combinations.
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The year
What skullcap asks for, month by month.
The skullcap year, month by month
BloomPruneHarvestWhat each band means
- Bloom — flowers open — pollinators working, frost on blossoms is the danger.
- Prune — shape it now — cuts heal cleanly and structure is visible.
- Harvest — picking time — check ripeness every few days.
The skullcap year as text
- Jan quiet month
- Feb quiet month
- Mar pruning
- Apr pruning
- May pruning
- Jun bloom, harvest
- Jul bloom, harvest
- Aug bloom, harvest
- Sep quiet month
- Oct quiet month
- Nov quiet month
- Dec quiet month
These are the species' typical months — expect them a few weeks earlier in warm zones and later in cold ones. Watch the plant, not just the calendar.
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Ecology & uses
What it does for the garden, and what it is grown for.
Skullcap in the garden system
- Herbaceous layer perennial
- Nectary/insectary
What skullcap is grown for
! Some parts toxic — see notesCaution: medicinal nervine tea; use verified material and avoid pregnancy or liver-risk combinations
Harvesting & storing skullcap
Flowering tops in summer for traditional tea.
Edibility, identification, and traditional-use notes here are general reference — not medical or veterinary advice, and not a claim that any plant treats or prevents anything. Medicinal ratings record how strongly a plant features in herbal tradition, nothing more. Never eat or dose a plant you have not positively identified. More on how to use this library.
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Cultivars
Named varieties of skullcap, ruled as a catalogue.
Best skullcap varieties & cultivars
Species
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Sources & plant ID
Where the care distinctions come from, and how the plant is filed.
Research basis
Sources behind this profile
No extension citations are attached to skullcapyet. The care figures below come from the library's own catalogue rather than a traced primary source.
Plant ID
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Where to buy
Third-party nurseries — not Story Thyme Farms.
Third-party nurseries, not Story Thyme Farms. Prices are theirs.
Story Thyme Farms may earn a small commission from these links, at no cost to you — it never changes what we recommend.
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Questions
Skullcap questions, answered straight.
Is skullcap safe for kids and pets?
With care. Caution: medicinal nervine tea; use verified material and avoid pregnancy or liver-risk combinations Site it accordingly if children or pets roam the garden. This is general reference, not medical or veterinary advice — call a vet or poison control if something has actually been eaten.
When do you harvest skullcap?
Flowering tops in summer for traditional tea.
How do you propagate skullcap?
Division or seed.
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Elsewhere
Where skullcap sits in the library.
Common Milkweed
Ironweed
Cup Plant
Helen's Flower (Sneezeweed)