perennial

Somerset Skullcap

Scutellaria altissima

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Essentials

At a Glance

Plant Type

Perennial

Height

30 inches

Width

18 inches

Light

Full Sun, Partial Sun

Zones

5, 6, 7, 8

Water

Moderate

Humidity

Average

Lifespan

Perennial

Native To

Southeastern Europe to Caucasus

Toxicity

Non-toxic to humans and pets

The Story

Plant Bio

Scutellaria altissima, commonly known as Somerset skullcap, is an herbaceous perennial native to southeastern Europe and the Caucasus. It is noted for its upright spikes of hooded, violet-blue flowers that bloom from late spring to early summer. This species is known for its robust stature and ability to thrive in various soil types, making it versatile for garden settings.

Uses & Benefits:

Provides attractive, aromatic purple flowers that enhance garden aesthetics.

Herb used in traditional medicine for its anti-inflammatory properties.

Supports pollinators like bees and butterflies, enriching local biodiversity.

Marketplace

Where to Buy

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Planting

How to Grow

Select well-draining soil with neutral to slightly alkaline pH.
Tuck seeds just below soil surface and keep moist for germination.
Mist cuttings regularly to maintain humidity and promote root growth.
Transplant seedlings when they are strong and weather permits, typically after last frost.
Space plants about 12-18 inches apart for optimal growth.
Mulch around plants to retain moisture and suppress weeds.

Pro Tip

Ensure good air circulation to prevent fungal issues and promote healthy growth.

Keep It Thriving

Care Guide

Do

Water regularly to keep soil evenly moist 🌱
Prune lightly after flowering to encourage bushiness
Fertilize with a balanced, organic fertilizer in early spring
Monitor for pests and diseases consistently

Don't

Avoid overwatering, which can lead to root rot ❌
Don’t forget to remove dead or damaged stems
Avoid planting in dense shade which hampers flowering
Don’t use chemical pesticides excessively

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Deadhead
Divide
Mulch
Plant
Spring Cleanup

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Aromatic borderHerbaceous perennial bed

Companion Plants

Lavender Salvia Yarrow Echinacea Coreopsis

Multiply

Propagation Methods

Good to Know

Common Questions

Somerset Skullcap questions

What zones can Somerset Skullcap grow in?

Somerset Skullcap is hardy in USDA Zones 5–8. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Somerset Skullcap deer resistant?

Yes — Somerset Skullcap is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.

When does Somerset Skullcap bloom?

Somerset Skullcap typically blooms in late spring to early summer through early fall. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Somerset Skullcap need full sun?

Somerset Skullcap does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.

Is Somerset Skullcap drought tolerant?

Yes — once established (usually after the first full season), Somerset Skullcap handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.