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Monarda didyma 'Jacob Cline' (Jacob Cline Bee Balm)
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© Dominicus Johannes Bergsma, some rights reserved (CC-BY-SA) · Wikimedia Commons

Monarda didyma 'Jacob Cline'

Jacob Cline Bee Balm

Garden selection; species {Monarda didyma} is native to eastern North America — from Maine south to Georgia

At a Glance

FoliageDeciduous
Height36-48 inches (90-120 cm)
Width24-36 inches (60-90 cm)
Maturity2 years

Growing Zones

USDA Hardiness Zones

4 - 9
These zones indicate the coldest temperatures this plant can typically survive.
What's my zone? →
Frost Tolerancehardy

Overview

Monarda didyma 'Jacob Cline' is a deep red bee balm with strong mildew resistance among red-flowered cultivars, growing 36–48 inches (90–120 cm) tall and spreading 24–36 inches (60–90 cm) by stolons. Deep scarlet-red flowers in large shaggy whorl-like heads 3–4 inches (8–10 cm) across bloom from July through August. 'Jacob Cline' was selected in the mountains of North Carolina for the deepest red colour and stronger mildew resistance than other red-flowered cultivars — though no M. didyma cultivar is fully immune to powdery mildew, this selection holds up better than most through humid summers. The species is a leading hummingbird perennial in eastern North America — the red tubular flowers are shaped for hummingbird bills. The common name 'bee balm' references the bee-attracting properties, and the species was historically used to make Oswego tea. The species name 'didyma' means 'in pairs', describing the opposite leaf arrangement. Spreads by stolons — can be aggressive; division every 2–3 years controls the colony. Thinning stems for air circulation further reduces mildew risk. Strongly aromatic foliage. Deer avoid the foliage.

Native Range

The species Monarda didyma is native to eastern North America — from Maine south to Georgia. 'Jacob Cline' was selected in North Carolina.

Suggested Uses

Used in borders, native plant gardens, hummingbird gardens, and cottage gardens. A leading hummingbird perennial in eastern North America. The deep red colour with stronger mildew resistance among red cultivars. Herbal tea (Oswego tea). Control spread with division every 2–3 years.

How to Identify

Identified by deep scarlet-red large shaggy whorl-like flower heads on tall (36–48 inches / 90–120 cm) spreading stems with dark green aromatic opposite leaves. The deep red colour separates this from pink and lavender bee balms. The shaggy, whorl-like flower form and the strong aromatic foliage confirm Monarda. The stoloniferous spreading habit identifies M. didyma (vs. clumping M. bradburiana).

Appearance

Size & Dimensions

Height3' - 4'
Width/Spread2' - 3'

Reaches mature size in approximately 2 years

Colors

Flower Colors

Foliage Colors

Fall Foliage Colors

Bloom Information

Bloom Period

~5 weeks
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Flowering in July and August, approximately 5 weeks. Deep scarlet-red shaggy heads.

Detailed Descriptions

Flower Description

Deep scarlet-red, in large shaggy whorl-like heads

Foliage Description

Dark green, aromatic, lance-shaped, opposite

Growing Conditions

Sun Requirements

Requires 5-10 hours of direct sunlight daily
• Full Sun: 6+ hours of direct sunlight
• Partial Shade: 3-6 hours of direct sunlight
• Full Shade: Less than 3 hours of direct sunlight

Soil Requirements

pH Range6.0 - 7.5(Neutral)
357912
Soil Types
Drainagemoist

Water & Climate

Water Needs

Medium

Frost Tolerance

hardy

Time to Maturity

1-2 years

Care & Maintenance

Care Guide

Plant in full sun (more sun = less mildew). Moist soil. Thin stems for air circulation. Divide every 2–3 years to control spread. Holds up better than most red bee balms through humid summers. Herbal tea plant.

Pruning

Deadhead spent heads. Thin stems for air circulation. Cut to ground after frost or in early spring. Divide stoloniferous clumps every 2–3 years.

Pruning Schedule

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fallearly spring

Maintenance Level

moderate

⚠️ Toxicity Warning

Non-toxic