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Coleus scutellarioides (Coleus)
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© Babajide Agboola, some rights reserved (CC-BY-NC) · iNaturalist

Coleus scutellarioides

Coleus

At a Glance

TypeAnnual
HabitUpright
FoliageEvergreen
Height12-36 inches (30-90 cm)
Width12-24 inches (30-60 cm)
Maturity1 years

Overview

Coleus scutellarioides is a tender perennial grown as an annual in zones 4-9 and a perennial in zones 10-11, reaching 12-36 inches (30-90 cm) tall and 12-24 inches (30-60 cm) wide depending on the cultivar. Foliage opposite, ovate to lance-shaped with toothed or scalloped margins, 2-6 inches (5-15 cm) long, in patterns ranging from solid burgundy or chartreuse to multicolored combinations of green, yellow, pink, red, and brown. Stems square in cross-section as in other Lamiaceae. Flowers small, blue or lavender, in terminal racemes 4-8 inches (10-20 cm) tall in late summer; the species is grown for foliage and flower spikes are typically pinched to keep energy in the leaves. Heat-tolerant and humidity-tolerant; holds in conditions where many other shade annuals decline. Tender to frost; foliage and stems collapse at temperatures below 32°F (0°C). Sun-tolerant cultivar series like 'Wizard' and 'ColorBlaze' hold leaf color in full sun where older shade-only forms scorch.

Native Range

Coleus scutellarioides is native to Southeast Asia, principally Indonesia, the Philippines, Malaysia, and southern China, in moist forest understory and disturbed roadsides at 100-5,000 feet (30-1,500 m) elevation. The species was previously placed in Solenostemon and Plectranthus before molecular work returned it to Coleus in 2019.

Suggested Uses

Used in containers, shade beds, mixed annual borders, and as a thriller or filler in 3-tier container designs at 12-18 inch (30-45 cm) spacing. Common in commercial color rotations for the wide foliage palette and tolerance of heat and partial sun. Single-color cultivars (solid burgundy or chartreuse) are also planted in mass for ribbons of single color in mixed plantings.

How to Identify

Distinguished from other foliage annuals by the combination of opposite leaves with toothed margins, square stems characteristic of Lamiaceae, and the wide range of variegated leaf patterns. Crushed foliage shows a faint herbal scent. Older leaves at the base often show duller color than the actively growing tips; full color develops on growth from the current season.

Appearance

Size & Dimensions

Height1' - 3'
Width/Spread1' - 2'

Reaches mature size in approximately 1 years

Colors

Flower Colors

Fall Foliage Colors

Bloom Information

Bloom Period

~8 weeks
J
F
M
A
M
J
J
A
S
O
N
D
Late summer through fall in zones 9-11 (August-October); rarely blooms in shorter-season climates before frost. Bloom indicates a shift from vegetative growth to reproduction; pinching out flower spikes before they elongate maintains foliage density and extends the period of vivid leaf color. Plants that set seed often decline in vigor.

Detailed Descriptions

Foliage Description

varies by cultivar: green, burgundy, chartreuse, pink, red, yellow, brown patterns

Growing Conditions

Sun Requirements

Requires 2-8 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
Drainagewell drained

Water & Climate

Water Needs

Medium

Frost Tolerance

tender

Time to Maturity

1 year

Care & Maintenance

Care Guide

Grown in part sun to part shade in moist, well-drained soil; soil pH 6.0-7.5 suits the species. Sun-tolerant cultivars hold color in 6-8 hours of direct sun in zones 4-7 with consistent moisture; older shade-only forms scorch above 4 hours of direct sun. Water regularly and consistently; brief drought causes wilting and lower leaf drop within 24-48 hours. Soft cuttings root in 7-10 days in water or moist medium. Mealybugs and whiteflies occur on indoor or greenhouse plants; both are managed by isolation and neem applications.

Pruning

Pinch growing tips weekly through the season to maintain a dense, branching habit and to delay flowering. Remove flower spikes as they form to keep energy in the foliage. Cut leggy or sun-bleached stems back by one-third in midsummer; new growth in 10-14 days carries the cultivar's full leaf color. Take 4-6 inch (10-15 cm) cuttings in late summer for indoor overwintering in zones 4-9.

Maintenance Level

low

Container Growing

✓ Suitable for container growing

Minimum container size: 2 gallons

⚠️ Toxicity Warning

Toxic to pets

Planting Guide

Planting Methods & Timing

Planting Method

transplant

Indoor Start

8 weeks before last frost