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Phlox, Genus, divaricata, Species,

Genus & species

woodland phlox

Polemoniaceae

Eastern North America, from Quebec south to Georgia and west to Texas

Attracts Pollinators Attracts Butterflies Attracts Hummingbirds Fragrant (light)Container Friendly

SunPart Shade – Full Shade

WaterMedium

HardinessZones 3–8

Overview

Phlox divaricata is a native woodland phlox that grows 10–15 inches (25–38 cm) tall and spreads by stolons to form a low, semi-evergreen ground cover. Loose clusters of soft blue to lavender-blue five-petaled flowers 1–1.5 inches (2.5–4 cm) across with a light sweet fragrance carpet the woodland floor in April and May — creating the signature blue color of the eastern spring forest. The species name 'divaricata' means 'spreading', describing the stoloniferous growth that gradually extends the colony. After flowering, the plant maintains a low mat of semi-evergreen medium green soft lance-shaped foliage through summer and into winter. The eastern woodland origin means the species thrives in the conditions that many garden perennials cannot tolerate: dappled shade under deciduous trees, moist humus-rich soil, and competition from tree roots. The spring bloom coincides with the window before deciduous trees leaf out fully — the flowers receive maximum light during the leafless canopy period. Unlike the tall garden phlox (P. paniculata), woodland phlox is not susceptible to powdery mildew. The spreading habit fills gaps between taller woodland perennials and creates a blue spring carpet. Deer may browse the soft foliage.

Native Range

Phlox divaricata is native to eastern North America, from Quebec south to Georgia and west to Texas. It grows in moist deciduous forests, along streams, and on wooded slopes.

Suggested Uses

Used as a woodland ground cover, along shaded paths, and under deciduous trees. The spring blue carpet is the signature of the eastern shade garden. Naturalizes gradually to fill woodland areas. Pairs with yellow woodland flowers like trillium and Virginia bluebells for a blue-and-yellow spring combination.

How to Identify

Identified by soft blue to lavender-blue five-petaled flowers in loose clusters on a low, spreading, semi-evergreen mat in spring shade. The spring woodland bloom timing, low spreading habit, and the soft blue color are diagnostic. Distinguished from the creeping P. stolonifera by the taller flowering stems (10–15 inches / 25–38 cm vs. 6–8 inches / 15–20 cm) and the larger flowers.

Appearance

Size & Dimensions

Height10" - 1'3"

Width/Spread1' - 1'6"

Colors

Flower Colors

Foliage Colors

Fall Foliage Colors

Bloom Information

Bloom Period

~4 weeks

Flowers: April–May

Spring

Flowering in April and May, approximately 4 weeks. The blue spring carpet peaks when deciduous canopy trees are still leafless.

Detailed Descriptions

Flower Description

Soft blue to lavender-blue, five-petaled, in loose clusters

Foliage Description

Medium green, soft, lance-shaped, slightly pubescent

Growing Conditions

Sun Requirements

SunPartial Shade SunFull Shade

Requires 2-5 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 - 7.0 (Neutral)

3579

Soil Types

loam

Drainagemoist

Water & Climate

Water Needs

Medium

Frost Tolerance

hardy

Care & Maintenance

Care Guide

Plant in partial to full shade with 2–5 hours of filtered light under deciduous trees. Moist, humus-rich, well-drained soil. Mulch with leaf mold. Water during dry spells. Shear lightly after bloom to encourage dense mat growth. The stoloniferous spread gradually fills the woodland floor.

Pruning

Shear lightly after bloom to tidy the mat. No other maintenance needed.

Pruning Schedule

Prune: June

summer

Container Growing

Suitable for container growing

Minimum container size: 3 gallons

Toxicity

Non-toxic

Related Phlox species