How to Grow and Care for Garden phlox

Garden phlox, also known as Summer phlox, Fall phlox, Perennial phlox, Tall phlox, Border phlox

Garden phlox thrives in well-draining, fertile soil with consistent moisture. It requires full to partial sun exposure for optimal growth. A special care point for garden phlox includes deadheading spent flowers to promote further blooming and prevent self-seeding. Additionally, providing good air circulation is key to prevent powdery mildew, which garden phlox is prone to, especially in humid conditions.

Watering schedule: Every week

Sunlight Requirements: Full sun

In This Article

Planting and Growing Garden phlox

Toughness	High
Care Level	Medium
Care Difficulty	Easy
Lifespan	Perennial, Annual
Watering Schedule	Every week
Sunlight Requirements	Full sun
Soil pH	6-7.5
Planting Time	Spring, Early summer
Hardiness Zones	4-9

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Varieties of Garden phlox

Garden phlox 'Prospero'

"Prospero" is Latin for success, and this pretty garden phlox hybrid is certainly that. Garden phlox 'Prospero' produces rich white-centered flower heads of pale lilac in summer. By contrast, the parent plant's flowers are a darker purple shade in the wild. This medium-sized shrub grows well in informal gardens, borders, and beds.

Garden phlox 'Albert Leo Schlageter'

The garden phlox 'Albert Leo Schlageter' has a distinctive bright red color which distinguishes it from other phlox hybrids. A complex hybrid from Phlox paniculata and Phlox divaricata that is named after the German war veteran Albert Leo Schageter, the garden phlox 'Albert Leo Schlageter' is popular with horticulturalists as it is long-blooming and long-lasting, making it good for perennial borders.

Garden phlox 'Mount Fuji'

Garden phlox 'Mount Fuji' is a perennial flower known for its large, fragrant clusters of white blooms that resemble the snow-capped peak of its namesake. Thriving in well-drained soil, it stands tall with erect stems reaching up to 2-4 feet in height, inviting butterflies and hummingbirds to its nectar-rich blossoms through summer into early fall.

Garden phlox 'Alexandra'

Garden phlox 'Alexandra' features vibrant pink flowers arranged in dense clusters atop sturdy stems, contributing to its striking appearance. Characteristically hardy, it thrives in well-drained soils with full sun or partial shade, drawing butterflies and hummingbirds. An adaptable perennial, it excels in mixed borders or as an eye-catching standalone in gardens.

Garden phlox 'Roberta'

Garden phlox 'Roberta' is a flowering plant that produces bright scarlet flowers, in marked contrast to the white or purple flowers of the native plant. While the parent often grows up to 1.2 m, this hybrid reaches just 60 cm. Like many plants with pretty flowers, this hybrid has been given a popular ladies' name. The plant grows well in full or partial shade.

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More General Info About Garden phlox

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Garden phlox is a vigorous, stalky perennial reaching heights of 2 to 4 feet (60 to 120 cm) with a similar clump-forming spread. It exhibits a profusion of blossoms in hues that span from pastel to vibrant, often seen from mid-summer through mid-fall. The individual flowers are notably grouped in dense, pyramidal clusters atop upright stems, which emerge from a bed of lance-shaped, medium-green foliage. This species is particularly favored for its showy blooms and ability to attract pollinators like hummingbirds.