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Volcano® Ruby Phlox

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A superior selection with a compact habit, sturdy stems and a high tolerance of powdery mildew that is exceptionally floriferous. Ideal for borders along driveways and paths, in mass in garden beds and in patio containers. A fine cut flower.

Photo credit: Anthony Tesselaar


  • Full Sun, Partial Sun

  • High

  • Height
    2 feet or less

  • Spread
    1—2 feet

Availability: Out of stock



Follow a regular watering schedule during the first growing season to establish a deep, extensive root system. For a neat appearance, remove old foliage before new leaves emerge. Divide clumps every 2 to 3 years in early spring.

Brand Monrovia
Botanical Name Phlox paniculata 'Barthirtyone' P.P.# 16218
Plant Type Perennials
Plant Subtype MID SPRING INTERMIDIATE FLOWERING
Foliage Color Green
Light Needs Full Sun, Partial Sun
Water Needs High
USDA Cold Hardiness Zones 4 - 9
Height 2 feet or less
Spread 1—2 feet
Habit Compact
Special Uses Flowers for Cutting, Improved Pest and Disease Resistance, Long Bloom Season, Showy Flowers
Landscape Uses Border, Firescaping/Fire Wise
Flower Color Red
Bloom Time Summer

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