The Volcano® series of fragrant, abundantly-flowering, compact Phlox has been bred for high levels of natural disease-tolerance. This is wonderful news for Phlox fans, who until now have often had to deal with powdery mildew when growing other Phlox varieties.
Volcano® Phlox White is a compact plant that grows to 24-28 inches high and has brilliant, pure white flowers on sturdy upright stems. As with all the Volcano® Phlox series, Volcano® Phlox White is cold hardy to zone 4, but performs equally well up to zone 10.
- Spectacular pure white color
- Masses of large, fragrant flower clusters
- Compact and low-growing with sturdy stems
- Flowers from June through September
- Ideal in garden beds, borders and containers
- Grow in full sun or partial shade
- Superior mildew tolerance
Ideal summer color for planting in garden beds and borders and container plantings. Excellent in commercial landscapes.
Compact, branching. Basal growth, branching habit. Upright clump with strong upright stems that don’t require staking.
When mature, 24 to 28 inches tall, up to 24 inches wide.
Up to 1-inch in diameter.
24 to 28 inches tall.
24 inches wide.
Plant 12- to 16-inches apart to help natural tolerance to mildew.
Hardy in USDA zones 4 through 10.
Flowers early Summer until Fall. To prolong blooming, cut back by 2/3rds after first flowering.
Number Of Flowers
Large, multi-branched flower clusters, comprised of up to 125 flowers or more per stem.
Pure white flower.
Narrow, pointed lance-shaped leaves up to 5 inches long.
No pinching or pruning necessary in the home garden.
Phlox performs best with warm day temperatures and cool night temperatures. Optimal day temperatures range from 75-80ºF. Optimal night temperatures range from 50-60ºF.
Performs best in full sun (six hours of sun daily), but will tolerate partial shade (minimum four hours of sun daily). Best in partial or full shade in hot climate zones.
Volcano phlox will tolerate a range of soils but will perform best in a well-worked fertile soil.
Will tolerate moderately dry conditions. Performs best when well-watered. Watering at the base with a soaker hose is encouraged. Overhead watering, or watering at night can promote conditions conducive to mildew.
In Spring, use a slow release balanced plant food suitable for flowering plants.
Very tolerant but not entirely impervious to mildew.
Phlox can be affected by spider mites and thrips.
Volcano phlox are very mildew tolerant, but it’s good gardening practice in general to take steps to avoid conditions that can promote mildew. Follow spacing recommendations when planting. Crowded plantings can reduce air circulation and promote mildew. Water phlox at the base of the plant and not from above. Soaker hoses are great. Never water your garden at night, as this promotes mildew and other diseases in all plants in your garden. Morning is the best time to water the garden. In zones 4 – 9 divide Volcano Phlox every 3 to 5 years or when the plant looses vigor or the center of the clump starts to die. Divide in early spring for best results.
Selection of Phlox paniculata.