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Phlox diffusa
Phlox diffusa
Phlox diffusa
Phlox diffusa

Phlox diffusa

TAXONOMY

FamilyPolemoniaceae
GenusPhlox
Zone4

ABOUT

Phlox diffusa, commonly known as spreading phlox or alpine phlox, is a subshrub in the family Polemoniaceae. It is native to the mountainous regions of western North America, where it thrives in temperate climates. This plant is known for its mat-forming growth habit and its beautiful, star-shaped flowers that bloom in various colors including white, pink, and purple. It typically enters a dormancy period during the winter months.

ALSO KNOWN AS

Phlox azurea
Phlox diffusa subsp. diffusa
Phlox diffusa var. diffusa
Spreading phlox

OVERVIEW

WaterDry
SoilLoamy
LightDirect Bright (6 Hours)
Temperature15° C
Humidity50%
Dormancy3 Months
pH6.5
Pressure1,013 mbar

DETAILS

Care Instructions
Phlox diffusa requires bright, direct sunlight for optimal growth. It prefers moderate temperatures and moderate humidity levels. Water the plant when the soil has dried out almost completely, but avoid waterlogging. This plant is best suited for outdoor growth in temperate climates.
Soil
Phlox diffusa prefers well-draining loam soil. Ensure the soil has good drainage to prevent waterlogging, which can lead to root rot. A slightly acidic to neutral pH is ideal for this plant.
Fertilizer
Use a balanced fertilizer with a nutrient composition of 5-10-10. Fertilize the plant during the growing season to promote healthy growth and flowering. Avoid over-fertilizing, as this can harm the plant.
Repotting
Repot Phlox diffusa when it outgrows its current container or when the soil becomes compacted. Choose a slightly larger pot with good drainage. Repotting is best done in the early spring before the growing season begins.
Propagation
Phlox diffusa can be propagated through stem cuttings or division. Take stem cuttings in the spring or early summer and root them in a well-draining soil mix. Division can be done in the early spring or fall by carefully separating the plant into smaller sections and replanting them.
Pruning
Pruning is necessary to maintain the shape and health of Phlox diffusa. Prune after the flowering period to remove spent flowers and any dead or damaged stems. This encourages new growth and helps maintain a compact form.
Toxicity
Phlox diffusa is not known to be toxic to pets or humans. It is generally considered safe to grow in gardens where pets and children are present.
Additional
Phlox diffusa is a hardy plant that can tolerate some drought once established. It is an excellent choice for rock gardens, alpine gardens, and as ground cover. Regular deadheading of spent flowers can prolong the blooming period.
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