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Blue Phlox

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description Blue Phlox Overview

Blue phlox (Phlox divaricata), also called woodland phlox, is a semi-evergreen perennial native to deciduous forests of eastern North America from Canada to the Gulf Coast. It grows 12 to 15 inches tall and produces clusters of fragrant, five-petaled flowers in shades of blue, lavender, and occasionally white during mid to late spring. The plant spreads by creeping stolons and leafy stems, making it suitable as a groundcover for shaded woodland gardens where it blooms before tree canopies fully leaf out.

help Blue Phlox FAQ

How much shade does Blue Phlox need?

Blue phlox (Phlox divaricata) prefers partial to full shade, making it well suited for woodland gardens and shaded borders. In its native eastern North American forests, it naturally grows under the dappled canopy of deciduous trees, benefiting from spring sunlight before full leaf-out.

Does Blue Phlox spread in the garden?

Yes, blue phlox spreads gradually by creeping stolons (above-ground runners) and can form attractive loose mats over several seasons. It is non-aggressive and coexists well with other woodland perennials, making it a reliable shade ground cover.

Does Blue Phlox have a fragrance?

Blue phlox is widely valued for its strong, sweet fragrance, which intensifies in the evening to attract moth and butterfly pollinators. Gardeners often plant it near walkways or patios to enjoy the scent during its April-to-June bloom window.

Is Blue Phlox deer resistant?

Blue phlox is considered moderately deer resistant, as deer tend to avoid its slightly hairy foliage in favor of more palatable plants. However, in areas with heavy deer pressure, no plant is fully immune and browsing may still occur, particularly on tender new spring growth.

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