Caring for Your Phlox

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Description: With its aromatic, bright, and showy long-lasting flower clusters Phlox paniculata has become a staple in today’s landscapes. Garden phlox is one of the most recognizable and widely grown perennials.

Recent breeding efforts have brought several improvements to this already popular species of perennial plants including a wide range of flower colors available, improved plant habit, and increased resistance to diseases.

Garden phlox is the backbone of the summer perennial border and is also a great perennial for open sunny locations. The striking and fragrant trumpet-shaped flower clusters appear in the mid-summer and always deliver a spectacular display of color when they are blooming. Today’s cultivars produce a wide range of flower colorations consisting of various hues of lavender, orange, pink, purple, red, salmon, scarlet, and white. Many cultivars have contrasting colored eyes or bicolor blooms.

Maintenance: Phlox are easy to grow and only require few maintenance activities. It is recommended to remove the flower heads when they are done flowering. Taller cultivars may need additional support from cages or staking to prevent the flower clusters from lodging. To reduce the occurrence of powdery mildew, thin or divide large clumps every year or two to improve the air circulation around the plants.

Pests and Diseases: Some of the most common insect pests that may be observed feeding on Phlox include aphids, beetles, caterpillars, grasshoppers, leafhoppers, leafminers, and spider mites, whiteflies. Most of these pests, under normal circumstances, do not cause significant injury to garden Phlox.

Garden phlox are susceptible to several pathogens including fungal leaf spots, powdery mildew, and stem canker diseases. Of these diseases, powdery mildew is observed most frequently. There are great differences between cultivars in their susceptibility to powdery mildew. Even highly resistant cultivars may succumb to this disease under severe or optimal conditions for disease development. This occurrence of this disease can be reduced when the plants are planted in areas with good air circulation, the plants are not crowded, and by avoiding overhead irrigation (wet foliage).

Uses in the Garden: Garden Phlox are commonly used as accent or aromatic border plants. They are also resistant to deer.

Other Uses and Attributes: This Native American perennial attracts butterflies and hummingbirds into the garden. Phlox makes and excellent cut flower and offers an excellent vase life. Many of the smaller cultivars make nice container or patio pots.

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