Species garden phlox Guide
white-pink flowers with green leaves and stems

garden phlox

Phlox paniculata

Also Known As - border phlox,common phlox,common phlox

Cycle:

Herbaceous Perennial

Watering:

Average

Propagation:

Seed Propagation

Hardiness Zone:

4 - 8

Flowers:

Pink-purple to white Flowers In Summer

Sun:

Full sun, Part sun/part shade

Soil:

Rocky , gravelly , dry, Well-drained

Fruits:

brown Fruits In Autumn Ready In Fall

Leaf:

Yes

Growth Rate:

High

Maintenance:

Moderate

Drought Tolerant:

Yes

Salt Tolerant:

Yes

Invasive:

Yes

watering

Garden phlox requires moist, but well-drained soil. Water the plants deeply when the top 2 to 3 inches (5 to 7.5 cm) of soil are dry. During hot periods, water may be needed every 3 to 4 days. In cooler weather, the plants may require less frequent watering. Provide an additional deep soaking during extended dry periods. Avoid overwatering, which can lead to root rot and other diseases.

sunlight

Garden Phlox (Phlox paniculata) prefers to grow in areas that receive full sun to partial shade. However, garden phlox will produce larger and more abundant blooms when grown in full sun, which should be at least 6-8 hours of direct sunlight a day. Additionally, the leaves may turn yellow and become sparse in shade. When grown in full sun, garden phlox will produce the best flowers and the most vibrant colors. Garden phlox does not like hot summer temperatures; it should be planted in a spot that has at least some degree of afternoon shade. Also, this species of plant can tolerate some drought conditions once it is established.

pruning

Garden phlox (Phlox paniculata) should be pruned twice a year. In late winter or early spring, lightly prune the plant back to 1-third of its original size. This will encourage new growth and more flowers. In the summer, after the plant has finished blooming, prune the stems back to 6-8 inches to remove spent flowers and encourage branching. Once the plant reaches its desired size, prune only as needed to maintain its shape. This may mean pruning after flowering has finished in late summer or fall.