Phlox how tall

Soft, baby pink flowers make this perennial phlox a beautiful ground cover. Plant in full sun for best flowering. Large heads of pure white flowers float like clouds among the other perennials in the summer garden.

Showy, fragrant lavender-blue flowers bloom on this mounding perennial phlox. Use as an alternative to vinca. Photo by: Proven Winners. Few plants can perk up the languishing midsummer landscape like phlox. Use them wherever you need to add a punch of color. Get plant information, gardening solutions, design inspiration and more in our weekly newsletter.

More about the newsletter. Copyright All Rights Reserved. Reproduction in whole or in part without permission is prohibited. Get planting advice, garden design tips and trends, monthly checklists for your area, product specials and more in our weekly newsletter.

Subscribe No Thanks. From tools to furniture, these garden products are sure to delight. Enter plant spacing Inches. Calculate Plants Needed. Plants Needed. Shipping Information K. We take advance reservations, and then just as soon as the crops are harvested, our staff of K. Customer Reviews. Customer Photos. Sign up for emails You'll get the latest deals and gardening tips from K. Gardening resources Questions? Ask Us! About K. Follow Us Online.

The best soil to use in a container is a potting mix, since this product drains well. Avoid using garden soil, which is too likely to become compacted in a container. The result of compacted soil will be root rot caused by inadequate drainage, which can be fatal to your plant.

There are many varieties of phlox , although people generally think of either the commonly-grown creeping phlox Phlox subulata or of garden phlox Phlox paniculata. Phlox subulata stays short and creeps, while garden phlox is tall and upright. As a result of these physical differences, the two are used differently.

Creeping phlox is a ground cover , whereas garden phlox, with its greater height, is more likely to be found in the middle row or back row of a flower bed.

Another difference between the two is that creeping phlox is a spring bloomer, while garden phlox is a summer bloomer. Furthermore, Phlox subulata has needle-like leaves, some of which remain green throughout the winter, while the leaves of garden phlox are much larger and die back at the end of the growing season; they are narrow at both ends and flare out in the middle.

Other types of phlox include :. Garden phlox is susceptible to powdery mildew , a fungal disease that thrives under hot, humid conditions. Some cultivars of garden phlox, such as 'David,' are relatively mildew-resistant; grow these cultivars whenever possible.

Other steps that you can take to prevent powdery mildew include:. Cox, Jeff. Rodale Press , Actively scan device characteristics for identification. Use precise geolocation data. Select personalised content. They make excellent ground cover and are often grown in a rockery. Annual phlox, such as Phlox drummondii , are ideal as bedding plants or for growing in containers and are often grown from seed. Most border phlox do well in a sunny spot in moist, well drained soil.

They are sensitive to drought, so them keep well watered in hot, dry weather. They need little care, although deadheading promptly may result in more flowers later in the season, and dividing every few years will keep the plant healthy and flowering well.

Alpine phlox need plenty of sun and well drained soil. Woodland phlox need shadier conditions. Grow your phlox in a sunny spot or in partial shade, in moist but well-drained soil.

Taller varieties are suitable for the back or middle of a border, shorter varieties at the front. Plant phlox in spring or autumn, while the soil is warm and moist. Phlox gradually form large clumps in the garden. To keep your plant growing well and to prevent it from becoming congested, divide it every three or four years, in early spring. Replant the clumps around 60cm apart.

Signs that your phlox needs dividing are fewer flowers and a sparse centre. Deadheading immediately after flowering might result in more flowers produced from side shoots in autumn. Cut on the diagonal, just above a leaf joint. This will delay flowering by about a month. You can increase your stock of phlox plants is by dividing them in early spring.