The Phlox genus encompasses nearly 70 species, and includes annuals, perennials and shrubs. Phlox has rather fine roots that are a bit more fiddly to take cuttings from, but the technique is generally successful. If mildew does affect the plant, it is best cut down to soil level. ‘Prince of Orange’ is an erect, herbaceous perennial up to 80cm tall. Most types of Phlox paniculata provide plenty of pollen and nectar for pollinating insects. Deadhead the plant and take out any damaged or untidy stems through the summer to encourage fresh growth and more flowers. A shorter, sturdy and self-supporting variety, ‘Grenadine Dream’ grows up to 60cm high. The flowers are pollen and nectar-rich, and they attract hordes of pollinators such as honey bees, bumble bees and butterflies. Some phlox varieties are more susceptible than others and because it's a widespread problem newer varieties have been developed with resistance or tolerance, usually indicated on the plant tag. Space them out well, at least 30cm apart and away from other plants, to ensure good ventilation, as they are vulnerable to mildew. We aim to enrich everyone’s life through plants, and make the UK a greener and more beautiful place. It produces panicles of very fragrant, vibrant, orange-red flowers in mid summer. These are typically white, pale lilac or darker purple and continue to appear throughout the summer and into the early autumn. Water the soil around the plants well in the morning to allow any splashes on the leaves time to dry out before the conditions become more humid around nightfall. Flowering takes place from early to mid summer. Badly infected lower leaves become discolored and distorted, then (drop)off. Affected plants can be used to take root cuttings before destroying them if desired. Slugs can be a problem with fresh spring growth. Separate the clump into sections, discard the old, woody centre, and plant the sections into the border straight away, watering in well but not waterlogging. They should be planted in a sunny or partially sunny location. Split stems or distorted, misshaped leaves are likely to be signs of stem and leaf eelworm infestation. It has dark green leaves and terminal panicles of fragrant, white-eyed, light lilac flowers with pale-edges to the petals. ‘Rosa Pastell’ grows up to 70cm high. Ensure the compost in the pot matches the level of the surrounding soil when preparing the hole and planting out. The plant needs very good, rich, well-drained soil. The plants not only produce an abundance of colour but also a delicious fragrance that evokes the very essence of a traditional English cottage garden. Most phlox cultivars are perennial. A bushy, upright herbaceous perennial growing up to 1m high, ‘Miss Ellie’ has dark, lance-shaped leaves and exuberant panicles of fluffy, rose-pink and fragrant flowers from mid to late summer. Discover seven great varieties of phlox, below. The variety has dark stems and striking, loose heads of dark pink buds that open into highly scented, pink flowers with a darker eye throughout the summer. Placing the tray on a warm surface will hasten growth, but it is likely to be mid-summer before roots are sufficiently established for the cuttings to be grown on. Review your feeding regime, and in the first instance give the plant a good dressing of bone meal. 222879/SC038262. Oedema is a root function problem. As with most plants, phlox do encounter problems with insects and diseases. The following list includes some of the most popular, reliable and widely available cultivars. It is unsightly, but rarely kills phlox. Cultivars of alpine phlox, such as Phlox subulata, thrive in full sun and well-drained soil.Those from woodland habitats, such as Phlox divaricata, need partial shade and hummus-rich soil.Those native to boggy areas, such as Phlox paniculata, require full sun and moist soil.. RHS Garden Hyde Hall Spring and Orchid Show, Free entry to RHS members at selected ‘Grey Lady’ is a bushy but upright perennial, growing up to a height of 1m. Cut the stems down in late autumn to tidy up the plants and carefully collect and remove any fallen and dead leaves. All have been given the RHS Award of Garden Merit following a range of horticultural trials over many years. While not generally grown in containers, phlox can make a colourful addition to a mixed summer patio planter, though the plants will still need air circulation and space if mildew is to be kept at bay – not always easy in a crowded planter. ‘Monica Lynden-Bell’ is another shorter variety, reaching up to 80cm in height. Established plants will deal with temperatures below freezing, Rich, moisture retentive but well drained loam, Blood, fish and bone in spring and water soluble fertiliser in autumn, Slugs, eelworm, mildew and other fungal infections. Phlox arrived in the UK as a garden plant from its native North America in the early 1800s and soon became a firm favourite for the summer herbaceous border. This disease is first noticed by the powdery white spots or coating on plant tissues. ‘Le Mahdi’ is a clump-forming herbaceous perennial to 1m tall, with dark foliage and panicles of fragrant violet-blue flowers. Join the RHS today and support our charitable work, Keep track of your plants with reminders & care tips – all to help you grow successfully, For the latest on RHS Shows in 2020 and 2021, read more, RHS members get free access to RHS Gardens, Free entry to RHS members at selected times », Reduced prices on RHS Garden courses and workshops, Our Garden Centres and online shops are packed with unique and thoughtful gifts and decorations to make your Christmas sparkle, General enquiries Root cuttings are taken during early spring or in November. The fragrant flowers are a delicate pale pink with a pearlescent quality. Herbaceous perennials are generally grown in uneven-numbered groups for best effect, assuming there is room in the border. Only take cuttings from vigorous and healthy plants to avoid spreading or perpetuating disease, especially viruses. Many different colours have been produced, although the most common varieties are generally white, pink, blue or purple. The best way to prevent mildew is to keep the soil rich by mulching generously in the spring. Neither is terminal, and infection can be avoided or reduced through good care of the plants, ensuring they do not suffer water stress, providing adequate ventilation, and not watering late in the day. Borders were traditionally laid out with the taller plants at the back, mid-size types such as phlox in the middle and shorter plants at the front. To take root cuttings, dig up the plant with as much of the root-ball intact as possible. If the plant seems green, lush and generally healthy, it may well be that the nitrogen to phosphorus ratio in the soil is skewed, favouring the production of foliage over flowers. This article focuses on caring for the upright, herbaceous, perennial phloxes. Cover them shallowly with compost. It produces an abundance of clusters of scented, cerise flowers throughout the summer. Phlox prefers a position in full sun, though it will still grow well in a little light shade. A shorter, robust and weather-resistant variety up to 70cm tall, ‘Danielle’ produces clean white flowers with a wonderful scent over an extended period throughout the summer. With long lasting, reblooming flowers in a variety of colors that attract butterflies, hummingbirds and other pollinators, garden The species Phlox amplifolia also performed very well, though it is not widely available in the UK. Phlox. It is earlier flowering than most, blooming from the beginning of summer. Once flowering stems have finished, they can be cut off to keep them looking tidy. What is the problem? Propagation of the cultivars is easiest by division or root cuttings. Most of the perennial varieties are upright, but a few species are mat forming. The hybrid ‘Miss Mary’ grows up to 1m in height, and has more oval-shaped leaves than most garden phloxes. Phlox is very easy to grow and requires little attention, though plants can take a couple of years to establish fully and reach their maximum potential. It produces loose, branching clusters of five-petalled flowers (or panicles, hence ‘paniculata’). Garden phlox, or Phlox paniculata, is a perennial that blooms in late summer and comes in a variety of colors. The flowers of  ‘Jeana’ are amongst the smallest of all phloxes, though they are nevertheless attractive to gardeners as well as insects.