If you’re looking for a high-impact, long-blooming perennial with low water requirements and amazing diversity, penstemon, or beardtongue, is a top contender. Hardiness: frost hardy (will need winter protection in cold areas) Elegant spikes of small, tubular, foxglove-like flowers appear from July to October among lance-shaped, bright green leaves. Border penstemons are easy to grow in any fertile, reasonably moist, free-draining soil in full sun or light shade. PENSTEMON – SENSATION MIXED. You should cut back the spent flower spikes in order to promote re-blooming. Cultivation Advice PENSTEMON – SENSATION MIXED Some of the other problems encountered include frost damage and powdery mildew. As a group they are short-lived, but the darker-flowered selections tend to grow longer. P. 'Apple Blossom' AGM: Panicles of bell-shaped pale pink white-throated flowers,with narrow semi-evergreen foliage. ‘Andenken an Friedrich Hahn’) is a particularly elegant penstemon, bearing slender, foxglove-like flowers in wine-red, from July to October, against fresh green leaves.Like most penstemons, it’s perfect for growing in a mixed herbaceous border or in pot on the patio, and its blooms are a magnet for bumblebees. Make sure that the danger of frost is over and the soil where you are going to sow the seeds is warm. Each spring apply a balanced, general-purpose fertiliser at the rate of 70g per sq m (2oz per sq yd), followed by a 5-8cm (2-3in) mulch of well-rotted organic matter to help promote strong healthy growth. Penstemon are low maintenance plants that provide a long display of colour in the garden. Probably the most winter-hardy, resilient Penstemon we have ever found! Tolerant of drought, heat, and poor soil. It’s recommended for USDA hardiness zones 6 to 8, which includes most of central North America. Penstemon. They are easy to grow and propagate and most are hardy enough to make it through a cold British winter. Cuttings are the best method when propagating a named cultivar, as these do not come reliably true from seed. Many varieties of penstemon are hardy in all but the harshest winters, but do move plants under cover or take summer cuttings to ensure they make it through winter. 'Alice Hindley' 8/10. These plants will enjoy growing in loose gravelly soil and can also be grown on raised beds, slopes or hillsides. P. 'Raven' AGM: Has rich, sultry purple blooms set off by the white throat. Native to Arizona and northern Mexico. They are suitable for border planting, rock gardens, woodland gardens, and a must for any cottage garden. We like it with Agastache ‘Purple Haze’. If you have any comments or know of additional references, please e-mail us at our address below. trial 1994–97. 222879/SC038262, Trim them once the hard, winter weather is over (usually in late April or early May); until then old stems provide valuable frost protection for the new shoots, In spring, when new shoots appear at the base, remove the old flower spikes and any suitable material can be used as cuttings, In autumn, limit windrock and tidy up borders by cutting back penstemon by about a third, being sure to leave enough foliage to provide winter protection, In mid-spring, check plants for new shoots at the base or along the stems, Where shoots are growing from the base, cut out all the old stems close to the bottom, Penstemon with few or no shoots growing from ground level should only have their stems shortened, making the cuts just above the lowest set of healthy leaves, Once a plant has been pruned, remove weeds and other encroaching plants, Take non-flowering tip cuttings of about 10-12.5cm (4-5in) long and trim with a sharp knife to just below a leaf node, Gently remove the bottom two leaves and trim the top and side leaves by up to one-third to reduce leaf surface area and, in turn, moisture loss, Dip the cut ends in hormone rooting powder and insert in a 50:50 mixture of compost and perlite, Up to five cuttings can be inserted into a 9cm (3.5in) pot, or modular trays can be used for larger quantities, After rooting, they can be left undisturbed over winter or individually potted on. times, RHS Registered Charity no. Adding a general or organic fertiliser while planting is ideal and you can feed penstemons with fertiliser once every four to five weeks during the blooming season. (April 1 in Denver, April 10 in Golden & Parker) Height 60cm (2ft); spread 45cm (18in). Penstemons are one of the most valuable late summer-flowering perennials and, in all but the coldest regions, are easy and reliable. If you are a person interested in gardening or a person handling the potting mixes, Propagation of ferns can be done easily using the spores. It is therefore advisable to propagate some fresh stock each year in late summer and keep it in frost-free conditions until the following year. Product is Out of Stock Prune it back in late summer so it … Size: 3' 0" high x 2' 0" wide. However, this mainly depends on the type of penstemon. If you have any comments or know of additional references, please e-mail US at address. In frost-free conditions until the following year ‘ Sour Grapes ' M. 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