Rhododendrons and azaleas, both from the genus Rhododendron, have long been mainstays of late spring because of their spectacular clusters of showy blooms—plus, large green leaves that often stay green through winter. Rhododendrons and azaleas are some of the most popular spring-flowering shrubs in the landscape, and healthy plants can give years of pleasure. They add drama and a pop of colour to your garden, and come in a range … One potential Rhododendron problem is that the leaves are turning yellow. Expecting his actions to have killed the Rhododendron imagine his surprise when a few weeks later he found the plant had re-established itself in the mulch and was looking better than ever. but the main flowering period is considered to be spring. If you are just cleaning up your rhododendron or wanting to ensure that your plant gets new flowers next season, you can prune right after your rhododendron is finished blooming. One of the concerns we hear from customers is that they don't have enough shade in their garden. More information on successfully growing azaleas and rhododendrons is available in the fact sheets HGIC 1059, Azalea Care; HGIC 1058, Azalea Planting; and … Early/Mid: 1.5m: Black Magic: Very dark red flowers held in neat trusses. Growing Conditions: Rhododendron’s prefer dappled shade, but can be grown in full sun if protected from afternoon sun or kept well watered. It is normal and there is nothing wrong with your rhododendron and you can't do anything to fix it. Mid: 1.2m: Christmas Cheer : Light to medium pink flowers on a well shaped bush. Can I use animal manure on my rhododendrons? Find your nearest store onlinesupport@palmers.co.nz … The perfume is magic, but you need to be able to provide good shelter from the frost to enjoy that marvellous perfume. Rhododendron species and hybrids flaunt themselves during the long flowering season (July – March). By elevating your garden and planting your rhododendrons above the clay level you will create an environment where they can thrive. If your whole rhododendron is changing colour to a pale green or yellow then you definitely need to address a nutrient deficiency. https://mailchi.mp/39b20d01923e/rhododirect-march-newsletter. A heavily mulched covering around the rhododendron. Both this spring and last spring, the plant produced buds, which then turned brown and fell off as the season progressed. Rhododendrons do need the sun however, and many varieties flower better with sunlight. The hardy, cool-climate Rhododendrons are very hardy throughout New Zealand with the majority preferring the cooler conditions of the south. Rhododendrons thrive in an environment where their root ball is moist. Epsom Salts* According to the American Rhododendron Society, if the plant has older leaves that have turned yellow between green veins, you likely have a Magnesium deficiency.Sprinkle some Epsom Salts* around the plant to correct the issue.. Iron Sulfate*. Use in mixed shrubberies for early colour. A medium sized Rhododendron with deep pink buds that open to yellow- pink flowers arranged in conical trusses. Established trees will provide a canopy over rhododendrons which helps to keep their roots moist. The 55th annual parade was scheduled for April 25, which coincides with peak blooming season for rhododendrons here on the North Coast. If your plant set buds, but didn’t bloom, the buds were probably frost-nipped or destroyed by cold, drying winds. Easy care filler for most gardens. Can we plant Rhododendrons if we have Clay Soil? In general, it’s common for most species (including hybrids) of rhododendrons and azaleas, to bloom in the springtime. Rhododendrons (​ Rhododendron spp. Rhododendron Flowering Season, Come visit our magnificent 4 hectare ..., Heritage Park, Kimbolton, Manawatu / Whanganui, 13 October 2015 - 30 November 2015 Rhododendrons are hardy, evergreen plants that flower from late winter to early spring. Make sure they are not shaded too heavily over the summer as this could inhibit flower bud set for the following season as well as encourage the plant to grow leggy and become sparsely foliaged. To find a rhododendron flower any time of the year, follow the Rhododendron Stroll, starting in the undercover Vireya Walk. This stops them trying to grow seed and will put all that energy into new growth and next season’s flowers. Thrips are the main pests of rhododendrons and azaleas. If you want a second opinion then email a photo of your rhodo to info@rhododirect.co.nz and we will take a look. If you have good drainage your rhododendrons will like it, if you don't, then you can create a better environment by planting the Rhododendron on top of the clay and not in it. Sometimes you might get bad frosts but have a very sheltered location for fragrant varieties to grow, like under the eaves or in a protected part of the garden. As you travel around New Zealand you will notice rhododendrons growing in certain environments that you might not recognise as being particularly textbook conditions. Sometimes the top soil layer will drain well, but there will be a hardpan underneath it that will not drain well. Free Draining Soil (this can be created by planting rhodos on top of the ground if needs be), Water and plenty of it, particularly in the heat, Acid soil (you can create it if you don't have it already). Generally, the conditions will have one of the above three points going for it. When they finish flowering you should prune or trim the spent flowering heads. If the same symptom appears in new leaves, then it is likely … It is a very normal part of the lifecycle of the rhododendron for leaves to discolour and fall off. Most frosts won't kill the plant, however, a severe frost will kill the plant too. ​) are popular flowering shrubs that bloom in the spring. (06) 368-5025. At the Dunedin Botanic Garden, the earliest flowering of these rhododendrons is on the edge of the track between the north bridge and the Cherry Walk in the Rhododendron Dell. Vireya rhododendrons, also known as tropical rhodos, are frost-tender but grow well under cover in colder climes. 3. So if you pinch those now, you will not have flowers in the spring. Suitable container plant, especially the more compact Yak varieties. Kurume azaleas make good low hedge and topiary features with light pruning. Mid: 80cm : China x Pilgrim x yak: Round trusses of mid pink flowers, almost cream in petal centres. 2. Pine needles have the added advantage of keeping the weeds at bay and of offering acidity that rhododendrons love. A good rule of thumb to abide by is if the area they are going in will be affected by a -4 degree Celsius frost, then don't plant them. Many diseases and other problems can be prevented by following the recommended cultural practices for proper planting and care. This is not a sure test but it will give you a good indication. 'Kotuku'. Narrow, deep green leaves. PLANT HEALTH. Vireyas don’t produce the massed show that’s so typical of the cold climate rhodos, but unlike their spring-blooming cousins, they continue flowering over many months. If heavy clay is present then dig a small hole and run some water into it; if the water does not disappear in a few minutes then you have poor drainage. The white blooms are rose pink in bud, it … Many customers plant trees in their gardens first and think that they will have to wait until the trees have provided shade before they can plant their rhododendrons. One grower tells the story of President Roosevelt in his garden that was looking decidedly terrible. KERRY CARMAN / NZ GARDENER Rhododendron Virginalis, also called Kotuku. Water, either by drip or sprinkler or any other system you have. Some Rhododendrons can start flowering from winter onwards in warmer areas of N.Z. The foliage of elliptic, flat, deep green leaves warms up to reddish-bronze in fall. Here is a quick guide to pests and diseases that Rhododendrons can be prone to. 2. Removing spent flower heads will encourage plenty of blooms the next season. The Number 1 most asked question - why do some of our rhoda's leaves go yellow, orange or red? Pests and Diseases. Eye-catching. You can have a garden that you can manage, and everyone can enjoy. My question is whether anything can be done to help my rhododendron, or should I remove it. Likewise other rhododendrons can be shifted into the backyard for the summer after they have finished flowering. There are any number of ways of doing this; if you provide one of the following you should do well. When Rhododendron Bushes Do Not Flower. Pukeiti displays hundreds of varieties of rhododendrons as well as complementary native and exotic plantings. Flower buds develop well ahead of their blooming and are almost always at the end of each branch. But many of the cool climate varieties will thrive in Auckland provided they receive the proper conditions. wide (5 cm), at the branch tips in early to mid spring. Most varieties hold their leaves for two years and then in the third year, as summer progresses and autumn nears, the lower leaves drop off the stems. Continue to 'White Pearl' or back to Pinks, Wainuiomata, 285 Moores Valley Road. Great ‘woodland’ plant, especially if mass planted with other suitable plants such as Hostas or Azaleas. (Mid- Season) Size: 3m x2m. A canopy of deciduous trees OR plenty of mulch for water retention is a PLUS! Instead spread it around well away from the rhodos roots and ensure it is well rotted. This could be either deciduous or evergreen or a mixture. Nearly all fragrant rhododendrons are frost tender. The mulch helps to keep the moisture near the roots and ensures that the roots don't dry out. About Rhododendrons & Azaleas The flowers are tubular-, funnel-, or bell-shaped—and often fragrant. Established trees will provide a canopy over rhododendrons which helps to keep their roots moist. These low maintenance plants have transformed thousands of gardens for New Zealand homes. Very compact plant, mid pink flowers in neat compact trusses. OUT OF STOCK: Very Late: 80cm: Baden Baden: Deep cherry red flowers. To submit a question or receive a personalised reply please email info@rhododirect.co.nz your question will be answered by Lisa Williams - owner of RhodoDirect Nursery. Under-plant trees. YELLOWING OF LEAVES AND NATURAL LEAF FALL IN AUTUMN Rhododendrons, although evergreen plants, do lose some of their leaves. According to most professional landscapers, the ideal time for pruning rhododendrons is late winter, while the plant is dormant. A good mulch or gentle hand weed will take care of any weeds. Rhododendrons do need the sun however, and many varieties flower better with sunlight. With such a wide range of colours (from whites, through pinks, yellows, oranges to lavenders, blues and purples) and a range of sizes from small compact shrubs to large trees, there is a Rhododendron to suit most situations. Don't let having clay soil stop you enjoying a rhododendron garden. This happens after a leaf has been on the plant for 3 years. Season Height ; Arthur Osborn : Low compact bush, bright red flowers appear in January. The feeder roots of rhododendrons are near the surface, no more than 10cm from the base of the plant. There is nothing wrong with your rhododendron unless all the leaves are changing colour. Do we need established shade from trees before planting? Easy care filler for most gardens. On the West Coast of the South Island, you will find huge rhododendrons growing in random places, like in the middle of a paddock, or beside an old derelict house where no-one lives. 3. This will be in late spring or early summer, or whenever you notice its flowers dying and no new ones starting to grow. Like many plants in the landscape, rhododendrons have very specific needs that must be met before they will bloom freely. However, be aware that rhododendrons like free-draining conditions so ensure that water doesn't build up in their roots and that the plants are not sitting in pools of water. This semi-dwarf evergreen shrub bears elegant, widely funnel-shaped, double, purplish-red flowers, up to 2 in. Today is … Many of the vireya flowers come in shades of orange and salmon as well as the more traditional rhododendron pink and white. However, any time between the first frost in fall and the last frost in spring (while the sap is low) will work. We recommend that you consider carefully before choosing a fragrant variety. For more comprehensive information visit our fertiliser advice page. Brilliant early season colour. Avoid weeding or cultivating around your Rhododendron as this can break the fine roots. Rhododendron are evergreen, flowering from late autumn to early summer. (04) 564-8391        Levin (Ohau), 132 McLeavey Road. Note that if a plant dries out completely no amount of water will nurse it back to health. Brilliant early season colour. This is not the case - no waiting is required if you do it right. And with flowering times that range from mid-winter to mid-summer it might be hard to stop at only one or two varieties. To achieve the desired result use plenty of mulch, leaf matter, pea straw and pine needles. In Season: Rhododendron While they have a ubiquity that can make you take these spring flowering shrubs for granted, there are at least three reasons why you need to plant (or plant more) rhodies: Astonishing spring flowers that come in a range of sumptuous colors and seem to appear from out of nowhere after a long, cold winter. Leaf matter, bark, pea straw or pine needles are all options. Vigorous and compact. As a selected form of the species Rhododendron maddenii, this hardy cultivar is unusual for its perfumed flowers. In frustration and anger he ripped the Rhododendron out and tossed it up the bank. Create a beautiful outside space to relax in with stunning Rhododendrons. A frost will damage the flower buds, and once damaged they don't recover, they just fall off the plant. Shade overhead. Azaleas can benefit from a trim after flowering to keep them bushy and promote fresh growth. Water, either by drip or sprinkler or any other system you have. But it is not going to bloom again this year. Many individuals who would dearly love to grow rhododendrons have steered away from them because of their clay soil. Slightly fragrant and exceptionally cold hardy, Rhododendron 'April Rose' is prized for its early spring blooms. For at least two years in a row, a dwarf rhododendron in my front area has failed to bloom. What do I need to grow rhodos? You can use animal manure but be careful not to burn the fibre roots at the top of the rhodos root ball. If my property has late frosts can I  plant fragrant varieties? Either: If you don't have shade or mulch then you will need to keep the moisture up to the roots through watering. The Rhododendron has thrived probably because of the high rainfall of the West Coast. This could be either deciduous or evergreen or a mixture. Shade overhead. Mid: 75cm: Bibiani : Waxy, dark red flowers. 1. Blooms over a long period. A very reliable performer, this Lepidote Rhododendron is tough and can withstand te… Yes, in my experience a bit of browning leaf edges is not uncommon. Very Early: 1.2m: Coral Skies: Large, reflexed, frilled flowers, coral pink, rose in throat. On noticing this he went around his garden and lifted all the sad looking rhododendrons so that they were now sitting on top of the soil in the heavy layer of mulch. Their spasmodic flowering always comes as a surprise and hot colours of oranges, yellows and reds give them an exotic appeal. Some times of the year it is more noticeable and often it is noticed because it is just a few leaves changing colour. This is a group of R. magnificum hybrids which, in fact, began flowering in mid July. 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