Both rhododendrons and hydrangeas are relatively pest-free in most cases. Let me explain. The U.S. is running short of people who can tell the forest from the trees. The country has a growing case of ‘plant blindness’—a term used by botanists to describe the inability to identify basic plants. la. There are 3 different types of hydrangea macrophylla; mophead, lacecap and mountain hydrangeas. At first glance, rhododendrons and azaleas seem to be nearly the same plant. An easier way to identify the difference is … Other Pins. Awareness of the potential plant diseases of each of these showy flower bushes can guide your preparation and care of your plants so that you can fill your garden with the brilliance of a healthy and beautiful floral display. Also called French hydrangeas, florist's hydrangeas, & hortensia. Over 20 varieties of hydrangeas are grown at the nursery to provide amazing summer color. But I didn't really know which flowers were the rhododendron… Hydrangea, Rhododendron, Azalea Collection by Christine Sinclair • Last updated 10 weeks ago. and rhododendrons ( Rhododendron spp.) They are relatively easy to grow and add so much to any landscaping theme. After pruning, mulch the plant with well rotted manure or compost. Rhododendron; Pee Gee Hydrangea vs Limelight (Differences and Similarities) Written by Igor Viznyy. Tamara Christine has written more than 900 articles for a variety of clients since 2010. Space plants 36 to 48 inches apart and 18 inches from the edge of the planting bed. Photo by Matt Suwak. Hydrangea? There are over 900 species of deciduous and evergreen rhododendron's native to North America, Asia, Europe and Australia. The Catawba rhododendron (Rhododendron catawbiense) and panicle hydrangea, (Hydrangea paniculata) work only for zone 8 gardeners. Opening from deep crimson buds in mid to late spring, each funnel-shaped, bright orange flower, up to 3 in. Hydrangea and Peony Their flowers are different. Rhododendron? Rhododendrons that don't receive enough fall water as well as protection from wind and sun sometimes suffer from sun scald during the winter months. Oakleaf hydrangea gets its name from its serrated oak-like green leaves but other species have rounded leaves. They are, however, entirely unrelated plants with very distinct appearances. are similar shrubs … In general, the common name azalea is given to those shrubs with deciduous leaves and funnel-shaped flowers. The botanical names of azaleas often include ‘ rhododendron’ in the name. Rhododendron? He has been writing on home, garden and design topics since 1996. How to Care for a Shooting Star Hydrangea, The Hardiness of Forever and Ever Early Sensation Hydrangeas, North Carolina Cooperative Extension: Rhododendron Prunifolium, University of Tennessee Department of Plant Sciences: Rhododendron Catawbiense - Catawba Rhododendron, North Carolina Cooperative Extension: Rhododendron Austrinum, Alabama Cooperative Extension System: Hydrangeas, University of Florida Nassau County Extension: Oakleaf Hydrangea, University of Florida Cooperative Extension Service: Hydrangea Macrophylla, University of Tennessee Department of Plant Sciences: Hydrangea Arborescens, University of Tennessee Department of Plant Sciences: Hydrangea Quercifolia, North Carolina Cooperative Extension: Hydrangea Arborescens "Annabelle", University of Missouri Extension: Growing Azaleas and Rhododendrons, University of Rhode Island Landscape Horticulture Program: Hydrangeas, Auburn University Horticulture Department: Hydrangea Macrophylla, Auburn University Horticulture Department: Hydrangea Quercifolia, Auburn University Horticulture Department: Rhododendron Indicum. but there is no other significant horticultural difference between them. Hydrangea and Rhododendron: How to Care for Your Plants. Hydrangeas, like rhododendrons, prefer a rich, moist, well-drained soil. Subscribe. Peony flowers are solitary, i.e., they do not grow in inflorescences. Rhododenron cultivars vary in terms of their winter hardiness. Hydrangeas (Hydrangea spp.) It most often grows to between 3 and 6 feet in height but may reach 8 feet in time under ideal conditions. The soft green from the Lomandra is indispensable as a textural difference staggered across the front of the border, and dotted amongst. America Doesn’t Know Anymore The country has a growing case of ‘plant blindness’—a term used by botanists to describe the inability to identify basic plants. Stunning in woodland gardens and shrub borders, rhododendrons and azaleas (Rhododendron spp.) Evan Gillespie grew up working in his family's hardware and home-improvement business and is an experienced gardener. Shape of the Leaves . are showy, flowering shrubs that, in some cases, have evergreen leaves. They also vary considerably in size. For example, one of the azaleas that belong to the Encore Azalea Series has the botanical name Rhododendron ‘Autumn Chiffon’. Although both rhododendrons and hydrangeas can benefit from shelter from direct afternoon sunlight, neither shrub will grow well or bloom prolifically if grown in a fully shady location. Depending on cultivar and season, you can find rhododendrons sporting flowers in hues from bright orange red, deep red, purple, yellow, cream or gold-orange among their large green leaves. My later comments apply equally to both subspecies. Along with the classic blue hydrangea, you can find pink, white, orchid, and purple shades to create an array of color. Hydrangeas can fall victim to bacterial wilt, root rot, bud or flower blights, or leaf spots. Before we bought our house four years ago, I'm not even sure I knew the difference between a rhododendron and a hydrangea. Guide to best rhododendrons. Rhododendrons tend to have their flowers in clumps known as ‘trusses’ and have 10 or more stamens. August 16, 2018. They ARE somewhat related though. Here’s our advice on pruning the different types of hydrangea. Marie Answer. Some of the most popular evergreen Rhododendron shrubs include the following. Some azaleas are evergreen in warmer climates, however. Hydrangea sizes range from the bigleaf at 2 to 6 feet tall and 4 to 6 feet wide to the panicle which can reach up to 20 feet tall. 1815. Growing up, my mom would say things like, "OHHH, LOOOOK at the RHODODENDRON!!! For either rhododendrons or hydrangeas, use a raised bed or mounds if drainage is an issue. Rhododendrons range from the Catawba, which can grow 6 to 20 feet tall and 5 to 8 feet wide, to the plumleaf, which grows 8 to 12 feet tall and 6 to 8 feet wide. Considering the size, appearance and planting instructions of rhododendron vs. hydrangea will help you decide which one will work best with your soil conditions and available space. If you’re looking at a shrub that is well over 6 feet (1.8 m.) tall, it is a viburnum. Quite often, they are even difficult to distinguish. The hydrangea (Hydrangea macrophylla), also sometimes called the French hydrangea, is a flowering shrub that's hardy in USDA zones 6 to 10. Gardening Questions . Both rhododendrons and hydrangeas are sensitive to soil pH, and both grow best in acidic soils with a pH level between 5 and 5.5. Pothos are classified as being any plants in the Epipremnum genus, whereas Philodendrons are well…in the Philodendron genus. In fact, without a powerful microscope, some of the differences between these plants are subtle (and somewhat inconsistent, since there are a few exceptions). Pee Gee and Limelight are two similar and very popular hydrangeas. Rhodi flowers are more bell shaped. They also share some preferences in terms of growing conditions. They are valued for their beautiful large long-lasting flowers. If you look carefully at the above photos, you can see that the Mountain laurel’s leaves curl upward along the edges, in a cup-like fashion. Hydrangea? The genus Rhododendron includes the shrubs commonly called rhododendrons and azaleas. are showy, flowering shrubs that, in some cases, have evergreen leaves. In neutral soils, the flowers are white or pale green. The flowers of French hydrangea will vary depending on the pH of the soil in which the shrub is growing. She holds a Bachelor of Arts in applied linguistics and an elementary teaching license. Iron deficiency or iron chlorosis that turns the leaves yellow can be a sign of an acid-poor soil, poor drainage, nematodes or other problems that injure the roots or stems. Azaleas usually have 5 stamens per lobe, and have 5 lobes in a flower. The Difference Between Azaleas and Rhododendrons. Difference Between Rhododendron & Azalea. She has more than 10 years experience teaching and gardening. Hydrangea anomala D. Don, Prodromus Florae Nepalensis. The flowers of French hydrangea will vary depending on the pH of … And, I would glance in the direction of blooming flowers and her excitement and say, "Yeah." Hydrangea macrophylla, H. serrata and H. quercifolia. Hydrangea bushes are some of the most popular deciduous shrubs on the market today. Lacecap hydrangeas such as Hydrangea macrophylla and the related H. serrata, plus H. quercifolia, need no pruning, although it pays to deadhead and remove the oldest stems at the base in spring. KEY TO THE SUBSI’R(’IRS a. Stamens 9-15; plants of the Himalaya and western and central China. The Difference Between Rhododendrons and Azaleas . Hydrangeas, however, are less sensitive and will tolerate soils with a higher pH. 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