Their list includes 44 hybrids (cultivars) that grow 1 foot in ten years, 164 that grow 2 feet, 366 that grow 3 feet, 281 that grow 4 feet, 288 that grow 5 feet, and so forth. As with any plant, regardless of type or size, maximum growth rates are only achieved when optimum growing conditions are present. Whether you imagine your own rhododendrons becoming similarly imposing and unruly or want to keep them trim and in check, there’s no denying that they have the ability to grow quickly and overspread in an area when left to their own devices. Some varieties enjoy a fast growth rate of about 2 feet (0.6 meters) per year. Too much of a good thing can prove pretty bad for plant growth. Gardeners need to consider the following items carefully: The best time to plant rhododendrons is in the autumn when their roots have time to acclimate and get ready for spring. My name is Lisa, and I’m on a mission to expand my plant knowledge. Unfortunately, there is no single answer to this question. Most home gardeners purchase rhododendron plants in full bloom online or from a garden store. This website uses cookies to improve your experience while you navigate through the website. Rhododendrons are not the kind of plant that is good at sharing space with other plants, so you want to make sure that they have their own space. The Brittenhill Bugle rhododendron has red, funnel-shaped flowers with wavy edges. You’ll also want to know which variety of rhododendron you’re dealing with. In addition, you’ll want to make sure that the soil is deep enough to cover your rhododendrons’ root systems, which are typically on the shallow side. Most of these plants grow best at a soil pH between 4.5 and 6.0. The growth rate of rhododendrons varies greatly depending on the type. For example, some varieties grow at an annual rate of less than an inch, while others grow as fast as two feet per year. While you don’t want to drown these plants, providing them with enough moisture is essential for making sure that they not only grow faster, but that they grow at all. Many rhododendron plants grow from 3 to 4 feet in 10 years, but some can grow up to 7 feet in 10 years. Most rhododendrons grow best in reasonably mild, humid climates. Then, firm the soil around the plant and soak it thoroughly with water. Not only will this help them grow even faster, but it can likewise keep them from encroaching on another plant’s soil and roots. from a cutting is possible. These plants will grow as wide as they do tall, which makes them look like a cross between a tree and a shrub. Save my name, email, and website in this browser for the next time I comment. That being said, you also don’t want these delicate buds and leaves to be exposed to dry, hot conditions, so make sure that there is at least some shade nearby that can be employed to protect them on days where the sun is too searing for them. Happy planting! We also use third-party cookies that help us analyze and understand how you use this website. These evergreen shrubs bloom beginning in spring, and their trumpet-shaped flowers range from pale pink to pale lavender. Additionally, their blossoms are freckled with dark red or purple spots. Your email address will not be published. This website always gives quality article. Not only will this not help your plant, but it will likely stifle its growth. And until we meet again, the best of luck with that green thumb! That’s true of mulch volcanoes, and it’s true of pruning as well. Failure to do this can result in your plant drying out prematurely. The Practical Planter also participates in programs from ShareASale and other sites and is compensated for referring traffic and business to these companies. It is mandatory to procure user consent prior to running these cookies on your website. I wasn’t sure about the pH and mulch. Whether you imagine them as symbols of romance, metaphors for an encroaching all-consuming presence, or simply a beautiful and intriguing flowering plant, rhododendrons can be an exciting addition to any garden, as long as you plan ahead and accommodate them properly. Rhododendrons range in size from dwarf shrubs to medium-sized trees. Other varieties of rhododendrons grow at an annual rate of about 0.5 inches (1 centimeter). For example, some varieties grow at an annual rate of less than an inch, while others grow as fast as two feet per year. Instead, they thrive in wetter climates such as the Northeastern United States, Great Britain, and other areas where rainfall is abundant. This article has helped me to solve my confusion. Press Esc to cancel. Eight flowers form its sphere-shaped flowers, and the blossoms start white and gently fade to pale pink. : These shrubs require partial shade, medium moisture, and well-draining soil. A mixture of 50 percent pine bark, 25 percent topsoil, and 25 percent compost works best. : These shrubs require full sun to partial shade, medium moisture, and soil that is moist and well-draining. The fact of the matter is that this category is the broadest, including trees that grow as high as 80 feet in total! These plants will grow as wide as they do tall, which makes them look like a cross between a tree and a shrub. Additionally, they should never be used to provide a block against harsh winds as such conditions can cause serious damage to the plants. I am from Nepal. Now that you know the answer for the question how fast do Rhododendrons grow? As mentioned, you want to make sure that you plant your rhododendrons in the best possible manner so as to ensure that they remain in good shape when you expose them to the elements. You want to prune your rhododendron pretty sparingly, only doing so a little bit every year, excluding emergency pruning to avoid rot or other plant illnesses. Other varieties of rhododendrons grow at an annual rate of about 0.5 inches (1 centimeter). And, they provide an excellent backdrop when they are blooming. Either way, rhododendrons do best when planted in locations that offer both exposure to sunlight as well as plenty of shade. They grow best in climates that are mild yet enjoy a fair amount of rainfall in summer, so one prerequisite for getting them to grow quickly is to avoid dry planting conditions. For example, buildings, fences, and slopes serve as suitable barriers. The fastest-growing rhododendron cultivars grow 7 feet in 10 years, according to the American Rhododendron … Best of all, growing a spectacular garden filled with rhododendrons is simple and doesn’t cost a lot of money. That said, one common mistake is to simply lump on massive amounts of mulch. These categories are as follows: Otherwise known as miniature Rhododendrons, these variations rarely grow above 12 inches in height. Whatever your rhododendron growing desires may be, this guide can help you achieve them and grow a full bloom of rhododendrons worth remembering. You thus want to make sure you find the right type of rhododendron for keeping with your growth expectations. Soils previously limed for a lawn or garden may need to have the pH lowered. The rest of this article will discuss the possible range of growth rates of rhododendrons, their size, and types, and how to grow them. Additionally, blossoming occurs much slower in plants grown from seeds than from cuttings. Your email address will not be published. For that reason, a site that slopes to the north or east is usually best because it protects them from drying winds from the south and west.