But for most trees and shrubs, late winter or early spring is the best time for transplanting. Rhododendron Transplant Time. Fall is the second best time. Rhododendrons are actually the most popular woody landscape plant in the United States. We'll show you how to plant, grow, and care for them. Rhododendrons and azaleas have shallow, pancake-like roots that transplant easily, allowing themselves to be pried up. The shock of transplant is often too much for plants to recover from, according to North Dakota State University Extension. But if your rhododendron has … Rhododendrons are acid loving plants. There are over 800 species of rhododendrons ranging from spreading groundcovers a few inches high to 100 foot tall trees and many thousands of registered, named varieties. I have a rhododendron that is being crowded out by a pine tree I have next to it, so I'd like to transplant it to a better spot. Typically, plants removed from landscapes or native areas retain only 25 percent of their root structure. Generally large-leaf rhododendrons are less tolerant of sun and wind than small-leaf rhododendrons or evergreen and deciduous azaleas. The shrub is still dormant or just breaking dormancy at this time. Comments (1) Add Comment View Comments. The best time to transplant is either late winter just before spring growth begins, or a couple of months before the ground freezes in early fall. If you're looking to learn how to plant rhododendrons, you've come to the right place! Fertilizing rhododendron bushes isn’t necessary if the shrubs are planted in fertile soil. Slide the plant onto a tarp to assist in moving it. Transplanting established evergreen trees and shrubs is risky, at best. There is much discussion of rhododendrons being “acid loving” and of the need to keep the pH of the growing medium between 4.5-5.5. In fact, the American Rhododendron Society recommends trimming the bush to control its size, if you want to pick the flowers for an arrangement or to remove spent blooms through the season. I live in the northeast and want to know when is the best time for me to transplant it. The Best Time to Uproot & Transfer a Bush. Moving is difficult for people and plants alike. As such they perform best when the soil is acidic (with a pH between 4.5 and 6.0). What's great about these flowers is that sometimes even during the cold, winter months, their leaves will stay green! Plant as soon as possible after frost has left the ground to give the shrub the maximum amount of time to grow new roots before the spring growth frenzy takes hold and the shrub starts work on growing its above-ground parts also. Twenty-four species of rhododendron are native to North America. Anonymous added on June 6, 2011 | Answered. Anonymous October 16, 2018 Three years ago I decided to move my boxwood of … Proper soil conditions are very important. The mixture varies with some using only composted pine bark. Late winter to early spring is the next best time for transplanting. These include magnolias, tulip poplars, oaks, birches, rhododendrons, hemlocks, and flowering dogwoods. In general, rhododendrons require little pruning. However, trees and shrubs with thick, fleshy roots often don't react well to transplanting in the fall. Most commercial growers today propagate rhododendrons in containers with a soil mix of 2 parts composted pine bark, 1 part peat moss, and 1 part sand. Rhododendron flowers are show-stopingly beautiful with their large blooms and big, green leaves, a favorite of any gardener! Some are wild. A transplant might help a struggling rhododendron, but early spring is a better time to do the deed than late fall. (See Soil Conditions for more information.) 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