At that junction, trunk bark cells change into root system cells. The location on the trunk base where roots begin to emerge is called the root flare or root collar. What happens when trees and shrubs are planted too deeply and the root flare (photo below) is not visible or is mulched too deeply? The use of too much mulch can then exacerbate the problem, especially if it buries the trunk. Even trees planted by professional landscapers can be planted too deeply leading to poor establishment and growth. This leads to future problems, including possible decline and death, especially when they are planted too deeply in the landscape. In many cases, trees and shrubs are sold with their roots and trunk already covered with too much soil. Rootball problems with B&B and container-grown plants Invasive Plants to Avoid Buying for your Yard and Garden in Maryland. Learn more about invasive plants in Maryland. The state of Maryland and many government offices and non-profits such as Casey Trees of Washington DC offer rebates to support native tree planting. Support wildlife and your local ecosystem by planting a Maryland native tree.Learn more about how to test soil drainage before planting. There are exceptions, like river birch ( Betula nigra), baldcypress ( Taxodium distichum), sycamore ( Platanus occidentalis), and many others. Most trees need well-drained soil and are susceptible to root rot on wet sites.Do your research before going to the plant nursery. Also, the site should be large enough to accommodate the plant when it’s full-grown. Begin by choosing the appropriate tree or shrub for the amount of sunlight the site will receive.Most balled-and-burlapped (B&B) and container-grown trees can be planted any time the soil isn’t frozen.While broadleaf evergreens are best planted in the spring, some like mountain laurel, boxwood, and hollies can be transplanted in the early fall if they are watered deeply and regularly (if needed) and mulched.Some trees have fleshy roots and should be planted or transplanted in spring: dogwoods, magnolias, willow oaks, tulip poplar, and yellowwood.Summer planting, when plants are in full leaf, can be stressful and should be avoided if possible. Fall, winter (soil should not be frozen), and early spring are the best times to plant trees and shrubs.Contact Miss Utility (811) before planting or visit Miss Utility Maryland. Locate all underground utilities before digging.Resist the desire for an “instant landscape.” Smaller, younger plants become established and begin to grow faster than their larger counterparts. ![]() ![]() If available, choose disease and pest-resistant cultivars of trees and shrubs.Refer to Tips for Choosing Trees and Shrubs. Check the soil pH and nutrient levels by testing the soil before planting. ![]() About planting trees or shrubs in the home landscape
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