No pruning is required for Blue Star Juniper. Water a newly planted "Blue Star" juniper regularly during the growing season to promote deep, healthy roots. Large juniper bushes are best cut with an electric pruner. Water a newly planted "Blue Star" juniper regularly during the growing season to promote deep, healthy roots. The blue star juniper does well in a variety of soil types, so long as they are well-drained, but its natural preference is for light, sandy soil. The first time in the spring before the start of growth. You can also remove any branches that are overlapping or sticking out too far. Maintenance Pruning. How to trim a large juniper bush? It is better to prune this ground cover three times a year. Water an established juniper only if the plant looks dry. Juniper is a drought-tolerant plant that will be damaged or suffer from rot in overly wet soil. Their slow growth rate means that Blue Star juniper shrubs hardly ever have to be pruned unless you are trying to fit them into an area with very little room. One good place to start is the removal of any dead or leafless branches – these can be cut off at the trunk. Don't water during the winter unless the weather is extremely dry. Remove old, dead growth on the underside of the plant as needed to improve air circulation. © Copyright 2020 Hearst Communications, Inc. It does well in slightly alkaline soil. Different Ways to Trim a Blue Star Juniper "Blue Star" Growth. How to Keep Your Miniature Bougainvillea Alive, How to Care for a Purple Queen Bougainvillea, University of Georgia College of Agricultural and Environmental Sciences: Junipers, University of Minnesota Sustainable Urban Landscape Information Series: Evergreen Trees and Shrubs. Prune junipers annually to correct their shape. She writes about a variety of topics, with a focus on sustainable, pesticide- and herbicide-free gardening. Spray "Blue Star" juniper with insecticidal soap spray if the plant is bothered by pests such as aphids, scale, spider mites or leaf miners. Second time in summer and last time in autumn. The best time to prune your junipers is in the winter or early spring. While overgrown juniper pruning has its limits, it is possible to trim your plant down to a more manageable shape. 3. Soak the soil to a depth of 6 to 8 inches to saturate the root zone, and then don't water again until the top 1 inch of soil feels dry. After a rainy and wet Spring, you might see some dieback at the stem tips, which can be snipped off with no harm to the plant. The plant is deer-resistant and adapts well to coastal environments. "Blue Star" juniper is a hardy plant suitable for growing in U.S. Department of Agriculture plant hardiness zones 4 through 8. Spray the plant thoroughly and repeat every four to seven days, as the spray kills only on contact and has no residual effect. M.H. First, give it … Water an established juniper only if the plant looks dry. Dyer began her writing career as a staff writer at a community newspaper and is now a full-time commercial writer. She is an Oregon State University Master Gardener and Master Naturalist and holds a Master of Fine Arts in creative nonfiction writing. How to Care for Blue Star Juniper 1. Otherwise, never prune juniper heavily, as old wood doesn't produce new growth. "Blue Star" juniper is a slow-growing, spreading plant that reaches heights of 2 to 3 feet, with a spread of 3 to 4 feet. Apply the fertilizer at a rate of 1/2 pound for every 100 square feet of planting space. It is extremely slow growing, so should behave nicely where it is planted. However, the plant rarely requires irrigation. Like all junipers, "Blue Star" juniper (Juniperus squamata "Blue Star") is a sun-loving, drought-tolerant plant that thrives with little maintenance. When should I prune my Blue Rug Juniper? However, the plant rarely requires irrigation. The dramatic, silvery blue foliage adds interest to rock gardens, borders and mass plantings. Feed juniper in early spring, using a dry fertilizer with an NPK ratio of 12-4-8. 2. Use a commercial spray, as homemade sprays made with liquid dish detergent are often too harsh and may damage the plant. In the springtime, it’s easier to see the general shape of the tree and cut the branches without having to worry about accidentally harming new growth. Limit pruning to the tips of the plant or thin lightly to keep the plant neat.