I left town for a few weeks and came back last week to leaves turning brown. Keep the soil moist … is a large evergreen shrub or tree with scale-like green foliage arranged on its branches in flattened sprays. Hi there, thanks for the help. We recently moved to Lafayette and planted five 6 foot Arborvitaes back in early June. Why Do I Have Brown Leaves on My Magnolia Trees? Once established, the plant will do fine during normal dry periods. thuja occidentalis Arborvitaes are among the most popular trees to plant because of their numerous benefits, including their fast growth, tall heights, and year-round green foliage. However, if a sudden cold spell hits the tree before it is done adjusting, the weather can freeze the plant tissues and make your tree sickly or … The hot, dry conditions combined with the stress of transplanting requires extra care to ensure the health of the plant. The roots of the arborvitae have been limited to a container and will require time to develop new feeder roots to be able to draw moisture from deep within the soil. I live in upstate NY and have been watering these consistently and keeping the soil moist so the roots would take. ... Why is My Thuja Green Giant Turning Brown? Arborvitae (Thuja) is notorious for a fall 'needle' cast. Spider Mites – These pests can cause arborvitae leaves to gray or brown. In my experience, arborvitae can go from green to brown in just a few days if they are not carefully watered when establishing. When you are purchasing your arborvitae, research the climate zones where it will flourish. Source(s): https://shrink.im/a0eOG. But leaves turning brown at the outer tips of branches can be a serious problem. The oldest needles are those that are closest to the trunk along a branch. My sprinkler guy says his are doing the same thing. 4. When it is starved of irrigation or rainfall, browning is a likely consequence. This versatile plant is usually dependable and easy-to-grow, so if a newly planted specimen has foliage or branches that begin .… Question. You need to follow the basic rule of two-feet centers. An American arborvitae tree is full and cone shaped. Arborvitae can also be susceptible to other common pests and diseases. If the whole tree is browning, think about water — too much or too little. The oldest foliage (towards the center of the shrub) turns gold then brown. Cryptomeria will reach heights of 50 feet with a 25-foot spread at maturity. Arborvitae Tree Care, Pruning Tips, Signs of Diseases or Other Problems. Pine trees are doing this now. Anonymous. Why is my arborvitae turning brown? Zone 12211 | shugarhi added on May 13, 2016 | Answered. The oldest branchlets turn brown in autumn and fall off. I had a privacy row of arborvitae and they did fine for about ten years until I started skipping mulching underneath them -- the bigger they got on the bottom, the harder it was for me to get at, so I let it go (they were in a bed with a rock surround), and that's when I started to have problems. I want to make sure they're ok. Use a soaker hose to deliver deep watering. Branchlets rather than scale leaves are shed in autumn as a normal part of the plant development. 0 0. Arborvitae also prefers moist air, so when the roots are stressed for water and the ambient humidity is low, the odds of the foliage turning brown are increased. Fertilizing Arborvitae. For the next 3.5 months, they stayed green and looked healthy. An arborvitae is an evergreen tree or shrub belonging to the Cypress family. to shed their oldest (innermost) needles in fall. I am glad to get the question, much better than the “My tree is brown….” All evergreen trees, including pine, spruce, arborvitae, laurel, and boxwood, drop 1 year worth of needles or leaves every year. This usually happens in late summer or early fall, during the same … However, browning leaves on the outside and inside of the shrub can indicate the plant is dying from a lack of water. The innermost needles gradually turn yellow or brown and drop to the ground. Is this normal? Hi puck, this isn't an expert's opinion, but the voice of experience garnered in north Jersey. Depending upon the variety, they can put on two to three feet of vertical growth annually. The browning of the inner foliage is probably due to seasonal needle drop. It’s normal for evergreens (pine, spruce, fir, juniper, arborvitae, etc.) The most common sign that your evergreen tree is stressed and potentially dying is the browning of a section or the entirety of the tree. Arborvitae turning brown. They are tiny and have eight legs. A dense, narrow, evergreen shrub or small tree, arborvitae makes a wonderful privacy screen and windbreak. Sometimes it is so bad that it looks as though most of the plant is dieing. These remain on the shrub for many months. If you see such brown leaves in the summer, it could be due to any of the following, or some combination thereof: Aphids: Inspect foliage closely for masses of these tiny, soft-bodied insects that can be orange, green, black, or brown. Spacing Improperly. Thujas will turn brown due to a couple of reasons, most due to the environment in which they are living. Although arborvitae, when grown next to each other, make a good hedge or fence, make sure they are properly spaced apart. Usually, the damage they cause is more of turning foliage brown (like it is covered with dust). 1 decade ago. The shape of an arborvitae tree varies depending on cultivar. Green Giant Arborvitae Care. Arborvitae is an evergreen plant. 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