This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply. A Different, Simple Landscape Design Idea. Occasionally, Japanese maples are troubled by aphids, scale or powdery mildew, but these are easily treated and seldom kill the tree. Date: September 04, 2014 06:27PM ... Three of my Japanese maple trees are 20+ years old. The leaves of plants can appear drought stressed, so sometimes home gardeners will respond to these symptoms by adding more water instead of allowing the plant to dry a little between watering. Q: My well-established Japanese maples are dying. If you dig a hole bigger than the root ball in clay soil, then back fill around that root ball with some kind of loose, porous material all you are doing is allowing excessive water to enter your planting hole with no way for that water to escape. During drought, I tried to water twice a week, then leaves turned brown and fell off. Why is one side of my Japanese maple, or just one large branch completely dead? Send questions to Garden Detective, P.O. Do not pile mulch up around the stem of the tree. For more information on Verticillium wilt, go to ipm.ucanr.edu/PMG/GARDEN/PLANTS/DISEASES/vertwilt.html. Send email to h&g@sacbee.com. Verticillium wilt affects the vascular system of a plant – the network of tissue that transports nutrients, food and water among plant parts. The plants in your landscape do not need fertilizer. If there is, you can leave the branches in place and see if new shoots or leaves form. For more information on Phytophthora, see the UC IPM Pest Note 74133, “Phytophthora Root and Crown Rot in the Garden,” at ipm.ucanr.edu/PMG/PESTNOTES/pn74133.html. Whether your tree is balled in burlap or in a container there is a root crown right at the soil level. We have had this tree for about 20 years and have never had this problem before. We have another red Japanese maple about 50 feet away that seems to be doing fine. Yes, the dead lower branches should be removed. Stake the tree for at least a year so the roots can get established without the wind rocking the tree back and forth constantly. Free Plans to Build Your Own Simple Homemade Plant Propagation System. Like all plants, Japanese maples will fail quickly if you plant them too deep. The most effective way of preventing these diseases is to provide adequate drainage and practice good water management. Box 15779, Sacramento, CA 95852. In addition, your shears should be sanitized after pruning by dipping them in a 10 percent bleach solution to make sure the disease is not transferred to another plant. Is it possible to save this tree? Pink Diamond Hydrangea, Growing, Selling and Propagating this Amazing Plant. They seem very dry and brittle. They just don’t need it and too much can and will kill them. Experts tackle readers’ garden questions. When planted that root crown should actually be about 1.5 inches above grade if not higher. Rachel Tooker is a UC Cooperative Extension master gardener for Sacramento County. The disease can cause foliage to turn faded green, yellow or brown and wilt in scattered portions of the canopy or on scattered branches. It will rot the bark and kill the tree. This issue has been reported in several areas of Maryland, which … After reading #7 you now know that I am bona fide crazy and full of you know what. I hoping trees come back this Spring, but so far nothing. All the new growth and leaf buds are on the upper branches. Black or reddish sap may ooze from darkened areas of infected bark. Questions are answered by master gardeners at the UC Cooperative Extension services in Sacramento and Placer counties. Not a million gallons of water! Here’s a little known fact that most people don’t understand. Japanese maples may look delicate, with their lacy, red leaves and twisting branches, but they're actually pretty resilient. But here are some thoughts: Find things to do, from music to movies to arts and theater. I’ll do the ‘scratch’ test, tho. Water your Japanese maple as needed. ipm.ucanr.edu/PMG/GARDEN/PLANTS/DISEASES/vertwilt.html, Placer County health officials link COVID-19 outbreak to Rocklin basketball center, Man’s vehicle hit by gunfire as he drove to work on Interstate 5 in Sacramento, CHP says, This coach last saw his mother in Woodland in 1979; his DNA helped find her body, The latest check on Gavin Newsom’s political ambitions? It is planted on the southwest side of the house. These ornamental maples are prized for their foliage, diminutive size and value as a focal point for garden plantings. Too much shade and they will turn green and lose their beautiful colors. Never soggy, simply cool and moist to the touch. 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