Not really getting brown, just curling up and looking like popcorn. Curling could be due to over watering (in lower temps the plants likely won’t need as much water). Scorched leaves are more evident on the sides of the trees most exposed to prevailing winds and strong sunlight. The Crimson King maple is a cultivated variety of the Norway maple tree. Curling can also be caused by too much light, as the leaves will try to protect the plant by curling up. It is a tall tree and offers a large amount of shade. For the last two years the tree’s leaves have started curling and burning up in early June. i had a Japanese maple tree that was in a bad area, other trees were around it and it hindered its growth. But transplant shock can look much different for your tree. Needless to say, the poor thing is toast - and I feel especially bad about it because the tree was a gift. I have a Japanese maple that we planted two years ago and never had a problem. Leaves Dropping After Transplant and Other Signs of Shock. What is odd as that only certain branches are doing this. This year, we noted some of the leaves were curling up and drying out. Entire leaves may curl and wither when leaf scorch is severe. Maple roots, especially the valuable little ones, are sensitive to being over-watered and can die from it. Following that initial drowning the tree will have a reduced root mass to send up water, oxygen, and nutrients to the leaves. The rest of the tree bloomed out normally, but within a month the leaves … This could explain the indoor plants curling – try moving the light further away. There are certain bugs and pests which are known to cause the curling of cannabis leaves. I recently uprooted it and out it in a nice open area. I have been watering regularly. Just planted some small maple trees and the leaves are curling up.When trees are initially planted is it normal for the leaves to shrivel up Due to the root, plant structural, and photosynthesis issues which many pests can cause, depending in the pest and severity of the infestation, it can cause curled up leaves. It happened to a laceleaf Japanese maple I planted a few years ago, it leafed out then the leaves started curling and drying, falling off, and whole branches dying. Debbie’s maple trees are dropping leaves as a sign of shock. Other signs of a tree in shock include: Leaf scorch; Brown leaf tips; Premature fall color; Stunted twig or flower growth; Late spring budding; Branch dieback Its characteristics are flat, circular seeds, large pointed leaves and sap-filled shoots and leaves. For 20 years we’ve had a Japanese maple in perfect health. Not one single leaf has grown over the past 5 months. The other cause of curling leaves could be bugs and pests. 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