Not really getting brown, just curling up and looking like popcorn. i had a Japanese maple tree that was in a bad area, other trees were around it and it hindered its growth. There are certain bugs and pests which are known to cause the curling of cannabis leaves. Its characteristics are flat, circular seeds, large pointed leaves and sap-filled shoots and leaves. The rest of the tree bloomed out normally, but within a month the leaves … Debbie’s maple trees are dropping leaves as a sign of shock. What does it mean when you find your plant's leaves are curling? For the last two years the tree’s leaves have started curling and burning up in early June. Maple roots, especially the valuable little ones, are sensitive to being over-watered and can die from it. Leaves on the same branch often show similar symptoms but an entire tree may not be uniformly affected. Entire leaves may curl and wither when leaf scorch is severe. What is odd as that only certain branches are doing this. It is a tall tree and offers a large amount of shade. This could explain the indoor plants curling – try moving the light further away. 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 Following that initial drowning the tree will have a reduced root mass to send up water, oxygen, and nutrients to the leaves. Not one single leaf has grown over the past 5 months. This Spring considerable dead branches had to be cut back. The other cause of curling leaves could be bugs and pests. For 20 years we’ve had a Japanese maple in perfect health. I have been watering regularly. Curling can also be caused by too much light, as the leaves will try to protect the plant by curling up. Since then, it has slowly but steadily lost all its leaves by curling, drying up and falling off. Leaves Dropping After Transplant and Other Signs of Shock. 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. 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 The Crimson King maple is a cultivated variety of the Norway maple tree. I have a Japanese maple that we planted two years ago and never had a problem. Curling could be due to over watering (in lower temps the plants likely won’t need as much water). I recently uprooted it and out it in a nice open area. But transplant shock can look much different for your tree. 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. Needless to say, the poor thing is toast - and I feel especially bad about it because the tree was a gift. 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