Why Is My Redwood Tree Dying?

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Redwoods (Sequoiadendron giganteum) are giant trees that grow naturally throughout the coast of California and Pacific Northwest. Growing redwoods outside of their native area is possible takes extra effort. Plant redwood saplings in pots and keep them inside a greenhouse or put in the ground. Both methods involve some risk to the tree. Some of the reasons why the redwood tree is dying include wrong amount of moisture, temperature fluctuations and disease.

Temperature

  • The redwood's native habitat is warm and humid. Redwoods grow best in temperatures from 20 to 90 degrees. A tree in temperatures that are too low or too high dies. They are also more susceptible to disease. Redwoods grow in lower temperatures, but care must be made to ensure the tree does not freeze. Cover the tree in cold weather or move a potted tree indoors, if possible. The tree may be dying because it is too cold or too warm.

Moisture

  • The summers are dry in the Redwood's native land. That does not mean that Redwoods can survive without much water. High humidity and fog in their native habitat creates moisture for the leaves of the tree. Redwoods grown in other areas need additional water through irrigation or lawn watering systems. A sign of a dry Redwood is wilted leaves. It should perk up after watering. Overwatering also kills a redwood tree and brings about disease. Saplings do not survive in that is either too wet or too dry.

Grey Mold

  • According to The Bugwood Network, redwood trees are highly susceptible to gray mold. It is especially dangerous to redwood saplings planted in containers, grown in fiberglass greenhouses or with low air circulation. Grey mold looks like gray, cottony fibers on the leaves or limbs of the tree. Fungicides prevent grey mold. Infected trees are generally cut down to prevent spreading the disease to other trees. There is no cure for gray mold.

Root Rot

  • Root rot affects redwoods in containers and can quickly spread through the tree from the roots. Drooping and yellowing leaves are signs of root rot. The roots look brown and soft, whereas healthy roots are hard and lighter in color. If caught early, root rot can be contained and the tree can be saved. The tree needs to be moved to a new container with fresh sandy soil. Remove any of the diseased roots. If the tree is too diseased, it may not survive.

References

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