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Your Tree Questions Answered!

April 13, 2012
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You know it's spring when the sun is shining, the birds are singing, the flowers begin blooming … and questions for The Tree Doctor start rolling in.

Here are a few of the recent questions we've been asked. We hope the answers to these common questions help you get your trees off to a great start this season.

QUESTION: I planted a potted apple tree that had flowers. A week ago the flowers dropped off and the leaves became really soft. What could be the problem?

ANSWER: This is normal. Flowers typically only last a couple of weeks. Leaves are soft after bud break and harden as the season progresses.

QUESTION: I have a huge tree on my land. But I do not know what kind it is. How can I identify it?

ANSWER: We recommend you look at the tree closely, from leaf shape to bark texture and compare these specifics to a tree identification guide on the Internet to help you identify the tree. One good one is called "What Tree is That?" from the Arbor Day Foundation.

QUESTION: What are fertilizer application rates for feeding fig, pear, plum and other trees?

ANSWER: Apply 2.25 pounds of nitrogen per 1,000 square feet per year with a slow-release, low-burn fertilizer.

QUESTION: I want to plant a Japanese maple. I live in Oklahoma and have a pecan tree that is huge - probably 25 years old. The Japanese maple would be in its shade but subject to the hot, dry winds of Oklahoma. Do you think it would survive? It is very small right now.

ANSWER: A Japanese maple should survive in the shade of a pecan in Oklahoma City, Okla. Deeply water the Japanese maple once weekly during the growing season to prevent drought stress and again just prior to winter around Thanksgiving.

QUESTION: What's the best mulch for your trees and does it depend on whether it's a fruit tree or not?

ANSWER: Crushed coconut shells are actually the best mulch for all types of trees because they retain their color, decay slowly and are crushed into small pieces for a fine texture. Walnut shells and cocoa bean shells are also good for these same reasons. Unfortunately, these aren't always as readily available.

Hardwood mulch, on the other hand, which is more readily available and is inexpensive, loses its color and decays very quickly.

QUESTION: I have two oak trees that I planted on the same day in 2001. One has prospered, has grown to great heights, turns green every year and has produced acorns the past two years. The other has not grown half as much, and the leaves turn yellow and pale green. The northwest side of tree has limbs that won't sprout any leaves at all. I need help knowing how to heal my tree. I love my trees.

ANSWER: This reminds us of the parable of wheat where some was planted in good soil and some was planted in rocky soil. One crop prospered and one didn't.

We think this is probably a result of iron chlorosis due to soil problems. Try adding chelated iron supplements to the soil if the trees are small or through trunk injection once the tree is larger.

QUESTION: The leaves of my white birch came in on the front of the tree, but not in the back part. The branches still seem to be alive in the back.

ANSWER: Have patience for the trees to leaf out. Multi stem birches frequently act as different trees.

Don't forget. If you have a pressing tree care question, you're not alone. You can always ask The Tree Doctor for help.

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