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Keyword Search Results for:
Colorado Blue Spruce

2 Found

Question: 149-5201
We have 50 Colorado Blue Spruce in a row. Some of them are turning brown at the bottom. They are eight feet tall and eight feet apart. What could be causing this? Marilyn, Montville, CT

Mort's Answer:
Your trees are planted too close. Picea pungens grows to 140 feet in the woods. I would suggest that you remove every other one. Perhaps, a nursery will purchase them, if you do not have the room. You could sell them to a Christmas tree business. You could also trim off the bottom branches and allow for walking room underneath. There is a remote possibility of red spider mite infestation but you would still need to make space for them to grow. You can test for spider mites. Shake a brown branch onto a white piece of paper. Fold the paper and then rub the sides together. If any red spots appear, you have a positive test. Spray with Kelthane or another miticide according to directions. You can also check for grubs by digging at the leave drop. Those little shrimp like creatures are now burrowing into the ground to about six inches deep. If you find them, use a grubicide.

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Question: 1036-4313
I want to plant some 20 Colorado Blue Spruce under the power line to my house. It is about 25 feet high. I was told to cut the leader to keep them from passing the line. Any suggestions? Dave, Imlay, MI

Mort's Answer:
Cutting the leader will only give you two ways to grow 100 feet tall. I would recommend Siberian arborvitae. They are very hardy and can be kept at 15 feet without trouble. They should be planted eight feet apart for a hedge. There are other Thuja occidentalis that can be found like T. occidentals techny and T. occidentals nigra. These American arborvitae grow wider than the pyramidal.

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