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In the fall I bought a few trees from Arbor Day. I planted the birch and plane tree on the north side of my house and they haven't budded, bloomed, or leafed yet while my other trees have. I did the scratch test and they're still green under the bark although the plane tree's top did die back. I'm in Chicago zone 5b/6, we had a very mild winter so I don't know want the problem is

  • A picture of the tree would be very helpful to add to your question – JStorage May 5 '16 at 19:14
  • What are the temperatures there? It should take a week or two to show any real growth if you've had a hard frost. – black thumb May 6 '16 at 5:50
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  • Option A; they are dead (don't go too hasty on this option, it might be wrong)
  • Option B; they know, or think they know, something about your "mild winter" that you don't, and are biding their time, hoping to miss a late frost/freeze.
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