Knowledgebase

Brown needles on my blue spruce #718517

Asked August 28, 2020, 11:47 AM EDT

I would like some help with determining why three blue spruce are getting brown needles

Jefferson County Colorado

Expert Response

Hello, and thanks for contacting us. This heat has been very hard on plants. A few questions and additional pictures will help us to diagnose the problem:
  • How old and how tall are the trees?
  • How do you water the trees, how often and for how long?
  • Has there been any construction or digging in your yard (or a near neighbor's) within 50 ft or so of the trees?
  • Have any chemicals (fertilizer, herbicides, insecticides) been used in your yard (or a near neighbor's) yard this year?
  • Do you see any evidence of insects - webbing, swelling, holes, etc. on the trees?
Photos - Please send:
  • a wide view picture showing all three trees in their entirety, including the ground below them.
  • an individual picture of each tree in entirety
  • a picture of the lower inside of the tree. Maybe have someone hold open some lower branches so you can get a good picture.
  • a close up of a branch, if possible, showing a partly affected branch from trunk to tip.  We want to see where the damage appears on the branch - if it's all the way to the tip, or only at the trunk end or the tip end
  • a close up of a couple of different tip ends - if possible snip off 3-4" in a couple of spots that are representative of the damage.  Laying them on a piece of paper might help get a good shot.  We want to see if the needles are affected from the outside in or inside out.

The trees are 6' tall and were planted last year in the fall
Water Twice a week at the base 5 min or so
No construction with in 50'
Richlawn fertilizer on my grass not sure about the neighbors
I dont see any insects but i went to Otooles Nursery with the photos and they said spray with SEVEN i did that about a week ago
I will send new photos this weekend


The Question Asker Replied August 28, 2020, 1:37 PM EDT
Thanks for the quick response.

On the watering, new trees like this need long, deep watering when it's hot like it has been. It looks like you have them well-mulched, which is great. A good way to water trees is with a soaker hose, or it can be done by hand. For starters give them a good watering ASAP - 10-15 minutes each on top of the area comprising the holes they were planted in. Unless we get regular rain, you'll need to water all fall unless we get regular rain, and through the winter (though not as frequent) depending on snowfall.

I'll provide more instructions after receiving the new photos and reviewing to make sure there isn't something else going on.  On first look it does seem like they are drought-stressed.  Hopefully the trees can be saved - I will research further and help you with a plan of action.




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