Hornbeam Trees
Q.

care for frostbitten hornbeam trees

Zone denver colorado front range. | bkemman added on July 22, 2015 | Answered

My 12 year old hornbeams have now been bitten twice by the frost, each time losing some stems - once 7 years ago, and more recently this past Mother's Day. Several small stems have been lost, but more disconcerting is that the leaves mostly have a yellowish tinge, without the beautiful green that we're used to. What should I be doing to save the trees?

A.
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Downtoearthdigs
Certified GKH Gardening Expert
Answered on July 23, 2015

Yellowing leaves indicate a stressed tree, usually a watering issue.
To much or to little. If it has been dry I would compensate and water the tree to help it through the warmest part of the summer.
Also mulching can help. 2 to 3 inches of a hardwood mulch will help retain moisture.
Watch for signs of insect or fungus in the stressed tree.
You could apply a light fertilizer now, but nothing to high in Nitrogen. Look for a balanced formula. 10-10-10.
Then in late fall or early spring reapply again.

https://www.gardeningknowhow.com/ornamental/trees/hornbeam/hornbeam-care-and-growing.htm

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