PROBLEM WITH KOREAN HORNBEAM LEAVES

Hi

Am having a bit of a problem with my korean hornbeam the leaves have turnedfrom green to a rusty brown colour and the tree looks very sick.
the only fertilizer have used is called the ONE on it.
Can anyone on here help me on this matter

Where do you keep the plant?

Your soil looks like it stays fairly wet.

How long since it was last repotted?

But don't worry. That doesn't look to me like like anything fatal.

Did you apply fertilizer sprayed on the leaves?

That in combination with strong sun can cause this on a few leaves.

the plant is kept in a corner of the garden and gets the sun around 3pm till dusk.
the soil is wet most of the time
about a year ago for since it was repotted

yes the first time the fertilizer was used sprayed on the leaves and thought it could be burnt by the sun

i have start to leaf prune just to take away the dried leaves off the tree

thanks for help on this

Hello Mark. Are you sure its Korean? Looks like Carpinus betulus, European Hornbeam. The leaves burn like this if the plant is too dry. Hard water can also be an issue.

Looks like leaf scorch to me. Paradoxical, since actually you are not giving it what I would consider enough sun. It just may have had too much sun at some point.
I have a Korean hornbeam forest planting. In the spring I try to get it outside as early as possible so the leaves are exposed to some sun while opening. At first it is in more shade, but by now it is getting quite a bit of sun most of the day. It is in a quick draining bonsai soil & gets watered every day. I apply Pro-TeKt potassium silicate once a month, which seems to help.
Iris

Overall, it seems healthy enough.

I don't think it is any kind of chemical burn; that shows up differently.

I'd merely remove the damaged leaves. Do yopu defoliate this tree? I often defoliate these and others when leaf issues show up on an otherwise healthy plant.

As Will says, IMO definitely not a KH. On the more common Hornbeam I tend to get this most years. I've experimented with sun exposure and overhead watering, keeping it dry, moist but never wet; nothing seems to male a great deal of difference.

Why do you all say it is not a Korean hornbeam? I have had a Carpinus coreana for 25 years, and its leaves are identical -- mine are 3 cm long by 1.5 cm wide. I can't tell how large those pictured here are, but that tree probably hasn't been in a pot as long as mine.

The leaves look about 2/3 times the size, far more ribs and much darker bark than you get with Korean Hornbeam.

i'm in the camp of native hornbeam rather than korean - leaf size, depth of ribs and this summer scorch all point at a native.

usually it comes from drying out on a hot or windy day, but a soil too wet will lead to roots that aren't very healthy, then the tree doesnt take up moisture properly and it scorches even though the soil is wet.

the tree will survive though, and next year play about with a different potting soil or position to see if you can improve it's appearance.

thanks for all your help on this matter