Top Questions About Walnut Trees

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Questions About Walnut Trees

Asked by
Anonymous on
May 29, 2015

Q. Walnut Tree Disease

I have a young walnut tree which is in its 3rd year that was planted by a squirrel in a plant pot in my garden. It has been in a large terracotta pot and has grown well each year and has been healthy. The tree has started to leaf again over the past 4 weeks with no problems until I noticed this morning there is some dark brown liquid seeping from a couple of different areas on the main trunk of the tree. Can you please advise. . .

Answered by
shelley on
May 30, 2015
Certified Expert
A.

Based on my research, I believe that your tree has a bacterium named 'Brenneria nigrifluens' which causes shallow bark canker in walnut trees. It would cause the dark brown liquid exuding from the main trunk of your tree. Since this canker does not significantly harm walnut trees there are no published control measures.

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Asked by
pareltap on
June 16, 2015
i live in east london area

Q. best treatment for bubbles on walnut tree leaves

I have a walnut tree and the leaves are getting bubbles. I need to buy some treatment, so please advise to me on what is the best treatment to resolve it. Thanks.

Answered by
Downtoearthdigs on
June 18, 2015
A.

It sounds like leaf galls.
Here is an article that will help you.

https://www.gardeningknowhow.com/plant-problems/environmental/treating-leaf-gall-on-plants.htm

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Asked by
Anonymous on
August 9, 2015

Q. Our walnut tree is dying

Our black walnut tree is dying. From the information I have read, my guess would be MLO or the Walnut twig beetle. How can we save our beautiful tree? We thank you so much for your efforts.

Answered by
shelley on
August 9, 2015
Certified Expert
A.

Below are some articles on thousand cankers disease and the walnut twig beetle that will help you:

https://extension.colostate.edu/pubs/insect/0812_alert.pdf
http://www.ipm.ucdavis.edu/EXOTIC/thousandcankers.html
http://www.thousandcankers.com/

For further information on cankers on trees, please visit the following link:

https://www.gardeningknowhow.com/ornamental/trees/tgen/cankers-on-trees.htm

Happy gardening!

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Asked by
Anonymous on
September 12, 2015

Q. vegetable garden

Had small garden this summer but it didn”t produce anything. Could it have been because there was a hickory nut tree and a walnut tree next to it? If so, could I still have the garden there if they were cut down?

Answered by
Downtoearthdigs on
September 14, 2015
A.

It is doubtful that the trees prevented the garden from producing, especially if the plants were healthy. However, if they cast too much shade, then this could be an issue. Also, the walnut tree is nothing to worry about unless it's a black walnut, which would literally poison the ground around it.

If you are getting plenty of flowers but nothing produces in the garden, then it is most likely due to poor pollination. Hand pollination often helps. These articles will help you with attracting more pollinators:
https://www.gardeningknowhow.com/ornamental/trees/teak/insect-pollination-process.htm
https://www.gardeningknowhow.com/garden-how-to/beneficial/creating-a-pollinator-garden.htm

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Asked by
elsameg on
October 22, 2015
LL20 8Bh

Q. Pruning walnut tree

We have a large walnut tree in our garden and it needs pruning back as it’s blocking out a lot of sunlight in our garden. When is the best time of year to do this?

Answered by
Downtoearthdigs on
October 23, 2015
A.

The best time of year to prune the Black Walnut Tree is when the sap is up in the tree, not coming up.
That would be about in spring, before the tree begins to leave out.
Do not prune in Fall or Winter. You don't want to open an injury when the tree has no time to heal.

https://www.gardeningknowhow.com/edible/nut-trees/walnut/planting-walnut-trees.htm

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Asked by
Beckym on
April 11, 2016
48307

Q. Water coming from Walnut Tree

I recently used a nail to put up a squirrel feeder on a mature walnut tree in our yard. Shortly after, I saw what appeared to be water coming from the hole where the nail is. I removed the nail and it still continues to drip. Can you tell me if this damaged the tree in any way?

Answered by
Downtoearthdigs on
April 12, 2016
A.

The small hole won't likely harm the tree. The tree is dripping sap and it should heal up on it's own.
Watch the area for any signs of insects or a continued presence of fungus.

On a side note, we are having some mature Walnut Trees logged from our yard and they use metal detectors to ensure that no nails have been used on the trees, as they make the tree unsellable as lumber.

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Asked by
Halweg2073 on
May 17, 2016
52144

Q. Walnut tree

If our walnut tree froze in the spring, will it get new leaves?

Answered by
kh0001 on
May 19, 2016
A.

It depends on the zone you're in (check here https://www.gardeningknowhow.com/planting-zones/usda-planting-zone-map.htm) and the variety of walnut tree.

All of them leaf out pretty late, so I'd be surprised if yours didn't sprout new growth.

This article may also help you: https://www.gardeningknowhow.com/edible/nut-trees/walnut/planting-walnut-trees.htm

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