I have a large walnut tree and now have damp patches like water damp on my ground is it the tree causing this.
Unfortunately, your photo did not come through. It is likely not the cause. It probably doesn't help, though.
Likely, under the tree, rain will not evaporate as fast as in the open. That may be what is causing the spots in your lawn.
Walnuts are also notorious for killing off certain plants and grasses, though.
Here is an article that will help:
https://www.gardeningknowhow.com/garden-how-to/info/allelopathic-plants.htm
https://www.gardeningknowhow.com/edible/nut-trees/black-walnut/black-walnut-compatible-plants.htm
https://www.gardeningknowhow.com/edible/nut-trees/pecan/pecan-tree-toxicity.htm
Could you please help identify our tree. We live in Katy, TX. We got two tree of the same but lost one to the hurricane and would like to replant them. Thank you so much and look forward to hearing from you. I have additional pictures, let me know if how ai could send them.
It is hard to say, but it appears to be a species of Walnut or related nut species.
I have a walnut tree with very healthy and prolific branch and leaf growth but doesn’t yet produce any walnuts unfortunately. Does it need other walnut trees nearby to fertilise it? I don’t know it’s age but it is about 4m high. Any advice would be very welcome, thanks. Mike W.
Our experts say walnut trees don't start really producing until they're around ten years old. https://www.gardeningknowhow.com/edible/nut-trees/walnut/planting-walnut-trees.htm.
I planted 2 knee-high carpathian (walnut) tree's about 11 yrs ago. They are probably 20-25 feet today, but they have not bloomed, nor any nuts at all ! Why not ???
They don't start producing till they are about 10 years old so yours should be about ready. Here is more:
https://www.gardeningknowhow.com/edible/nut-trees/walnut/planting-walnut-trees.htm
https://plantvillage.psu.edu/topics/walnut/infos/diseases_and_pests_description_uses_propagation
We didn't fertilize our Walnut trees in the spring. They are about six years old and have never been fertilized. We just purchased some 20-10-10 pellet fertilizer. Should we wait until next year to use it? The trees are healthy with a few hesitant leaves coming out of a few branches. Please let me know what your thoughts are. Thank you for your time.
No, this would be a bad time to fertilize. This will need to be done in early spring. This article will help:
https://www.gardeningknowhow.com/edible/nut-trees/general-nut-care/nut-tree-fertilizer.htm
Fully matured tree 40' high X 50' in Diameter. Has several hundred pounds of potential nuts. Would like to cut it back to a more manageable size. It is dwarfing an Apple and Filbert trees. How radical and aggressive can I be? Bill Downey
As aggressive as you want. These will come back with a vengeance, so if you don't want a bigger tree to deal with later on- I would remove it.
I am surprised that anything will grow near it, since it will not play nice with many plants. The tree will use chemical warfare (juglone) in the soil to kill off others in the area.
This article is specific to the relative of the walnut- the pecan. It is just as relevant:
https://www.gardeningknowhow.com/edible/nut-trees/pecan/pecan-tree-toxicity.htm
This article will offer information on juglone resistant species:
https://www.gardeningknowhow.com/edible/nut-trees/black-walnut/black-walnut-compatible-plants.htm
This article pertains to tree removal:
Assuming that these are native nuts from native trees, the best way is to put them where you intend to grow them and let nature take its course. If this is a non-native tree, then make sure that it is hardy in your area. Many are not.
This article will help you:
https://www.gardeningknowhow.com/edible/nut-trees/black-walnut/planting-black-walnut-trees.htm