Im trying to find out what the black growth is on my plum tree. I would like to know what I should do to fix the problem. Thank you.
This looks like black knot fungus. It is very common in plums, and other related species. Control is quite difficult. You will need to remove any infected growth, and treat with fungicides, near constantly. This can be permanent, as well. Replacing the tree with something else from outside of the Prunus genus would be a more permanent option for control.
https://www.gardeningknowhow.com/edible/fruits/plum/plums-with-black-knot-disease.htm
My 13 year old plum tree began looking very sad last year. It had produced fruit every other year, but then every year from 2020-2022, but last year began looking sad. One branch completely died, now another is looking as if it is following. Nothing has changed that I am aware of, to cause an issue. I have started growing some veg in pots in my small garden over this time.
These articles should help pinpoint the problem.
https://www.gardeningknowhow.com/edible/fruits/plum/plum-tree-diseases.htm
https://www.gardeningknowhow.com/edible/fruits/plum/plum-tree-is-bleeding-sap.htm
https://www.gardeningknowhow.com/edible/fruits/plum/plum-bacterial-canker.htm
https://www.gardeningknowhow.com/edible/fruits/plum/plums-with-black-knot-disease.htm
https://www.gardeningknowhow.com/edible/fruits/plum/plum-tree-fertilizer.htm
https://www.gardeningknowhow.com/edible/fruits/plum/plum-tree-fruit-spray.htm
to expect aphids Never had a plum yet!
To get fruit, the best thing to do is follow a regular spraying schedule for insects and diseases, plus you need to fertilize and prune properly. Here is more:
https://www.gardeningknowhow.com/edible/fruits/plum/plum-trees-not-fruiting.htm
https://www.gardeningknowhow.com/edible/fruits/plum/plum-tree-fertilizer.htm
https://www.gardeningknowhow.com/edible/fruits/plum/plum-tree-fruit-spray.htm
https://www.gardeningknowhow.com/edible/fruits/plum/common-plum-tree-pests.htm
https://www.gardeningknowhow.com/edible/fruits/plum/plum-tree-pruning.htm
https://www.gardeningknowhow.com/edible/fruits/plum/plum-fruit-thinning.htm
https://www.gardeningknowhow.com/edible/fruits/plum/plum-bacterial-canker.htm
https://www.gardeningknowhow.com/edible/fruits/plum/treating-rust-on-plum-trees.htm
https://www.gardeningknowhow.com/edible/fruits/plum/plums-with-black-knot-disease.htm
https://bookstore.ksre.ksu.edu/pubs/MF3430.pdf
https://s3.wp.wsu.edu/uploads/sites/2086/2014/05/spray_home_plums_prunes1.pdf
They get full of healthy leaves in the spring, but shortly after, the leaves get full of holes that star as yellowish and turn brow and then the brown spot dissapear and leaves an empty space, and then shortly after the trees get sad and there are no fruits or more leaves. Please help. I'm so disappointed and frustrated.
This does sound like shot hole. This can be caused by a number of bacteria and fungi, so treatment can be difficult to pin down. Generally, most of the shot hole diseases have no cure. All you can do is maintain them to lessen symptoms. Treating with a fungicide and keeping all infected debris away from your tree.
https://www.gardeningknowhow.com/edible/fruits/plum/managing-bacterial-spot-on-plums.htm
https://www.gardeningknowhow.com/edible/fruits/plum/growing-plum-trees.htm
Your county extension can help you pin down exactly which species you are battling, which could help you tailor treatment to that specific disease. The bottom of this page contains a search form to find the closest one to you:
https://www.gardeningknowhow.com/garden-how-to/info/what-is-extension-service.htm
I have two health plum trees bought from a reputable online dealer, planted 10 years ago, , 15 feet apart, with loads of blossoms, never produce any plums. Tried using blossoms from a good producing tree on blossom on my trees, nothing again. Any hints to help get plums. We have plenty of flying insects for pollination. We have apple tees, Elderberry, grapes, etc… all produce loads of fruit. All within 20 feet of the plum.
It sounds like you were sold and ornamental fruitless tree. These are popular in some of the purple leaf cultivars. If you know what cultivar that you purchased you could check to see if it is a fruitless variety or not.
y although it has never produced any fruit. Understandably, the leaf drop increases at this time of year. The soil is fairly heavy, clay based. Any ideas about what might be causing the problem ?
Is it a purple-leaf plum tree? They produce drupes that wildlife enjoy. Here is information on leaf dropping:
https://www.gardeningknowhow.com/edible/fruits/plum/plum-tree-dropping-leaves.htm
https://www.gardeningknowhow.com/edible/fruits/plum/purple-leaf-plum-care.htm
We have a 1 year old plum tree that is near 6 foot and seems determined to reach for the stars rather than develop side branches. Is this to be expected or is there something we can do to encourage side growths?
These articles will explain how to get your plum tree off to a good start:
https://www.gardeningknowhow.com/edible/fruits/plum/plum-tree-pruning.htm
https://extension.psu.edu/pruning-and-training-home-fruit-trees-to-an-open-center