Most of my shrubs and trees are infected with a grey fungus, which I have used umpteen things to try to remove without success. The branches of the affected shrub/tree eventually go very brittle and can be too easily broken off. Some of the shrubs have died. Any ideas what the fungus is and how I can treat it? My garden, despite efforts to fix (including drainage pipes), gets easily waterlogged.
This sounds like lichen, which is actually a symptom rather than a cause of the problems on the trees. Lichen often like trees or branches that are dying or dead, which leads many people to think that the lichen is to blame for the problem.
If your garden is often waterlogged, you may have a fungus in the roots of the trees that are killing them. Are you seeing any other signs of problems in the trees? What do the leaves look like when the branches are dying?
I have scrub bushes and trees That I need to get rid of. They are too close to the house and a problem. I have pulled them up by the roots and put salt on them but nothing is happening. What do I need to do? Not sure what they are, as there were here when I moved in and the previous people couldn't get rid of them either.
This article should help you with this:
https://www.gardeningknowhow.com/weed-identification-control/weed-trees.htm
I have rust on some shrubs. How do I treat them using natural methods?
Rust happens mostly because of poor air circulation in a plant. The best and most natural way to help with this is do do a little pruning to open up the plant and allow better air circulation.
Treating the plant with a fungicide will also help. Neem oil, which is organic, is an effective fungicide (and pesticide). Sulfur or copper based fungicides are also effective.
How can I treat shrubs with little white bugs on leaves?
It sounds like maybe aphids or scale. Either way, the whole group of pests that affect plants are treated the same way. I personally like to use neem oil. It is organic, safe for pets and people, very effective and treats the plants for other issues it may have. Here is more information:
https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm
Can you please advise if there is anything I can do to heal shrubs and small trees whose bark has been eaten by rabbits in the recent snowy spell. The bark has been stripped up to 18 inches from ground level.
These articles will help you:
https://www.gardeningknowhow.com/ornamental/trees/tgen/repairing-tree-bark-damage.htm
https://www.gardeningknowhow.com/plant-problems/pests/how-to-keep-rabbits-out-of-gardens.htm
I have this powder stuff in my hedges. When I kicked the shrub, the dust went flying. There is also a huge patch of this laying on top of the hedges. I don't know if it is mold or what. If it is, How do I get rid of it? Can you help? It's through all of my shrubs.
It sounds like it is powdery mildew. These articles will help:
https://www.gardeningknowhow.com/problems/get-the-cure-for-powdery-mildew.htm
https://www.gardeningknowhow.com/plant-problems/disease/powdery-mildew-homemade-and-organic-remedies.htm
This bush is about ten years old. A month ago it started changing color (branches and leaves) to a light pea green color and the leaves began to drop. What is happening, and can I save it? The other bush is ten feet away and not affected.
It sounds like a nutrient deficiency, most likely nitrogen, but it could be a micro nutrient as well. I would fertilize the plant with a complete, but nitrogen heavy fertilizer. You may also want to get the soil tested to better identify what the nutrient lack exactly is.