Lemons are covered in a walt like skin decease? Can this be prevent, cured. Is the lemon safe to eat?
They are edible, and safe. They may not be the best, but they can still be safely eaten. This looks like the beginning of what is called Citrus Brown Rot. This nasty infection will eventually destroy the tree if left untreated.
There are many ways to do so, but the best way is to apply wettqable fulfur and dolomitic lime to the soil. There are many things you can do along with this. This collection of articles will help you: https://www.gardeningknowhow.com/special/organic/
My lemon tree experienced an unusually cold winter when temperatures dipped below 32 on two occasions. It had a few blooms on it before this freeze hit and a lot of lemons. Most of the leaves have turned brown and have fallen. On the south side of the tree there are still green leaves and green stems. I have pruned the tree every year so it isn't taller than six - seven feet. I wanted more of a bush appearance than a tree. When should I prune the tree this year and how?
I would wait to prune these until spring. This will allow you to see what would be the best growth to keep around. Here is a collection of articles for more information on the care of lemon trees: https://www.gardeningknowhow.com/edible/fruits/lemons/
For 2 years now, my lemon tree has produced lemons that are extremely bitter. How do I counteract this? What would cause this?
This is usually the case when the lemon is not fully ripe. Even if it is yellow, it can still be far off from ripening. The same goes for green lemons. Sometimes they are ripe and never turn yellow. It can take up to nine months for these fruit to ripen properly from the time they start to form.
You should also be feeding this a citrus fertilizer at least once per year.
Here is an article that will help: https://www.gardeningknowhow.com/edible/fruits/lemons/lemons-stay-green.htm
How many blooms are too many, and should I remove the buds next to the flowers?
It is not necessary to remove them. Most will drop before being pollinated anyways. If you do want to remove any, I would only recommend removing the tips of the branches. Other than that, It is not necessary to take any action.
My lemon tree still has fruit on it that looks green but it is now blooming with lots of flowers. Should I pick the fruit even though some of it looks quite green?
These can take as long as nine months to ripen. If it has been this long then you can pick one and sample it. Color is not a good indicator of ripeness.
Lemon plantation has dev brown patches on the shoot and the new leaves are gone .help
This is a difficult one. I can't really see the pictures as well as I'd like. It looks like scale damage to me. This is very common. They will destroy trees pretty easily. I would take pictures and samples to your local extension. They will be able to tell you more. Here is a link to help you find the closest one to you: https://www.gardeningknowhow.com/extension-search/
The lemon tree's leaves in our garden has been yellowing starting out as spots/patches before turning the whole leaves yellow. We notice that a lot of the newer leaves growing out at the top of the tree has also started curling up, with some sort of sludge on them while others are just riddled with holes. What is wrong with our tree and what can we do to fix it hopefully? We have had quite a wet weather this past week so I don't think its from lack of water at least.
No, if anything, they are getting too wet. There is not much that you can do to stop this. You can, however, apply both dolomitic lime, and wettable sulfur to the soil. This will correct the majority of the issue.
The insect problem can be corrected in many ways as well. I will include a link to a collection of articles that will give you information on crafting your own pesticides, along with many other organic gardening tips: https://www.gardeningknowhow.com/special/organic/