I started a lemon tree from a seed. It is getting tall with only one stem. What should I do? I have it staked up right now so it won't fall over. I just love starting plants from seeds. Please help!!
I would wait at least a year or two (in age) before pruning the tree, which can be done in spring or summer. Lemon trees are pruned to maintain a pleasing shape, so you can prune as you see fit to shape it the way you like. Do not cut off more than 1/3 of the plant per year as this can hurt the plant.
Last week I started getting new branches (5 or 6) growing from the 4' trunk. It is starting to look more like a bush. Should they be trimmed? All else is doing fine.
Yes, it is probably in need of some pruning. You can prune it in spring or summer. Lemon trees are pruned mostly to maintain a pleasing shape, so you can prune as you see fit to shape it the way you like. Do not cut off more than 1/3 of the plant per year as this can hurt the plant.
Lemon and lime trees are quite similar, including their care. Pruning lemon trees isn't any different than pruning limes. The following article should be of some help: https://www.gardeningknowhow.com/edible/fruits/lime/tips-for-pruning-lime-tree.htm
I water twice a week with 2 gallons of water each time, and it seems to drain ok. I had 9 lemons blooming from 1/2 to 2 inches, and they all seemed to dry out at the attachment point and fell off. What am I not doing correctly?
It sounds like they did not pollinate correctly. The tree will reject the fruit while it is immature if the flowers do not get pollinated. Next time it is in flower, try taking a small paintbrush and swirl it around inside each flower, one after another. This will distribute the pollen and will pollinate the flowers.
Some of my green lemons have burst open and appear to be mature. If picked early, do green lemons ripen or should I leave them on the tree until completely yellow? Some lemons have fallen on the ground.
Slightly green-yellow ones can still be picked and will normally ripen off the tree, provided they are large enough. They should be about 2-3 inches in diameter.
What compost do I use for lemon tree in a pot?
Regular potting soil will work fine. They also prefer well-draining, slightly acidic soil. Here is some help for its care: https://www.gardeningknowhow.com/edible/fruits/lemons/growing-lemon-trees-containers.htm
One year ago my lemon tree was growing and doing ok, until this year. The lemons do not grow enough, instead they fall out. What do I need to do to prevent this from happening? I don't know if there's a certain insect that is preventing my lemon tree from growing? Or do I need to put some sort of vitamins? Please tell me what should I do?
You may need to fertilize the tree. A soil test will let you know for sure what it may be lacking. These articles have information on how to fertilize your tree: https://www.gardeningknowhow.com/edible/fruits/citrus/fertilizing-citrus-trees-best-practices-for-citrus-fertilizing.htm
https://www.gardeningknowhow.com/edible/fruits/lemons/learn-about-fertilizer-for-a-lemon-tree.htm
I have recently moved onto a property with a lemon tree LOADED with fruit. However, there is some kind of mildew like fuzz on the leaves at the end of the twigs, and I am seeing blemishes on the fruit. How do I treat it? I also need to bring it back into shape. When do I prune it?
The tree could have some sort of mold or fungus, which can be treated with a fungicide, like neem oil. You may want to check the soil around it to make certain it is not getting too wet. As for pruning it back into shape, do not cut off more than 1/3 of the plant per year as this can hurt the plant. Pruning lemon trees isn't any different than pruning limes. The following article should be of some help: https://www.gardeningknowhow.com/edible/fruits/lime/tips-for-pruning-lime-tree.htm