This definitely seems to happen at night.
It is likely mice, rats, or other rodents!
Here are some articles that will help you to control them: https://www.gardeningknowhow.com/plant-problems/pests/animals/protecting-trees-from-rodents.htm
https://www.gardeningknowhow.com/plant-problems/pests/animals/garden-mouse-control.htm
https://www.gardeningknowhow.com/plant-problems/pests/animals/treating-pests-with-castor-oil.htm
https://www.gardeningknowhow.com/garden-how-to/beneficial/attracting-owls-to-garden.htm
planted it into a larger pot and it is doing wonderful; the leaves are beautiful and it's about 16 inches tall and has side sprouts, but I don't get blossoms or fruit. Why is it? I keep it outdoors in the summer and place it indoors by a sunny window in the winter. Please help me to have it produce fruit. It looks beautiful and is growing well.
It can be 6-10 years before you see the first flower, when planted from seed!
This is assuming that you got lucky with the seed genetics. Most lemons are cross pollinated with an inedible, wild, type. Some are cross pollinated with sterile cultivars that do not produce fruit at all!
Unless planted from a clone and grafted to a vigorous root, it is best to assume that your lemon will not flower. It can be disappointing to grow a lemon from seed, expecting fruit, only to find out that it is completely sterile!
Give it 3 to 7 more years, and if you don't see flowers by then, you can safely call the tree sterile.
Here are a couple of articles that will help: https://www.gardeningknowhow.com/edible/fruits/lemons/propagating-lemon-seeds.htm
https://www.gardeningknowhow.com/edible/fruits/lemons/growing-lemon-trees-containers.htm
I had this plant for 8+years...only 3 lemons
This can be quite normal, depending on the size of the tree, but excessive fruit drop is almost always due to environmental factors.
If this is an outdoor tree, you may not be able to control these factors. If this is an indoor specimen then you may be able to control one or more factors.
This article will help: https://www.gardeningknowhow.com/edible/fruits/lemons/lemon-tree-fruit-drop.htm
My indoor lemon plant is looking a little droopy these days. I noticed some black spots on it and on closer examination discovered that it is covered in little black bugs. What are they and how do I get rid of them?
That is one of the many sap-sucking flies. They are quite easy to get rid of, though.
Here are some articles that will help: https://www.gardeningknowhow.com/special/organic/what-are-organic-pesticides.htm
https://www.gardeningknowhow.com/edible/fruits/citrus/growing-citrus-trees-indoors.htm
help to assure fruit next year
This article should help with getting your lemon tree to bear fruit (and no, you don't need to pinch the blossoms, but if the tree is young and small and can't support a bummper crop of fruit, you can remove some of the growing fruit).
https://www.gardeningknowhow.com/edible/fruits/lemons/lemon-tree-not-fruiting.htm
https://www.gardeningknowhow.com/edible/fruits/lemons/learn-about-fertilizer-for-a-lemon-tree.htm
Recently repotted a small lemon tree, and all the leaves turned yellow. It looks like it might be starting to flower though - should I feed it something?
Have you been fertilizing already? Perhaps a slow release fertilizer? If you lost all that when you repotted, it should be safe to add more slow release fertilizer. If there is question, test the soil first near the roots, then fertilize accordingly.
Hopefully, the plant is just in shock from the transplant and should recover with regular care. Also be sure the pot isn't too large and you are overwatering. The new size should be about 25 percent larger than the original pot.
I've included links to articles that should help pinpoint the cause.
https://www.gardeningknowhow.com/edible/fruits/lemons/repotting-lemon-trees.htm
https://www.gardeningknowhow.com/edible/fruits/lemons/lemon-tree-leaves-turn-yellow.htm
https://www.gardeningknowhow.com/edible/fruits/lemons/growing-lemon-trees-containers.htm
I transplanted a 3yo lemon tree in our yard two months ago. It’s a Meyer hybrid. After transplanting we experienced some cold weather (5 degrees Celsius) and a lot of wind. Many leaves have since curled and fallen off. Currently just one healthy leaf remains. I posted pictures of the healthy leaf, a curling leaf, and a brown leaf, as well as the stems. I’m concerned about potential Root rot. Can this tree be saved?
This is to be expected during the cold and wet seasons. To give it the best chance of establishing during this time you will want to add a few things to the soil, as long as a soil test reveals that there is not already too much of these ingredients present.
DOLOMITIC LIME and IRON SULFATE will be something that you will want to keep around for citrus trees. adding these to the soil, according to all packaging instructions, will help to condition the soil against infection.
Here are some articles that will offer more information on the care of citrus, and testing soil:
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/soil-ph-plants.htm
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/soil-ph-plants.htm
https://www.gardeningknowhow.com/edible/fruits/lemons/growing-meyer-lemons.htm