I have a potted kumquat tree that I received a year ago. It was fruiting and continued to fruit throughout the summer. I brought it inside over the winter and it is thriving with a beautiful canopy of leaves. I have applied a hybrid fertilizer that has a bit of synthetic and a lot of organic plus beneficial bacteria and mycorrhizal fungi about every 4 to 6 weeks. I moved it back outside after frost and it is still beautiful but not flowering or bearing fruit. Any suggestions?
Kumquats do not like to be root bound.
It may need to be repotted into a larger pot.
Here is a link to refresh you on the care and recommended fertilizer schedule.
https://www.gardeningknowhow.com/edible/fruits/kumquat/growing-kumquat-trees.htm
Our kumquat tree that is planted outside is 1-2 feet too tall to reach the fruit. Can we cut the top out of it? If so, how? The tree is about 10 years old and very productive but is blocking the window. We live in Savannah, GA. Thank you.
I would advise against topping your tree as it can permanently damage and disfigure it. Here is an article that will explain how tree topping hurts trees:
https://www.gardeningknowhow.com/ornamental/trees/tgen/tree-topping-information.htm
My kumquat tree had a lot of fruit; it still has fruit lingering on it plus now green ones are showing up. Should I remove the fruit that is probably over ripe?
Yes, never leave over ripe fruit on a fruit tree. This invites insects and disease.
https://www.gardeningknowhow.com/edible/fruits/kumquat/growing-kumquat-trees.htm
Is it possible for my kumquat tree, which hasn't produced fruit in many years, to suddenly be growing a different type of fruit? We were decorating it for Christmas (it's about 25 feet tall now) and noticed very dark blue to black berries on it, about the size of peas. How is this possible? Crazy, huh? Have you ever heard of this happening? Thanks for your help! Robin Rowan
Kumquats are grown unto root stock of another citrus fruit.
It is possible that the fruit you are seeing is from the root stock.
I was unable to locate any image that would match the description that you have given.
Here is a link that describes the most common root stock used.
https://aggie-horticulture.tamu.edu/citrus/miscellaneous.htm
My kumquat tree has pale green leaves with yellow blotches. It grows very slowly and only produces a few fruit every year. It is planted with a lemon tree and a key lime tree. All of the trees are approximately 10' apart. The other 2 citrus trees are doing fine. They all get the same water, sun, fertilizer and the bed is weeded regularly. The soil level on all of the trees is about 2" below the graft. I don't know how to fix the problem.
This could be nutritional in nature or something more serious.
I have listed several links that will help identify the cause.
http://www.ipm.ucdavis.edu/PMG/C107/m107bpleaftwigdis.html
http://ucce.ucdavis.edu/files/datastore/530-15.pdf
https://www.gardeningknowhow.com/edible/fruits/kumquat/growing-kumquat-trees.htm
I have a white scaly substance on the branches and now white clouds that look like spider webs on the tree. How can I treat it? Thanks.
This could be Scale, Aphids and or Mealybug or combination of these pests.
Here are links with more information including how to treat the tree.
http://ucce.ucdavis.edu/files/datastore/530-15.pdf
https://www.gardeningknowhow.com/edible/fruits/citrus/controlling-citrus-scale.htm
https://www.gardeningknowhow.com/plant-problems/pests/insects/control-plant-scale.htm
https://www.gardeningknowhow.com/plant-problems/pests/insects/woolly-aphid-control.htm
https://www.gardeningknowhow.com/plant-problems/pests/pesticides/homemade-soap-spray.htm
https://www.gardeningknowhow.com/edible/fruits/kumquat/growing-kumquat-trees.htm
I bought a couple of Meiwa kumquat trees in a 5 gal containers. I intend to transfer in a bigger clay pot. I have to wait a couple more months before I can transfer them to their new pot. I water the trees once I see that it is dry but have not given them any plant food. Is this ok or should I give it feed when watering?
Here are some articles that will help you.
https://www.gardeningknowhow.com/edible/fruits/kumquat/growing-kumquat-trees.htm
https://www.gardeningknowhow.com/edible/fruits/kumquat/kumquat-not-flowering.htm