My kumquat tree loses all the leaves. Will they come back or what can I do??
There can be a few different reasons for the leaves to drop from your tree.
A kumquat tree needs all day sun, soil that stays moist but drains and a regular fertilizer schedule.
Watering is key with extra water during hot and dry spells.
Aphids are common on Kumquat Trees and can cause leaf damage and eventual leaf drop. Examine the tree for signs of the insects.
Neem Oil can be used to treat these insects.
Citrus Canker can also attack a Kumquat Tree causing scaring on the branches and trunk.
Liquid cooper fungicide is used to treat this fungus.
Here are some links with more information.