Why my kumquot tree leaves turning yellow?
My young about 1 meter tall kumquot tree in the ground is now bearing ripen bright yellow fruits in the middle of Sydney winter but the leaves are turning yellow even I keep the soil moist and feeding it with fertilizers. However the leaves are not falling and the tree just looking unhealthy.
Certified GKH Gardening Expert
Yellow leaves can be caused by many things including lack of nitrogen, insufficient light, water-logged soil (plant roots need oxygen to thrive), dry soil, or iron deficiency. ... If new leaves are yellow with green veins, the problem may be a lack of iron.