Why are my citrus leaves yellow (winter)?
Yellow citrus leaves are fairly common in late winter, often after winter fruit production and before spring new growth. You will want to apply fertilizer before the tree begins to bloom again. The UC Integrated Pest Management website has cultural recommendations for citrus
. Look especially at the fertilizing recommendations
Tomato leaves turning yellow, plant dying
A few yellow leaves at the base of a tomato plant are often of no concern. However, when the plant has a significant number of yellowing leaves and the problem starts with one branch or side of the plant and then spreading, it may be infected with ...
Citrus Tree Problems
If you have problems with a citrus tree—including orange, lemon, lime—UC has resources that may help: Citrus Diseases and Disorders of Leaves and Twigs covers a range of problems including branch dieback, sooty mold, yellow leaves, and more. This ...
Unsightly leaves at the tips of new citrus branches are often caused by citrus leafminers. They originate from a tiny moth that lays eggs only on new citrus tree growth. Its larva then tunnels around inside the leaf, eating between the top and bottom ...
Citrus Sprouting Rootstock
Nursery-grown citrus plants generally consist of a desirable variety grafted onto a rootstock cultivar. "The rootstock cultivar makes up the lower few inches of the trunk and the tree’s roots. The scion cultivar makes up the rest of the trunk and ...
If you're interested in cloning citrus, you should know about the Citrus Clonal Protection Program (CCPP). The CCPP "provides a safe mechanism for the introduction into California of citrus varieties from any citrus-growing area of the world" and ...