The magnesium in epsom salts addresses magnesium deficiency while the sulphur helps to acidify the rooting medium. A tablespoon of Epsom salts dissolved into half a gallon of water, should do the trick and this too can be applied as a foliar spray. You can acidify the soil or compost by feeding with a liquid soluble ericaceous fertiliser, or add more iron and magnesium to the rooting medium to increase it availability.īefore commercial acidic fertilizers were available, epsom salts (magnesium sulfate) were a popular method of treating yellowing citrus leaves. This will improve the uptake of iron and magnesium which if in short supply will result in the characteristic yellowing colour known as chlorosis. If it is the older leaves that are turning yellow first and then followed by the newer growth then it s likely that nitrogen deficiency is the problem.Īlthough they are not ericaceous plants, orange trees will appreciate being kept in soil or compost that is slightly on the acidic side. If the leaves have a weird-looking inverted green V-shape at the base surrounded by yellowing then this is magnesium deficiency.
If the new growth is pale green to yellow in colour the this is sulphur deficiency. If the new growth is showing green veins with the rest of the leaf appearing light yellowish to white in colour then this is iron deficiency. If you are not feeding weekly during the growing period then nutrient deficiency is going to be just around the corner. Citrus plants are heavy feeders in general and orange trees are no exception. The most common reasons as to why the leaves on your orange tree are turning yellow are also the easiest to correct which is usually down to a lack of availability of one nutrient or another.
#POMELLO TREE LEAVES TURNING YELLOW AND FALLING OFF FULL#
The young leaves emerge in the spring a wonderful burnished, bronze colour, but once they fade to their regular vivid, mid-green colour they can often continue to change to a rather unhealthy yellow as the leave grow to their full size. One of the things that is alway a concern is the yellowing of the new growth. If you live in a northern European climate but have accepted the challenge of growing an orange tree then be prepared for certain amount of heartache, some of it justified, some not.
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