Q Why are the leaves on my camellia turning yellow?

A There are a number of reasons for this. Below are a few of the more common ones:

Lime-induced chlorosis A common cause of yellowing is lack of iron or manganese. This is normally worse on alkaline soils. An ericaceous feed that contains chelated iron or manganese may help to ease the problem. But, long term, moving the plant into a container may be more realistic. Use an ericaceous compost.

Virus Leaves and branches become mottled with yellow or white markings, and flowers exhibit ‘broken’ or mottled colouring. There is no chemical treatment for this disease: just prune out the affected parts.

Caption: Yellow leaves on camellias can be caused by different problems

Overwatering Root death leads to reduced uptake of nutrients. Cutting down on watering and applying a foliar feed may save the plant.

Phytophthora root rot Sadly, this fungus cannot be treated and can kill camellias. Reduce the risk by providing a well-drained soil. Look out for dead patches of bark near soil level. If you have to get rid of an affected shrub, don’t replant in the same spot.