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Why are my hibiscus and rose leaves turning yellow?

Submitted: 05:49PM, 03 Jan 2019
Answer: Hi Nicole,

Apologies for the delay in getting back to you. We received a huge amount of queries over the Christmas break that we’re slowly working our way through. We appreciate your patience!

Hibiscus leaves could be turning yellow for a few reasons. As leaves naturally mature they can turn yellow before they drop from the plant.

Leaves can also yellow because the plant is moisture stressed (which is not uncommon during hot or dry summers). Have a gentle dig around in the soil in the plant’s root zone and see whether the soil feels dry. They’ll appreciate regular deep watering each week during summer if you’re not getting much natural rainfall.

Another reason for yellow leaves could be lack of nutrients. If you apply a complete fertiliser like Yates Thrive All Purpose Soluble Fertiliser around the root zone each week (2 spoonfuls in a 9 L watering can), that will help to supply the hibiscus with the main nutrients it requires and help to green up the leaves if the plant is a bit nutrient deficient.

A final reason could be insect pests. There are some sap sucking pests like aphids and spider mites which suck the goodness out of leaves and can cause them to mottle and yellow. Have a look at the stems and leaves (including underneath) and see whether you can spot any insect pests. They can be very tiny! Some regular sprays of an insecticide like Yates Rose Gun will help get insect pests under control.

So to sum up, check the moisture levels in the soil, give your hibiscus a good feed and check for pests. Hope it looks lovely and green soon!

Happy gardening, Angie

Category: General
Answered: 02:05PM, 06 Feb 2019


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