Why is my citrus tree dying?

Citrus trees add a vibrant, tropical feel to gardens and homes – but they can be delicate. If your citrus tree is looking unwell, there could be a number of causes. From soil issues to pests and diseases, this guide walks you through a simple step-by-step diagnosis to help identify the problem and get your tree back on track.

Use the Tree2mydoor five step checklist!

Step one: Check the soil

The first thing to check is the soil. Citrus trees need well-draining, slightly acidic soil – ideally with a pH between 5.5 and 6.5. If the soil is too alkaline, the roots won’t absorb nutrients efficiently, which can lead to yellow leaves and weak fruit production. Use a soil pH test kit and amend the soil as needed with compost or ericaceous mix.

Step two: Inspect the leaves

Yellowing leaves with green veins could be a sign of iron deficiency. Pale or wilted leaves may indicate water stress. If leaves are falling off or look distorted, inspect them closely for signs of pests or fungal problems. Healthy leaves are key to fruiting and tree vitality, so don’t ignore subtle changes.

Step three: Look for pests

Common citrus pests include spider mites, aphids and scale insects. These feed on sap, weakening the tree and causing yellowing, sticky residue, or distorted growth. Look on the underside of leaves and along stems. Treat early with natural remedies like neem oil or insecticidal soap to prevent spread.

Step four: Identify diseases

Several fungal and bacterial infections can affect citrus trees. Citrus canker causes yellow, blistered spots on leaves and fruit. Greening disease leads to bitter, stunted fruit and yellow foliage. Black spot appears as dark lesions on leaves and fruit. If you suspect disease, take a sample to a local garden centre for confirmation and treatment advice.

Step five: Ensure proper care

Even healthy trees can decline if their basic needs aren’t met. Water your citrus tree regularly, keeping the soil moist but never soggy. Feed with a citrus-specific fertiliser during the growing season, and avoid overfeeding. Prune in spring to encourage airflow and new growth. In colder months, protect your tree from frost and sudden temperature drops with fleece or by bringing it indoors.

Looking after citrus trees takes care, patience and attention to detail. By following these steps and observing your tree closely, you can usually resolve the issue and help it thrive again. Whether it’s planted in your garden or growing in a pot indoors, a citrus tree is a rewarding addition to your space – especially when it starts bearing fruit.

Support from MyTree™

Every citrus tree gifted through Tree2mydoor includes access to our MyTree™ support system. Once registered, you’ll receive monthly care guidance, tips for each season and help diagnosing any issues. Plus, our MyTree™ warranty offers extra peace of mind for the first year.

We’ve helped thousands of people successfully grow citrus trees in the UK – and we’re here to help yours thrive, too. With a little support and the right know-how, your citrus tree can grow strong, healthy and full of fruit.