Why Are My Laurel Leaves Turning Yellow?

Are yellow leaves on Laurel always a problem?

No. Laurel is evergreen, but evergreen does not mean that every leaf remains on the plant indefinitely.

Older leaves are gradually replaced by new growth, so it is normal to see occasional yellow leaves deeper inside an otherwise healthy hedge. These older leaves will eventually fall away.

You should investigate further if large numbers of leaves are yellowing, several plants are affected, new growth is pale, the hedge is losing vigour, or the yellowing is accompanied by wilting, brown patches or dieback.

The most useful starting point is not the colour alone. Look at where the yellow leaves are appearing and what the soil around the roots feels like. Yellowing, technically called chlorosis, can have many causes and the pattern often helps identify the underlying problem. much water and poor drainage

One of the first things to check is whether the ground is staying too wet.

Laurel prefers moist but well-drained soil. If the soil remains saturated for prolonged periods, particularly on heavy or compacted ground, there is less oxygen available around the roots. The roots then struggle to function properly and the foliage can begin turning yellow.

Do not assume that a yellowing Laurel needs more water.

Push a trowel or narrow spade into the soil beside the plant and check several centimetres below the surface. If the ground is persistently wet, sticky or saturated, adding more water or fertiliser is unlikely to solve the problem.

Where poor drainage is the cause, the priority is improving the conditions around the root system rather than trying to force new top growth with feed. Prolonged waterlogging can eventually lead to root damage, leaf loss and dieback. little water can also cause yellow Laurel leaves

The opposite problem can produce surprisingly similar symptoms.

Drought or an inadequately watered root ball can cause Laurel leaves to yellow before they brown or fall. This is particularly common with newly planted hedging because the roots have not yet spread far into the surrounding soil.

Large Laurels can be especially vulnerable because their evergreen foliage continues losing moisture while the newly planted root system is still restricted.

Do not judge moisture simply by looking at the soil surface. Dig down and check the soil where the roots actually are.

With pot-grown or root-balled Laurel, it is also important to check the original root ball itself. Surrounding soil can appear damp while the root ball at the centre is dry.

Our guide to planting a Laurel hedge explains how watering requirements change according to plant size, root type, weather and soil conditions. do newly planted Laurel leaves turn yellow?

Some yellowing after planting is relatively common.

Moving a plant from a pot, nursery field or root-ball environment into its permanent position temporarily changes the balance between the roots and the foliage. The plant needs time to establish new roots into the surrounding soil.

During this period, yellow leaves can indicate:

• a dry root ball
• excessive watering
• poor drainage
• planting too deeply
• root disturbance
• competition from weeds or nearby established plants

A recently planted Laurel should therefore be checked at the roots before it is automatically fed.

If the soil moisture is suitable and the stems and new growth remain healthy, losing a proportion of older foliage does not necessarily mean the plant has failed. a lack of nutrients make Laurel leaves yellow?

Yes, but nutrient deficiency should not automatically be assumed whenever a Laurel turns yellow.

A general pale appearance and weak growth can indicate a shortage of available nutrients. The pattern can provide further clues.

Nitrogen deficiency tends to produce a more general yellowing that commonly begins on older foliage. Iron deficiency tends to affect younger leaves first, with the tissue between the veins becoming yellow while the veins remain greener.

Soil conditions can also affect whether nutrients are available to the plant. Cherry Laurel, Prunus laurocerasus, can develop chlorosis on poor, shallow chalky soil even though nutrients may physically be present in the ground. one reason we recommend checking soil moisture and growing conditions before reaching for fertiliser.

For an established hedge growing in suitable soil, a balanced hedge fertiliser can support healthy growth where feeding is appropriate. It will not, however, correct roots sitting in saturated soil.

What if the leaves are yellow with brown spots or holes?

Yellowing accompanied by spots or holes deserves a closer look because the problem may involve the foliage rather than simply the roots.

Cherry Laurel and Portuguese Laurel can be affected by several leaf diseases, including powdery mildew, leaf spot fungi and bacterial shot hole.

Leaf spot and shot hole can initially produce brown areas surrounded by yellow tissue. The damaged centre may eventually fall away, producing the characteristic small holes often seen on Laurel leaves.

If the leaves have distinct spots, holes, powdery growth or distorted areas, compare the symptoms with our complete Laurel hedging care guide rather than treating the hedge simply as a watering or feeding problem. can I tell why my Laurel is turning yellow?

Work through the plant in this order.

1. Check whether it is only older leaves

A few yellow leaves inside a vigorous green hedge are normally part of natural foliage replacement.

2. Check the soil below the surface

Do not rely on the top few centimetres. Check the actual root zone.

If it is very dry, the plant may need a thorough watering.

If it is continually saturated, investigate drainage before watering again.

3. Check the original root ball on new plants

This is particularly important during the first growing season. The surrounding soil and original root ball can hold very different amounts of moisture.

4. Look at the yellowing pattern

Uniform pale growth may indicate a nutritional issue.

Yellow tissue between greener veins can point towards nutrient availability or soil pH.

Yellowing associated with spots, holes or powdery deposits suggests you should investigate pests or disease.

5. Look at the whole plant

Check whether the Laurel is producing new growth, whether the stems remain healthy and whether neighbouring plants are showing the same symptoms.

One struggling plant in a long hedge may have a local root or planting problem. Yellowing across an entire hedge may suggest a wider issue involving soil, weather, watering or nutrition.

How do I get yellow Laurel leaves green again?

Existing yellow leaves will not always return to their original dark green colour, so judge recovery by the condition of the plant and the new growth rather than expecting every damaged leaf to recover.

Correct the underlying cause first.

If the root zone is dry, water thoroughly and monitor it.

If the soil is waterlogged, reduce unnecessary watering and investigate why the area is not draining.

Keep weeds and grass away from newly planted Laurels because they compete for moisture and nutrients.

A layer of suitable organic mulch can help reduce moisture loss and improve the root-zone environment, but do not pile mulch against the stems.

Where an established hedge is growing actively and soil conditions are suitable, a balanced fertiliser can be used according to the product instructions to support future growth.

Most importantly, do not try to treat yellow foliage until you have checked the roots and soil. Feeding a plant whose roots are struggling because they are waterlogged will not correct the underlying problem.

When should I be concerned about yellow Laurel leaves?

Investigate promptly if:

• yellowing is spreading rapidly
• entire branches are dying back
• the hedge wilts despite wet soil
• roots are black, soft or decaying
• several plants suddenly decline
• leaves show unusual spotting or severe distortion
• newly planted Laurels continue deteriorating despite suitable watering

Laurel is generally a tough hedging plant, and many yellowing problems can be corrected once the cause is identified.

The key is diagnosis first and treatment second.