Lavender is a tough and rewarding garden plant, but even the healthiest plants can sometimes run into trouble. If your lavender is looking less than its best, don’t worry—most issues can be solved with a few practical steps. Here, we’ll walk you through the most common problems gardeners face with lavender in Dutch and Belgian gardens, and what you can do to help your plants recover.

Yellow or Brown Leaves

Yellowing or browning leaves are a frequent concern. This can be caused by:

• Too much water: Lavender prefers dry, well-drained soil. Prolonged wetness can lead to root rot and yellow leaves. Check if the soil feels wet below the surface, especially after rain.
• Poor drainage: Heavy clay or compacted soil can trap water around the roots. Consider improving drainage if you notice standing water after rain.
• Natural aging: Older leaves at the base may turn yellow and drop off, especially after flowering. This is normal if the rest of the plant looks healthy.

If your lavender is in a pot, make sure excess water can drain freely. Avoid watering unless the top few centimeters of soil are dry.

Fungal Diseases and Rot

Lavender is generally resistant to most diseases, but prolonged dampness can lead to fungal problems such as:

• Root rot: Plants may wilt, develop soft stems, or die back from the base. This is often due to waterlogged soil.
• Leaf spots or grey mold: You may see fuzzy grey patches or dark spots on leaves and stems, especially in humid weather.

To reduce fungal risk:

• Plant lavender in full sun and avoid overcrowding to improve air flow.
• Remove affected leaves and stems promptly and dispose of them with household waste, not compost.
• If a plant is badly affected, it may be best to replace it with a healthy specimen in a better-drained spot.

Poor Growth or Flowering

If your lavender is not growing well or flowering sparsely, consider these factors:

• Insufficient sunlight: Lavender needs at least 6 hours of direct sun daily. Shady spots can cause leggy growth and fewer flowers.
• Rich or heavy soil: Too much fertility or moisture can encourage leafy growth at the expense of flowers. Lavender thrives in poor, sandy soils.
• Lack of pruning: Without regular pruning, plants can become woody and sparse. See our lavender pruning guide for tips.
• Plant age: Older plants may naturally decline after several years. Replacing them can refresh your border.

Winter Damage

Lavender is reasonably hardy in most Dutch and Belgian gardens, but severe winters or wet conditions can cause dieback or loss of plants. Signs include blackened stems or sudden collapse in spring. To help your lavender through winter:

• Plant in well-drained soil and avoid wet spots.
• Some varieties (like Lavandula angustifolia) are more winter-hardy than others. If you lose plants, consider trying a hardier type next time.
• In very cold or wet winters, container plants can be moved to a sheltered spot.

What to Do If Problems Persist?

If your lavender continues to struggle despite your efforts, it may be time to start fresh with a healthy plant in a better location. Browse our selection of robust lavender varieties, suitable for Dutch and Belgian gardens:

Related Advice

• Lavender: All about this fragrant garden plant
• Lavender care: Practical tips
• Lavender pruning: When and how?