Maintaining a lush, healthy lawn is a year-round commitment that requires careful planning and knowledge about the right upkeep techniques. Among the essential tasks for ensuring the vitality of your grass is fertilisation. However, knowing exactly when to fertilise your lawn can be the difference between fostering a vibrant green oasis and dealing with a lacklustre garden. In the UK, with its unique climate and seasonal changes, timing your fertilisation appropriately is crucial. This blog post will guide you through the best times to feed your grass across different UK seasons.

Understanding the Seasons: A Calendar for Lawn Care

The UK's climate varies from region to region, but generally, it experiences four distinct seasons. Each season plays a pivotal role in lawn care strategies, particularly when it comes to fertilisation.

Spring (March to May)

Spring is a vital time for your lawn as it marks the end of dormancy and the beginning of active growth. This is the period when your grass needs plenty of nutrients to support its growth spurt. The best time to start fertilising is mid-to-late spring, once the frost has cleared and temperatures consistently stay above 5°C. A slow-release nitrogen-based fertiliser is ideal during this period, providing steady nutrition over several weeks.

Summer (June to August)

Your lawn's nutritional needs peak during the summer months, especially if there's a mixture of warmth and wet weather, typical of many UK summers. However, over-fertilising in this period, particularly with high-nitrogen feeds, can lead to rapid, sappy growth, making the grass more susceptible to diseases and pests. The key is to use a balanced fertiliser in early summer, ensuring it's well-watered to avoid scorching the grass.

If the summer is exceptionally hot and dry, it's best to hold off fertilising until the weather cools down and there's sufficient moisture. Over-fertilising during a drought can cause significant damage to your lawn.

Autumn (September to November)

Autumn is the perfect time to prepare your lawn for the colder months ahead. Fertilising in early autumn helps to recover the grass from any summer stress and supports root growth, making it more resilient to the upcoming winter. A fertiliser high in potassium and low in nitrogen is best during this season, as it aids in strengthening the grass against frost and disease.

Winter (December to February)

Generally, it's not advisable to fertilise your lawn during the winter months in the UK. The grass growth significantly slows down, and the ground is often too wet or frozen, which can impair the absorption of nutrients. However, if the winter is mild and your lawn appears to be struggling, you could consider applying a winter-grade, low-nitrogen fertiliser.

Tips for Effective Fertilisation

  • Test Your Soil: Before fertilising, it's beneficial to test your soil to understand its current nutrient levels and pH. This information will help you choose the most effective fertiliser.
  • Follow Instructions: Always adhere to the manufacturer's instructions regarding dosage and application frequency to avoid over-fertilisation.
  • Water Your Lawn: Ensure your lawn is adequately watered after fertilising to help soil absorption and prevent leaf burn.
  • Monitor Weather Forecasts: Try to fertilise your lawn before a day of light rain, which can help wash the fertiliser into the soil. Avoid fertilising before heavy downpours to prevent runoff and wastage.


Fertilising your lawn at the right time is key to achieving a healthy, green garden. By understanding the needs of your grass throughout the UK's seasons and following best practices for fertilisation, you can ensure your lawn remains vibrant and robust all year round. Remember, lawn care is a continuous process that demands attention and adaptation to changing weather patterns and grass conditions. With proper care and timely feeding, your lawn can become a thriving, enduring feature of your outdoor space.