What is lawn aeration and why does it matter?
Lawn aeration is the process of creating small holes in the soil to allow air, water, and nutrients to reach the grass roots. Over time, foot traffic, mowing, and natural settling compact the soil, especially on heavy clay soils common across Cambridgeshire. Compacted soil restricts root growth, reduces drainage, and creates conditions that favour moss and weeds over healthy grass. Aeration breaks up this compaction and encourages deeper rooting. There are two main methods: spiking, which pokes holes without removing soil, and hollow-tining, which removes small plugs of soil. Hollow-tining is more effective because it physically relieves compaction rather than just displacing it. A well-aerated lawn drains faster, recovers better from drought, and grows thicker.
When should you aerate a lawn in the UK?
The best time to aerate a UK lawn is autumn (September to October) or spring (March to April). Autumn aeration works particularly well when combined with overseeding and autumn feeding, as the soil is warm and moist. Spring aeration helps relieve compaction from winter and prepares the lawn for the growing season. Avoid aerating during the summer when dry soil makes it difficult to push the tines in, and in winter when the ground is frozen or waterlogged. For Cambridge gardens on clay soil, ELawnCare recommends annual autumn hollow-tining as the single most impactful maintenance task after regular mowing. Sandy soils need less frequent aeration, typically every two to three years.
How much does lawn aeration cost?
Professional lawn aeration in the UK costs £3 to £6 per square metre, or £100 to £300 for a typical garden. In Cambridge, ELawnCare charges from £80 for a small garden and offers aeration as part of seasonal lawn care packages. The cost depends on lawn size, soil type, and whether the job includes top-dressing with sand or compost afterwards. DIY aeration with a garden fork or manual aerator is free but labour-intensive and less effective than powered hollow-tining for anything larger than a small front garden. Hiring a powered hollow-tine aerator costs £50 to £80 per day from a tool hire shop, which makes sense for medium-sized lawns if you are comfortable using the machine.