Lawn Care Calendar & Feed Calculator (UK)
Calculate fertiliser quantities and find the right month for each UK lawn care task — feeding, mowing, scarifying, aerating, and overseeding.
As an Amazon Associate and CJ Affiliate publisher we earn from qualifying purchases. Prices and availability may vary.
What do I need to know about Spring (March-May)?
March: first feed of the year as growth restarts. Spring feed: high nitrogen (e.g. 12:6:6 or 18:6:6) at 35g/m². Lift mower height for first cuts (40-50mm). Continue mowing as growth dictates. April: peak spring growth. Mow weekly, gradually lowering height to 25-35mm. Apply weed and feed if needed (Westland Aftercut, Evergreen Complete) — kills weeds while feeding grass. May: scarify lightly if not done in autumn (light vertical raking to remove dead grass). Overseed bare patches with grass seed matched to your existing lawn type, ideally after scarifying so the seed makes good contact with bare soil rather than sitting on top of thatch.
What should I know about Summer (June-August)?
June-July: peak season. Mow 1-2 times per week. Cut height 25-35mm (slightly longer in drought). NEVER scalp the lawn — never remove more than 1/3 of grass height in one cut. Summer feed (lower nitrogen, e.g. 9:7:7): June or July. Water deeply but infrequently in drought (1 inch/25mm per week applied in 1-2 sessions, NOT light daily watering). Mowing in heat: raise blade height to retain moisture. Leave clippings on lawn ('mulching') — returns 30% of nitrogen needed. August: late summer feed. Water in the early morning or evening to reduce evaporation loss and prevent leaf scorch from droplets under strong sun.
What should I know about Autumn (September-November)?
September: AUTUMN FEED — the most important feed of the year. High potassium and phosphorus, low nitrogen (e.g. 3:10:5). Strengthens grass for winter, root development. 35g/m² of autumn fertiliser. Scarify thoroughly (mechanical scarifier ideal) — removes thatch and moss. Apply moss killer if needed (iron sulphate-based, ferrous sulphate). Aerate compacted areas with hollow-tine aerator. Overseed bare patches and worn areas. October: continue mowing as growth slows. Raise cut height (40-50mm). Feed with an autumn lawn feed (higher potassium, lower nitrogen) to strengthen roots against winter frost rather than encourage top growth. November: final mow of the season once growth stops, clear fallen leaves regularly to prevent smothering and moss growth, and put the mower away for winter storage.
What should I know about Winter (December-February)?
Winter rest period for grass. Activities: avoid walking on frosty or waterlogged lawn — damages grass structure. Repair mower, sharpen blades for spring. Plan repairs for following spring. Service garden equipment. January: order grass seed and fertiliser for upcoming season. February (end of month): if mild, start considering spring feed for early March. Lift mower from shed, ensure sharp blade. Look for signs of moss, weeds requiring spring treatment. Important: a sharp mower blade is one of the cheapest and most effective things you can do for lawn health — a blunt blade tears grass rather than cutting it cleanly, leaving ragged, brown-tipped tips that are more vulnerable to disease. Get blades sharpened or replaced every winter before the mowing season starts, and avoid walking on frozen or waterlogged grass, which compacts the soil and damages the turf structure underneath.