3 Lawn Fertiliser Mistakes Everyone Makes
The three lawn fertiliser mistakes almost everyone makes are applying too much and scorching the grass, spreading unevenly by throwing feed by hand, and feeding at the wrong time of year. Stick to the rate on the pack, use a spreader for even coverage, and match the feed to the season, and you avoid nearly every common lawn feeding mistake.
Feeding is the single biggest lever you have for a thick, green lawn, but it is also the one job where small slip-ups show up fastest. A heavy hand, a rushed spread or the wrong feed for the time of year can leave you with stripes, scorch or wasted money. Here are the three lawn fertiliser mistakes we see again and again, and the simple fix for each.
Mistake 1: Applying too much fertiliser and scorching the lawn
More feed does not mean a greener lawn; it means a burnt one. Lay granular feed too heavily and the concentrated salts pull moisture out of the grass, leaving yellow or brown scorch marks that can take weeks to grow out. It is the most common lawn fertiliser mistake of all, and the easiest to avoid: measure your lawn, set the rate on the pack, and never tip extra on "to be safe". A slow-release granular feed makes this far more forgiving, because it releases nutrients gradually rather than hitting the grass with everything at once. In summer especially, reach for a no-scorch feed and water it in if rain is not forecast.
Mistake 2: Spreading unevenly by hand instead of using a spreader
Throwing handfuls of feed across the lawn feels quick, but it almost never lands evenly. You end up with dark green stripes where the feed piled up and pale, hungry patches where it missed, and the heavy spots are exactly where scorch starts. The fix is a spreader. A handheld or wheeled spreader lays the prills at a steady, even rate so every part of the lawn gets the same dose.
How to spread lawn feed evenly
Set the spreader to the rate on the pack, then work the lawn in slightly overlapping passes, ideally in two directions at half the rate each way, so any gaps in the first pass are covered by the second. Keep walking at a steady pace and shut the hopper off at the end of each run so you do not dump feed on the turns. Water the feed in afterwards if no rain is due. Even coverage is the difference between a uniform green lawn and a patchy one.
Mistake 3: Feeding at the wrong time of year
The third mistake is using the wrong feed for the season, or feeding when the lawn cannot use it. Grass needs different nutrients at different times: a nitrogen-led feed in spring and summer drives growth and colour, while a potassium-led feed in autumn hardens the grass for winter. Pile high-nitrogen feed on in late autumn and you force soft growth that disease loves; feed a dormant or drought-stressed lawn and most of it is simply wasted. Match the feed to the season and the rest takes care of itself. The easiest way to never get the timing wrong is a seasonal feed plan, which sends the right feed when your lawn actually needs it.
MyLawn is Mowd's free DIY lawn-care app. It looks at your postcode's weather, the season and what you have already done, then tells you the single best next thing to do, in plain English, with reminders so a feed never gets forgotten or mistimed. Take a look at MyLawn.
More common errors to avoid: Lawn Fertiliser Mistakes: Avoid These Common Errors. Related Mowd guides: UK Lawn Feeding Calendar · Liquid vs Granular Lawn Fertiliser · What Happens If You Don't Feed Your Lawn?
Frequently asked questions
What is the most common lawn fertiliser mistake?
- Applying too much. Over-applying granular feed scorches the grass with yellow or brown marks that take weeks to recover. Always measure the lawn, follow the rate on the pack, and never add extra to be safe.
Can you put too much fertiliser on your lawn?
- Yes. Too much feed, especially in hot, dry weather, draws moisture out of the grass and burns it. Stick to the recommended rate, spread it evenly, and water it in if rain is not forecast to lower the risk of scorch.
Do I need a spreader to apply lawn feed?
- It is strongly recommended. A spreader lays granular feed at an even rate, so you avoid the stripes, patches and scorch spots that come from throwing feed by hand. Work in slightly overlapping passes for the most uniform coverage.
When should you not fertilise your lawn?
- Avoid feeding a dormant, frozen or drought-stressed lawn, as the grass cannot take the nutrients up and the feed is wasted. Also avoid high-nitrogen feeds in late autumn and winter, which force soft, disease-prone growth.