How To Care for Your Lawn After Heavy Rain

Rain is good for turf, right?

Regular rain can do wonders for our gardens, especially our lawns, but consistent downpours can cause serious problems and affect your lawn’s health, resilience, and appearance.

This article highlights the common lawn issues caused by heavy rain, but most importantly, it discusses how to resolve them, bringing your lawn back to life and making it look as good as new.

Content Overview

• How does heavy rain affect your lawn?
• Quick fixes for waterlogged lawns
• How to repair a damaged lawn after heavy rain
• General lawn care tips after heavy rain
• Preparing your lawn for heavy rainfall
• Speak to the experts
• FAQs

How does heavy rain affect your lawn?

Whether it’s April showers or an unexpected downpour, too much rain can cause numerous problems for our turf.

Here are six of the most common lawn issues due to rain:

• Suffocation – Pools of water on your lawn’s surface can prevent oxygen, sunlight, and nutrients from reaching the grass roots, ultimately suffocating and killing them.
• Dead roots – Too much water can block the vital gaps in the soil. This leads to soil compaction, which stops the air supply from reaching the roots – halting their growth or, in the worst case, killing them.
• Discolouration – This is a sign of water stress, and your grass is screaming for help! You’ll most likely spot yellow or brown patches where your grass is suffocating and struggling to access nutrients.
• Weakened grass – Heavy and consistent rainfall can dislodge and dilute your soil, removing essential nutrients. This can result in thinning and frail grass that struggles to grow and looks unhealthy.
• Fungus – Sodden soil or water pooling can become a breeding ground for lawn fungus. As excess water rots your grass roots, fungus thrives, destroying your grass or turning it a nasty yellow colour.
• Weed growth – When rainfall damages healthy grass, it makes room for weeds to take over. Weeds are incredibly resilient; even torrential rain won’t kill them off!

Read More: How to Prevent My Lawn from Being Waterlogged

Quick Fixes for Water-Damaged Lawns

Your main goal is to put preventative measures in place to protect your lawn from future downpours. We’ll cover this further in the article, but for now, here’s how you can help your lawn immediately after heavy rainfall.

• Avoid walking on saturated soil – This can cause further damage, breaking already weakened grass. You’ll also leave deep footprints across your lawn, creating an uneven surface and giving water more opportunities to pool.
• Clear large debris – Heavy rainfall often comes with strong winds, which can leave broken branches or fallen hedges across your lawn. Clear these straight away to let healing sunlight reach your lawn.
• Rake up smaller debris – Fallen leaves should also be cleared off your lawn. If left, they can create microclimates for fungi to thrive and prevent sunlight and oxygen from reaching your grass and roots.
• Never mow – It seems obvious, but avoid mowing your lawn after lots of rain. Your soil will be extremely soft, and your mower will churn up your soil and grass, causing further damage. Wait until the ground has dried, and make sure your first cut is on a higher setting.

How to Repair a Damaged Lawn After Heavy Rain

First, you need to understand what you’re dealing with.

Once the rain has stopped, walk around your lawn and look for the four most common signs of lawn damage listed below, and how you can repair them.

Pooled Water

Pools of water will appear in low dips or divots where water collects. If drainage is poor, water will sit on the surface. This can cause root rot and prevent oxygen from reaching the roots if left unaddressed.

The Fix: Use a garden fork to poke holes deep into the soil. This helps break up compacted soil and creates channels for water to drain. You should also apply topsoil and grass seed to level out these areas, preventing water from collecting in the future.

Waterlogged Lawns

Waterlogged lawns are the extreme version of water pooling. Water pools on the surface and eventually soaks through.

Waterlogging indicates the soil beneath is saturated, and you can tell by its soft, sticky texture. This can be due to soil compaction, poor drainage or both.

The Fix: Aeration can often resolve a waterlogged lawn, but in severe cases, you may need to dig a ditch at the edge of your lawn to help water drain away.

For more top tips on waterlogged lawns, read our blog on preventing your lawn from being waterlogged.

Soil Erosion

This is a common problem for sloped gardens, as rain can dislodge soil and damage your turf. This can create areas of exposed soil, and you may also notice piles of soil across your lawn where it has collected.

Exposed soil is at risk of weed invasion, while soil piles prevent oxygen and sunlight from reaching your healthy turf.

The Fix: Remove large piles of soil or rake over smaller piles, making sure the grass blades are coming through. For bald patches, sow grass seed and fertilise the area to repair and encourage growth.

Grass Discolouration

If you notice yellow or pale green patches across your lawn, this may indicate water stress. This happens when roots are saturated or damaged and don’t get the nutrients they need.

The Fix: Depending on the time of year, use a spring/summer or autumn/winter fertiliser to give your lawn a much-needed injection of goodness.

Fertiliser will strengthen your grass over the winter months, encouraging healthy growth and vibrant colours in the spring.

Read More: Can Turf be Laid in the Rain?

General Lawn Care Tips After Heavy Rain

If your lawn has survived the latest storm, that’s great! This means the lawn was laid correctly and has a robust root system to support healthy grass.

However, it always helps to give it a helping hand, especially after such severe weather. Once the ground is fully dry, take some time to complete these post-rain lawn care tasks to boost your grass.

• Aerate – Using a garden fork, spike holes down into your soil. Do this across your lawn, focusing on areas that particularly struggled. Aerating breaks up any compacted soil, creating more holes for oxygen to flow and water to drain.
• Fertilise – This is a great opportunity to add some extra goodness to your lawn, as many key nutrients will have been diluted with the rain. Depending on the time of year, use an autumn/winter or spring/summer fertiliser to restore your grass’s strength and encourage healthy growth.
• Spot treatment – If you notice particular areas of your lawn struggling with the rain, prioritise these. Seeding these areas can encourage grass growth and fill in any bare patches where grass may have died.
• Weed – As we mentioned, heavy rain is no problem for weeds. In fact, they love it! You will probably notice an invasion of weeds after rainfall. Don’t let them get carried away and start weeding as soon as possible. If there are bald patches, add grass seed, reducing the available space for weeds to grow.

Preparing Your Lawn For Future Rainfall

The good news is that there are lots of things you can do to protect your lawn from future rainfall. If you live in the UK, this is probably a good idea!

Here are our top tips to get your lawn ready for heavy showers:

• Take note of areas that were impacted before
• Use topsoil to level areas where water previously pooled
• Install additional drainage where possible
• Aerate your lawn to enhance drainage into your soil
• Invest in a water butt – think of how much water you’ll collect and can reuse in the summer!

Read More: How Does Rain Affect the Laying of Turf

Speak to the Experts

For any more queries on maintaining and caring for your turf, no matter the weather, get in touch with our friendly customer service team.

FAQs About Lawn Care After Heavy Rain

How to fix a waterlogged lawn?

To fix a waterlogged lawn, wait until conditions are drier and aerate your lawn. You can also top dress your lawn to improve underlying drainage.

Will my lawn recover after heavy rain?

Well-established lawns will recover after heavy rainfall. Dead or stressed lawns may struggle, but lawn care such as aeration, topdressing and fertilising can help restore it.

Will my waterlogged lawn return to normal?

Yes, a waterlogged lawn will return to normal as the water drains away relatively quickly. Prolonged waterlogging can cause issues which can be repaired. If repeated waterlogging occurs, it may be a sign that you need a new lawn.

How do I improve drainage in my lawn?

You can improve drainage in your lawn through aeration, topdressing or replacing stressed turf with new turf. Effective lawn drainage starts with correct ground preparation when installing turf.

Should I mow my lawn after heavy rain?

Avoid mowing your lawn after heavy rain, as it can damage the grass and churn up your turf. Wait until standing water has disappeared and the soil is firm underfoot.