
Late Season Treatment
Strengthen your grass with an iron-based micronutrient spray, which also helps to contain moss in your lawn during the wetter, milder autumn months
What is the Late Season Treatment?
An essential Late Season Treatment is applied from October to December, as differing conditions take hold. The mild, wet weather experienced during this period brings with it a rapid encroachment of moss in lawns, particularly in shady, damp areas. This treatment is an iron-based micronutrient spray that treats moss whilst also strengthening the grass plant in the process. The iron sulphate dehydrates the moss, inhibiting its ability to reproduce, with visible effects less than an hour after application as the moss begins to darken in colour.
The Late Season Treatment is included in these packages
Included in all of our lawn care packages:


How does our Late Season Treatment work?
The autumn climate will slow grass growth right down, so the specialised feed included in this application is designed to strengthen and harden the grass plant for winter conditions rather than encourage foliar growth. The feed formula also makes the turf less susceptible to disease.
It also maintains a lush green colour in the lawn as the iron in the formula stimulates chlorophyll production in the plant. Iron also plays a key role in reactions involving photosynthesis, nitrogen utilisation and root growth - all of which are vital in maintaining a healthy plant structure.
Late Season Treatment formula comprises:
- Iron sulphate to dehydrate and blacken moss and to improve grass colour
- Iron is a micro-nutrient that helps to harden and strengthen the grass plant, making it less susceptible to disease and damage during harsh seasonal conditions.
Summary
When? October - December is the ideal time for our Late Season Treatment.
What? Iron-based micro-nutrient spray.
Why? To dehydrate and darken moss, strengthen the grass plant against harsh winter weather, strengthen root structure and improve colour.
Lawn Care Services
Achieve a lush, green, and healthy lawn all year round with our expert lawn care services. Whether you need lawn aeration, scarification, weed treatment, or seasonal lawn treatments, we provide tailored solutions to enhance the health and appearance of your grass.

Lawn Aeration
Aeration is a key factor in keeping lawns healthy and green, as, like us, your lawn and the soil beneath it needs to breathe.
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Lawn Maintainer
Our lightest renovation package that is tailored to lawns that are already in great condition and only need light scarification and aeration, to help for a stronger, healthier lawn.
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Lawn Improver
This renovation service is for lawns that are struggling with a moss and thatch build-up. A routine lawn scarification service that we recommend customers have every 1-3 years depending on the conditions of their lawn.
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Total Reseed
This complete moss and thatch removal renovation service is our affordable alternative to re-turfing. It is ideal for lawns that are battling thick thatch and heavy moss growth.
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Soil Improver Programme
Start boosting the quality of your soil any time of the year with our Soil Improver Programme
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Borders and Beds Fertilisation Programme
Help your shrubs and flowers to thrive with our Borders and Beds Fertilisation Programme
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Water Conserver Treatment
The Water Conserver Treatment is a granular application that increases your lawn's ability to absorb and retain moisture.
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Red Thread Treatment
Our Red Thread Treatment is specially designed to aid the lawn in a quick recovery following a bout of Red Thread fungal disease.
Learn MoreLawn Care Packages
No matter your lawn’s condition or your level of experience with lawn maintenance, we’ve got the perfect package to suit your needs. Our professional lawn care packages offer year-round treatments to keep your grass green and healthy.

Basic Package
Our Basic Package provides the essentials for those who are new to lawn care. This package includes our Annual Lawn Care Programme consisting of fertiliser applications, water conserver application, weed treatment applications and moss treatments that are seasonally tailored to your lawn's needs.
What's included
- •Season Starter Lawn Care Treatment
- •Early Season Lawn Care Treatment
- •Water Conserver Treatment
- •Mid-Season Lawn Care Treatment
- •Late Season Lawn Care Treatment
- •End-of-Season Lawn Care Treatment

Standard Package
Get everything that's included in our Basic Package, but with an additional lawn aeration. This is a lawn care package that will help to ensure that your lawn gets the most from our treatments.
What's included
- •Season Starter Lawn Care Treatment
- •Early Season Lawn Care Treatment
- •Water Conserver Treatment
- •Mid-Season Lawn Care Treatment
- •Late Season Lawn Care Treatment
- •End-of-Season Lawn Care Treatment
Plus
- •Lawn Aeration

Enhanced Package
Our Enhanced Packages are designed for lawns that are struggling with moss and thatch. This package can be tailored based on the level of scarification your lawn requires to remove moss and thatch and get it thriving again. This also includes all the treatments found in our Basic Package.
What's included
- •Season Starter Lawn Care Treatment
- •Early Season Lawn Care Treatment
- •Water Conserver Treatment
- •Mid-Season Lawn Care Treatment
- •Late Season Lawn Care Treatment
- •End-of-Season Lawn Care Treatment
Plus one of the following
- •Lawn Maintainer Renovation Service
- •Lawn Improver Renovation Service
- •Total Reseed Renovation Service
Why TopGrass
Top Quality
TopGrass staff use professional lawn care products and equipment to obtain the best results.
Top Value
Our lawn care packages start from as little as £13.54 per month including labour, materials and VAT. It can be cheaper than DIY!
Top Expertise
Beautiful lush, green grass enhances the appearance of your property and can increase its value.
Top Appearance
Beautiful lush, green grass enhances the appearance of your property and can increase its value.
Top Value
Letting us do the work for you will save you days of your own precious time and allow you more time to enjoy your garden.
Top Flexibility
Free lawn treatment quotation with no obligation. We will tell you what your lawn needs to improve it. There is no hard sell, no contract to sign.

What our customers say about us
FAQ's
During this period, mild and wet weather encourages moss growth, especially in shady or damp areas. The Late Season Treatment helps dehydrate moss, reduce its spread, and fortify the lawn against cold-weather stress.
It helps to suppress moss growth and stop it from spreading, but it will not prevent your lawn from having moss in the future. Ongoing lawn care—including scarification, aeration and proper drainage—will be needed to prevent long-term moss issues.
The treatment contains iron sulphate, which dehydrates moss and inhibits its growth. You’ll see visible effects within an hour, as the moss begins to blacken.
The cost of our Late Season Treatment is based on your lawn’s size, with plans starting from just £13.54 per month. Want to know your exact price? Click here to get your free personalised quote today!
Yes, the treatment is safe. We just ask for children and pets to be kept off the lawn for a set time after each application so as not to affect the results of the service - typically for 24 hours after the application. After that, normal use of the lawn can resume without concern.