SLOW RELEASE: Autumn / Winter Fertiliser

  • 4-month premium protection
  • A steady feed for your lawn throughout winter
  • Helps to fight winter disease and frost in one application
From £40.25 £33.54

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How much do I need?

Simply enter the length and width of the area, to calculate how much you need.


Product Description

Slow Release: Autumn/Winter provides your lawn with the ultimate protection from winter disease and frost. High levels of potassium in this fertiliser help to harden your grass against extreme cold weather conditions and preserves your lawns appearance until spring / summer. One application offers 4 months coverage during your lawn’s harshest months, resulting in a hardy and healthy sward come the following summer. 

This fertiliser carries minimal risk of scorching your grass blades, however, remember to water it off or apply just before the rain is due. For more information on all things fertiliser, read our Fertiliser FAQs.

Mixture Breakdown

NPK 8.0.6
1.0% Magnesium
2.0% Iron (fe)

Usage Guide

Apply our fertiliser at the recommended rate by hand when wearing a glove or by using a spreader
Water the fertiliser in until it dissolves
Keep kids and pets away from the lawn during application and until the granules dissolve
Remove / water off any footwear you were wearing during the application of the fertiliser to avoid any risk of damage to newly laid patios / stone flag flooring

Not watering your fertiliser in can potentially scorch existing grass or delay the benefits of the fertiliser.If after watering the fertiliser does not disappear and dissolve off the surface, water until you cannot see the granules.

You can apply this fertiliser from August to October. For a more instant effect going into winter, you may wish to consider our QUICK RELEASE: Autumn / Winter fertiliser.

Use August to October
Spreading Rate 35 grams per m2
Watering This fertiliser MUST be watered in - granules should not be visible after application if watered in sufficiently.


If you are planning to overseed or sow a new lawn from scratch, you can do so once the fertiliser granules have dissolved

For more information on all things fertiliser, read our Fertiliser FAQs.

Product Questions

Product Questions

Do I have to wait a few days after mowing before spreading this or can it be done straight after mowing? Do I then have to wait before my next mow after application? Thanks.
Question by: Peter Ward on 10 Oct 2023, 15:17
We would recommend waiting two or three days after mowing before fertilising and your not required to wait any length of time between fertilising and your next mow.
Answer by: Roisin McCann (Admin) on 10 Oct 2023, 15:37
Is the slow release fertiliser safe for pets?
Question by: Tim on 23 Sept 2023, 13:41
All of our lawn food products contain chemicals. Keep children and pets off the lawn during application and until the granules dissolve. If your pet uses the lawn as a bathroom then supervise them when they are doing this. Once the granules are dissolved, it is safe to let children and pets back on the lawn.
Answer by: Roisin McCann (Admin) on 25 Sept 2023, 15:05
Hi - I have just overseeded my lawn early Oct as it had taken quite a battering from the summer drought. I know I have to wait 4-6 weeks (or maybe slightly longer) which takes me well into November before I can apply this product. Some of your answers are slightly contradictory. E.g R says it can be applied right until end November, but in another response she says until the end of October. Is it basically flexible, and how late into winter can this be applied? Many thanks for clarifying.
Question by: Pete on 9 Oct 2022, 09:55
Hi Pete, it really depends on the temperatures and that can vary from year to year.
Ideally, you want to get it down before the ground freezes, after that there isn't much point.
Answer by: Roisin McCann on 10 Oct 2022, 14:24
I recently purchased a bag of this, but realise I only need a small amount for the size of my lawn, so my question is how long will this keep as I think I have about 10 years worth, lol.
Question by: Catriona Wood on 1 Oct 2022, 13:02
Hi Catriona, our fertiliser will keep for up to four years if stored in a cool dry place.
Answer by: Roisin McCann on 3 Oct 2022, 11:07
Obviously after the hot weather the lawn is very bare, even after using your seed and summer fertiliser. Just ordered the slow release winter fertiliser, do I need to use a scarifier before
fertilising for the winter?
Thank you
Question by: Alfred Smith on 15 Sept 2022, 16:53
Hi Alfred

Thanks for your question.

Not every lawn needs to be scarified, however if you think your lawn would benefit from this, it is fine to do so. It is best to scarify before applying the fertiliser. As this is a granular fertiliser, it needs to be watered after application to ensure it dissolves.
Answer by: Colm Hicks on 16 Sept 2022, 08:53
I seeded a new lawn using your seed mixture for sandy soil in September of this year. It has grown well, never been cut. Can i use your slow release autumn/ winter fertiliser? This winter as it is still a young grass.
Question by: Michael Larkin on 9 Nov 2021, 09:48
Hi Michel, you can apply the Autumn/Winter fertiliser througout November if temperaturesa are mild enough and if the ground hasn't frozen
Answer by: Roisin McCann on 22 Nov 2021, 14:53
Hello, I had new turf laid in middle of September it has knitted well and I wanted to ensure I protect it in the winter. Reading your reviews most Autumn/winter fertilisers say Aug-October. Is there something you would receive after this time (it’s nearly November) also what would you recommend for new lawns? Thank you for your help
Question by: Lynne on 27 Oct 2021, 06:58
Hi Lynne, there is still some time to apply the Autumn/Winter fertilisers, ideally you want to get it down before the frosts set in and temperatures so far this season have been quite mild. It can be used on your new lawn to help provide the ultimate protection during the colder months. It gives four months of continuous feed, and although it is less intensive than a quick release it is a more balanced feed. This will take you through to the Spring when you would then consider our Spring/Summer range. This is a granular product and will need watering until fully dissolved.
Answer by: Roisin McCann on 27 Oct 2021, 15:24

Could this be used at the start of August and then again used at the end of November taking it up to April, where I would them put down the slow release spring/summer fertiliser?

Question by: Daniel on 22 Oct 2021, 06:52
Hi, depending on temperatures August it is usually a little early but that is not to say it can't be applied. Normally we would say around September/October taking you into early Spring where you could then apply the SLOW RELEASE: Spring Summer Fertiliser.
Answer by: Roisin McCann on 22 Oct 2021, 08:49
I applied quick release pre seed fertiliser before overseeding my lawn last month. I’ve since seeded and the lawn looks great.

However should I apply a slow release fertiliser like the autumn/winter fertiliser during the winter months or would the pressed that was applied in September be ok?

Btw I also have around 7kg left of the pre-seed fertiliser left. Can this only be applied pre-seeding or can it applied when not pre-seeding?
Question by: Dipal on 13 Oct 2021, 13:43
Hi, we would recommend waiting until the lawn is fully established before applying another fertiliser. This can take up to 8 weeks. If there is still time after the 8 weeks then we would recommend applying the SLOW RELEASE: Autumn/Winter Fertiliser. It will harden the new lawn and provide the ultimate protection during the colder months. It gives four months of continuous feed, and although it is less intensive than a quick release it is a more balanced feed. This will take you through to the Spring. The Pre Seed fertiliser can be reapplied in the Spring to give the garden boost after the colder weather, it is rich in nitrogen so will help improve the appearance and colour of the grass. Also, our fertiliser will keep for up to four years if stored in a cool dry place.
Answer by: Roisin McCann on 13 Oct 2021, 14:17
How many bags of slow release autumn/winter fertilizer would i need for a green 40m x 40m please
Question by: Robert Helps on 11 Oct 2021, 11:39
Hi, for an area that size you would require 56kg (3x20kg bags)
Answer by: Roisin McCann on 12 Oct 2021, 15:32

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