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 £73.20 £61.00

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/Winterprovides your lawn with the ultimate protection from winter disease and frost. High levels of potassium 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

I've just over seeded an established lawn (Oct 6 after using the Lawn, Moss and Weedkiller 2 weeks prior to. You advise not to use this for 4-6 weeks after over seeding, which takes me until end it then too late to apply this fertiliser and I'd be better waiting until Spring and fertilising then?

Question by: anthony on 7 Oct 2020, 16:48
Hi Anthony

Absolutely apply this product at the end of November, this will provide protection during some of the coldest months (December & January) and will last right into the Spring. It is best to protect the new lawn as much as you can.

Thanks Roisin
Answer by: Roisin McCann on 7 Oct 2020, 16:54
I have the slow realese fertilizer how long after cutting lawn should I wait to.apply ? And should that be the last cut ? Or can I cut again once fertilizer is down?
Many thanks
Question by: Estelle Gilbert on 9 Oct 2020, 11:59
Hi Estelle, you can apply straight away just ensure that the fertiliser is watered well and fully dissolved. You might not need to cut it again until the spring as growth tends to start slowing down, however if you feel that it needs it then feel free.

Answer by: Roisin McCann on 9 Oct 2020, 13:25
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
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 have a fairly small lawn, about 50m2. How long will your slow release autumn fertiliser be ok to store for, in a dry shed. Thanks
Question by: Martin Lusk on 10 Oct 2020, 10:21
Thank you for your enquiry. Our fertiliser will keep for up to four years if stored in a cool dry place.

Thanks Roisin
Answer by: Roisin McCann on 12 Oct 2020, 10:04
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
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
How soon after mowing can I use the autumn slow release fertiliser and can I use when grass is a bit damp as it nearly always is this time of year
Question by: tarot shonk on 19 Oct 2020, 15:01
The fertiliser can be applied straight after application, or at least when the cuttings are removed. This is a granular fertiliser and must be watered well until fully dissolved.

Answer by: Roisin McCann on 19 Oct 2020, 16:02
I have laid a new turf lawn 3 months ago with organic fertilizer underneath. Very sadly has developed red thread in the last month following a lot of rain. I treated it with provanto 1 week ago. I read that high nitrogen fertilizer is the other good source to help the grass. Would you recommend your slow or fast release winter fertilizer in this situation - or something else? Thank you
Question by: James on 19 Oct 2020, 22:28
Hi James

You are quite right, a fertiliser rich in nitrogen will help with your red thread issue and help keep it at bay. However our winter fertilisers are not as high in nitrogen as our Spring/Summer fertilisers. In winter the focus is on the potassium and phosphate rather that nitrogen. An application of our QUICK RELEASE Spring Summer, will give the lawn an intense nitrogen feed and will continue to work over a period of six weeks.
Answer by: Roisin McCann on 20 Oct 2020, 11:01
Hi my lawn is around 7 weeks old and is this product ok to use now? And what’s the latest time I can apply this? And will it help with grass that is slightly yellowing? Thanks
Question by: Lee on 21 Oct 2020, 17:52
Hi Lee

This can be applied to newly established lawns, this normally takes 6-9 weeks after sowing depending on conditions, however if you feel that your garden is not quite there then I would leave it a few weeks. The feed can last up to 16 weeks so ideally we recommend this can be applied up until the end of October. This should take you up to spring. This will help nourish the soil and have improve the overall colour of the grass.
Answer by: Roisin McCann on 22 Oct 2020, 11:11

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