KissMyGrass Slow Release Lawn Fertiliser 20.6.8 (3 month)
KissMyGrass Slow Release Lawn Fertiliser is a long-lasting granular lawn feed designed to provide consistent nutrition for healthy grass growth over a three-month period. Formulated from a blend of three different granules, it delivers a phased release of nutrients to help keep your lawn well-fed throughout the season, reducing the need for frequent applications. Ideal for established lawns, this slow release lawn fertiliser promotes steady growth, strong roots and a healthier lawn from spring through to autumn.
- Slow release lawn fertiliser with nutrients released over up to three months
- Contains coated granules that degrade at different rates for phased feeding
- Provides long-lasting nutrition to support healthy grass growth
- Apply from March to October
- NPK analysis 20.6.8
- 20% Nitrogen (N) – the highest proportion in the formula, helping to support strong grass growth and maintain a healthy green lawn.
- 6% Phosphorus (P) – supports root development, helping grass establish and make efficient use of available nutrients.
- 8% Potassium (K) – helps strengthen grass and improve resilience to everyday stresses such as wear, dry conditions and changing weather.
- Apply at 35g per m²
- 20kg covers up to 575m²
- For maximum effect and to improve nutrient uptake from granular fertilisers, apply liquid seaweed every 2-3 weeks to improve soil biology and structure over time
- For accurate and easy application Boston Seeds recommends using a spreader
What is Slow Release Lawn Fertiliser?
KissMyGrass Slow Release Lawn Fertiliser is a granular lawn feed designed to provide a steady supply of nutrients over a three-month period.
Its blend of coated granules releases nutrients at different rates, helping to maintain healthy growth and a consistently well-fed lawn with fewer applications.
Why choose a slow release lawn feed instead of a standard lawn fertiliser?
Unlike standard lawn fertilisers that can release nutrients quite quickly, KissMyGrass Slow Release Lawn Fertiliser delivers nutrients gradually over time. This helps provide more consistent feeding, making it a convenient choice for homeowners looking for long-lasting lawn care with less effort.
When should I apply Slow Release Lawn Fertiliser?
Apply KissMyGrass Slow Release Lawn Fertiliser from March to October, when grass is actively growing. Applying during the growing season allows the lawn to make the most of the nutrients, supporting healthy growth and maintaining lawn condition over the months ahead.
How much Slow Release Lawn Fertiliser should I use?
Apply at 35g per square metre
20kg covers approximately 575m²
Applying at the recommended rate helps ensure even coverage and effective long-term feeding.
What nutrients are contained in KissMyGrass Slow Release Lawn Fertiliser?
KissMyGrass Slow Release Lawn Fertiliser contains an NPK ratio of 20.6.8:
- 20% Nitrogen (N) – the highest proportion in the formula, helping to support strong grass growth and maintain a healthy green lawn.
- 6% Phosphorus (P) – supports root development, helping grass establish and make efficient use of available nutrients.
- 8% Potassium (K) – helps strengthen grass and improve resilience to everyday stresses such as wear, dry conditions and changing weather.
The 20.6.8 formulation is designed specifically for established lawns, providing a balance of growth, root support and resilience over the three-month feeding period.
Is KissMyGrass Slow Release Lawn Fertiliser suitable for all lawns?
KissMyGrass Slow Release Lawn Fertiliser is suitable for most established lawns that would benefit from regular feeding and long-lasting nutrition throughout the growing season.
What makes Slow Release Lawn Fertiliser different from other lawn feeds?
KissMyGrass Slow Release Lawn Fertiliser uses a blend of coated granules that release nutrients at different rates. This phased-release approach helps provide consistent feeding for up to three months, making it an effective long-lasting lawn fertiliser for maintaining healthy grass growth.
Delivery Information
We’re proud to offer fast and reliable delivery. Please check the delivery label on each product page for specific delivery timeframes.
Items Marked as Next Day Delivery
- Orders placed before 2pm (Mon–Fri) will be dispatched the same working day with delivery the next working day
- Orders placed after 2pm are dispatched the next working day
- Orders placed after 2pm Friday are dispatched on Monday for Tuesday delivery (excluding Bank Holidays)
- Orders for Saturday delivery must be placed by 2pm Friday
Delivery Combinations
If your order contains a combination of next day and non-next day products, please note only the products marked next day will be delivered next day. The remainder of your order will be delivered within the timescales indicated.
Orders are sent via DHL, DPD, DX, Evri and Royal Mail, plus pallet networks for orders of approximately 100kg+.
| Delivery location | Excl. VAT | Incl. VAT |
| UK inc. Islands & Channel Islands up to 2kg (seed only) | £3.33 | £3.99 |
| Standard UK Mainland Delivery | £4.99 | £5.99 |
| Saturday (England & Wales) up to 30kg* (Orders must be placed by 2pm Friday) | £12.50 | £15.00 |
| Scottish Highlands and Islands up to 30kg* | £14.00 | £16.80 |
| Isle of Man, Isles of Scilly up to 30kg* | £17.00 | £20.40 |
| Channel Islands up to 30kg* | £12.00 | £14.40 |
*please enquire for orders over 30kg to these locations.
Collections
Customers are welcome to purchase items marked as next day delivery in person from our office and distribution centre at:
Manor Road
Kirton
Boston
PE20 1PH
Additional Information
- Orders over 100kg will normally be delivered on a pallet unless specified otherwise.
- Standard delivery takes place between the hours of 8am and 6pm, Monday to Friday.
- Orders containing multiple items may be delivered separately via multiple couriers.
- Unfortunately, we are unable to deliver to Northern Ireland or Europe.
***Please Note
Dates and indications for delivery are approximate and we cannot guarantee or be held responsible for delays in delivery dates or times. We do not refund delivery charges for delayed deliveries.
Please order from us with enough lead-time to prevent any loss or disappointment resulting from the delivery date or time. Under no circumstance will we be held responsible for any loss or damage incurred through delay in order fulfilment.
Please check that you have entered the correct delivery address before completing your order as we are unable to change it once processed.
CONTACT US
For any queries relating to your order, please contact [email protected]
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- Contains iron to kill moss and give the grass a dark green finish
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- Apply from March to October
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- Contains: Magnesium oxide, Iron, Manganese, Zinc, Molybdenum, Copper, Boron
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Buy With Confidence
We’re dedicated to making the highest quality, professional outdoor products available to everyone to truly make the most of their outdoor spaces - lawns, gardens, landscapes, equine, sports and agriculture. Trusted by over 200,000 happy customers with a reputation for professional quality, world-class service and outstanding value for everyone, since 2002.
We take quality seriously, supplying products you can trust. Our grass seed is DEFRA-certified for purity and germination, utilising the highest quality cultivars recommended by the Sports Turf Research Institute. Wildflower products are of known UK provenance and flower bulbs are sourced directly from the finest growers in the UK and the Netherlands.
With hundreds of items available for next day delivery, we take pride in getting your order to you quickly and efficiently. Our team of dedicated experts and friendly advisors are here for you when you need them. That’s why you can call us and get straight through to an advisor from 9am-5pm, Monday to Friday, or email us for a rapid response.