Lawn Feed & Lawn Fertiliser
The KissMyGrass lawn feed range, available exclusively from Boston Seeds, is expertly formulated using the highest-quality ingredients to provide your lawn and grassland with all of the nutrients it needs for healthy, green and resilient swards.
Order today to transform your lawn's appearance and durability, ready for all the family to enjoy. Professional quality feeds and fertilisers, available to buy direct for next day delivery.
Don't hesitate to get in touch to speak to one of our experts or request a catalogue to view our full range. Ordering regularly or looking for large volumes? Click here to apply for a trade account today - we review all applications within one working day.
- Helps strengthen lawns for colder, wetter conditions
- Doesn't encourage excessive growth during winter
KissMyGrass Autumn & Winter Lawn Fertiliser is a specialist autumn and winter lawn feed formulated to strengthen and support lawns through the colder months. With a lower nitrogen and higher potassium content, it helps maintain a healthy lawn without encouraging excessive growth, while added iron and magnesium help promote a rich green colour. Nutrients are released over a 6-8 week period to help keep lawns in excellent condition throughout autumn and winter.
- Helps strengthen lawns for colder, wetter conditions
- Doesn't encourage excessive growth during winter
- Added iron and magnesium for a deep green lawn colour
- Nutrients released gradually over 6-8 weeks
- Apply from September to February
- Contains NPK 6.5.10 + 2% Fe + 1% Mg
- Apply at 35g/m². 20kg covers up to 575m²
This product is formulated for established lawns. If sowing new grass seed, wait 7-14 days after watering in the fertiliser.
Winter Defender Liquid Lawn Fertiliser is the perfect solution for hardening your lawn during the cooler winter months, without promoting growth. Trace elements promote all-round plant health - the essential 'multivitamin' for your winter lawn!
- Full trace element package
- Apply from October-February
- For best results, apply every 2-3 weeks
- Contains: Magnesium oxide, Iron, Manganese, Zinc, Molybdenum, Copper, Boron
- 1 litre covers 200sqm
This fast and effective lawn treatment provides an additional boost heading into the cooler months, helping to condition grass and strengthen roots to enhance nutrient uptake.
- Helps protect the lawn through cooler, winter months
- Apply from August to November
- For best results, apply every 2-3 weeks during autumn and winter
- Contains NPK at a ratio of 4.0.10 + 1% MgO
- 1 litre covers 200sqm
- For accurate and easy application Boston Seeds recommends using a Liquid Fertiliser Sprayer
Our Winter Lawn Protection Kit is the best option for enhancing your lawn during the winter to protect it over the cooler months. The carefully formulated liquid and granular fertilisers ensure your lawn has the correct nutrients without encouraging leaf growth.
This winter lawn protection kit Includes:
- Autumn & Winter Granular Fertiliser - carefully formulated to help protect your lawn
- Liquid Seaweed - promotes healthier grass and strengthens roots
- Liquid Iron - strengthens the grass without extra growth and aids stress recovery
- Autumn & Winter Vitality Liquid Fertiliser - condition the plant and strengthens roots to enhance nutrient uptake
- Winter Defender Liquid Fertiliser - to add trace elements to your lawn to promote all-round plant health
Specially formulated to improve establishment of grass seed by ensuring all of the essential nutrients for germination are available in the soil. Encourages root and shoot development to promote quicker coverage.
- Incorporate this fertiliser into the soil as part of your final soil preparation before sowing your grass seed. Or, apply up to ten days after the grass seed has been sown.
- Higher phosphate levels for quicker and stronger root structure
- Nutrient release over a 4-6 week period
- Contains NPK at a ratio of 6.9.6
- Apply at 50g per sqm. Coverage: 20kg per 400sqm
Working in just 24 hours, this liquid treatment will instantly provide a rapid green-up as well as promoting healthier grass. This Liquid Iron Lawn Feed can be used on lawns containing moss, without promoting undesirable rapid growth and helps the lawn recover from stress.
- Produces a healthy, vibrant lawn
- Can be used on lawns containing moss
- Apply from March to November
- For best results, apply every 2-3 weeks
- Contains: 4% Nitrogen, 6% Iron, 5.4% Sulphur, 1% Manganese
- 1 litre covers 200sqm
Liquid Seaweed is perfect for helping lawns recover after stresses such as extreme heat or drought, and enhancing uptake from fertiliser applications. This fast and effective treatment improves soil structure and biology to strengthen grass roots for healthy lawns. Easy-to-apply natural liquid lawn fertiliser can be used in either a watering can or sprayer.
- Rich in trace elements
- Apply from March to November
- For best results, apply every 2-3 weeks
- Contains: 100% seaweed extract from a sustainable source
- 1 litre covers 200sqm
The most versatile of our range of liquid fertilisers, our Year Round Rapid Green greens up within as little as 24 hours and helps to promote a rich-green colour without the growth. This product is powerful liquid iron, plus magensium for a quick and long-lasting green up.
- Rapid green-up in 24 hours
- Apply from March to November
- For best results, apply every 2-3 weeks
- Contains: 4.0.2 + 4% MgO + 1% Fe
- 1 litre covers 200sqm
An extremely effective and direct approach for an additional boost during the summer months. Working almost instantly, our Spring & Summer Liquid Fertiliser is a great addition to your regular granular routine for instant lawn revival to promote healthy, vibrant growth.
- Encourages healthy, vibrant growth
- Apply from March-August
- For best results, apply every 2-3 weeks
- Contains NPK at a ratio of: 16.2.8
- 1 litre covers 200sqm
Choose our Summer Lawn Transformation Kit to bring your lawn back to life this summer and make it better than ever. This great value kit will make your lawn the envy of your neighbours and ready to enjoy by all of the family, all summer long.
Includes:
- Premium Spring and Summer Granular Fertiliser - all of the essential base nutrients for your grass and soil - nitrogen, phosphorus, potassium, magnesium, iron and seaweed.
- Liquid Seaweed - to improve soil structure and microbial activity, leading to healthier and hardier grass.
- Spring & Summer Boost Liquid Fertiliser - to promote healthy growth, improve disease resistance and enhance nutrient uptake.
- Rapid Green Liquid Iron Lawn Feed - to provide quick and long-lasting green up of your lawn.
Our premium spring summer lawn fertiliser contains a balanced blend of nutrients for healthy grass growth along with Iron, Magnesium and Seaweed.
- Granule lawn fertilsier soaks away in to the roots of the grass
- Iron content provides a rapid 'green up'
- Magnesium and Seaweed improve all round health of the grass
- Apply from March to October
- Contains NPK at a ratio of 12.5.5 + 1% MgO, 2% Fe and Seaweed
- Apply at 35g per sqm. 20kg will cover 575 sqm
Apply KissMyGrass Spring and Summer Lawn Fertiliser to give your grass all the nutrients for healthy growth and a great appearance.
- Higher nitrogen content to encourage leaf and shoot growth
- Nutrient release over a 6-8 week period
- Can be applied from March to October
- Contains NPK at a ratio of 11.5.5
- Apply at 35g per sqm. 20kg will cover 575 sqm
The ultimate all-in-one granular lawn fertiliser to revitalise and rejuvenate your lawn, whilst also controlling moss and weeds in one easy application. Leaves your lawn looking lush and green for up to eight weeks, with all of the nutrients it needs to thrive. Make your lawn better than ever with KissMyGrass All In One Lawn Treatment.
- Contains iron to kill moss and give the grass a dark green finish
- Provides nutrients over 6-8 weeks to keep the grass lush and dense
- Apply from March to October
- Contains NPK at a ratio of 10.2.1.7 + 8%Fe + 2.4D + Mecoprop P
- Apply at 32g per sqm. 20kg will cover 625 sqm
Use plant protection products safely. Always read the label and product information before use.
The KissMyGrass Autumn Lawn Transformation Kit will make your lawn better than ever this autumn, recovering from the tough, dry summer. Our great value pack will make a radical improvement to your lawn for all the family to enjoy and admire!
Includes:
- Autumn and Winter Granular Fertiliser - everything your grass is crying out for right now, perfectly proportioned for autumn - nitrogen, phosphorus, potassium, iron and magnesium
- BS Premier Lawn Seed - simply the best grass seed to overseed your lawn to create a thick and dense sward
- Liquid Seaweed - for superior soil structure and enhanced microbial activity, to make your grass strong and vibrant
- Liquid Iron - to provide a rapid 'green-up' in as little as one day
- Autumn and Winter Vitality Liquid Fertiliser - to improve all round plant health as we head towards the cooler winter months
Our most powerful and potent grass feed. Formulated to dramatically improve the appearance of your lawn. Quickly see your grass turn a deep green colour in record time and with maximum effectiveness. It is ideal for lawns that need a visible boost after periods of stress, wear or poor growing conditions. It combines nitrogen, potassium and 9% iron to improve lawn colour, boost vitality and help lawns regain their healthy green appearance.
- Our most powerful tonic
- Apply from March to October
- 4% Nitrogen (N) – supports healthy grass growth and helps maintain a strong, healthy lawn
- 4% Potassium Oxide (K) – helps strengthen grass and improve resilience against stress, wear and challenging weather conditions
- 9% Iron (Fe) – enhances lawn colour, helping to create a richer, deeper green appearance
- Apply at 25-50g per sqm
- 20kg will cover 400-800 sqm
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
Take the guesswork out of lawn care with our complete annual fertiliser programme. Featuring spring summer fertiliser, lawn revivor, and autumn winter fertiliser, this easy lawn care package is designed to keep your grass looking green, and healthy all year round. With one convenient delivery, you’ll receive everything you need to feed your lawn through every seasons, while saving over 10% compared to buying separately.
- 4 applications per year
- Supports strong root development in spring
- Promotes growth throughout the summer months
- Repairs and strengthens lawn in autumn
- Provides effective rapid-green up
- All-in-one annual programme for professional-quality results
- Apply granualar fertilisers at 35-60g per sqm
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Apply Spring and Summer Lawn fertiliser to give your grass all the nutrients for healthy growth and a great appearance.
- Higher nitrogen content to encourage leaf and shoot growth
- Nutrient release over a 6-8 week period
- Can be applied from March to August
- Contains NPK at a ratio of 11.5.5
- Recommended coverage is 20kg per 575sq/m. Apply at 35 grams per sq/m
Autumn and Winter Fertiliser is specially formulated to provide nutrients throughout the winter period.
- Provide essential nutrients to protect lawn throughout winter
- Iron will give the grass a deep green colour
- Nutrient release over a 6-8 week period, apply from Sept - Nov
- Contains NPK at a ratio of 6.5.10 + 2%Fe + 1% Mg
- Recommended coverage: 20kg per 400sqm. Apply at 50g/sqm
KissMyGrass Lawn Feed from Boston Seeds
Our lawn feeds and fertilisers and moss control products have been specially formulated to deal with a variety of grass needs - from domestic to commercial uses. Products like BS Spring & Summer Lawn and Sportsfield Fertiliser encourage leaf and shoot growth to create a hardy grass sward for lawns and sports whilst maintaining a luscious green appearance. BS Premium Spring Lawn Fertiliser provides essential nutrients like nitrogen, phosphate and potassium as well as vital trace elements to help revive and revitalise your lawn to get it back looking its best.
When spreading fertiliser, we recommend using a seed spreader to ensure an even distribution of fertiliser across your lawn. An even covering of fertiliser is important to encourage a uniformed, luscious green lawn without any patchy areas.
After you’ve found the best fertiliser for your needs, why not check out our range of grass seed and wildflower seeds to really make the most of your space?
How we can help!
At Boston Seeds we take pride in excellent customer service. We have been helping create beautiful lawns for years, so whatever you need we can help.
With Next Day Delivery on hundreds of items too, choosing from our extensive range of fertilisers couldn't be easier. Ordering regularly or looking for large volumes? Click here to apply for a trade account today - we review all applications within one working day.
Lawn Feed & Lawn Fertiliser FAQs
What is lawn feed?
Lawn feed, otherwise known as lawn fertiliser, supplies your grass with essential nutrients to help develop thicker, greener and stronger grass. Nutrients include nitrogen (N), phosphorus (P) and potassium (K).
Why use lawn feed?
The three ingredients in lawn feed help promote a healthy lawn, each helping with different things. Nitrogen helps green leaf growth, while phosphorus supports a strong root development and potassium improves overall strength and disease resistance.
How often should I add lawn feed to my lawn?
Depending on the quality of your lawn, most lawns will need feeding 2-4 times per year, during the growing season, then adding fertiliser every 6-8 weeks can help improve overall growth and quality of your lawn. At Boston Seeds, we have lawn transformation kits for every season that contain everything you need to grow a healthy and great looking lawn.
Should I choose liquid lawn feed or granular lawn feed?
Granular and liquid lawn feed are both great for your lawn, but have slightly different properties.
- Granular lawn feed / fertiliser is longer lasting with slow release nutrients. It is great for beginners or for those looking for more cost effective solutions.
- Liquid lawn feed / fertiliser provides faster, more immediate results, it requires more precise application making it great for spot treating small, patchy areas.
Which is better for you will depend on your lawn requirements. Granular lawn feed is often recommended in spring and autumn, whereas liquid feed can be great in summer to quickly improve your lawn.
Why choose Boston Seeds?
With over two decades of experience, Boston Seeds is a family-run business whose passion lies in creating beautiful outdoor spaces with high-quality lawn grass and wildflower seed mixtures. We stock everything you need to create a beautiful lawn or wildflower meadow, from lawn fertiliser to seed spreaders.
When buying from Boston Seeds, you are buying:
- Quality assurance: Every one of the lawn fertilisers we stock has been expertly formulated and rigorously tested to ensure they help create beautiful, lush and healthy lawns.
- Customer satisfaction: We take pride in providing the best possible service and product for our customers. If you’ve got any questions or concerns our team is always happy to help.
- Expert advice: We are always on hand to help provide expert advice on planting and sowing your lawn seed to ensure you get the best lawn. Take a look at our advice section or get in touch.
- Versatility: Whatever your needs and requirements are, we’ve got the lawn fertiliser for you. Whether you’re looking for spring fertiliser, or something to help protect your lawn in the winter we’ve got it all.
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.