Seed Start Pro
- Regular price
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£29.99 - Regular price
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- Sale price
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£29.99
Kick-start strong root development and healthy early establishment for new lawns.
➡️ Essential Extra's...
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Give new lawns the strongest possible start with a specialist seed and turf fertiliser designed to support fast establishment, strong root development, and healthy early growth.
Seed Start Pro is formulated specifically for newly seeded, overseeded, and turfed lawns, delivering balanced early nutrition that supports young grass without overstimulating soft, weak growth. A higher phosphorus content encourages deep, resilient root development, while controlled levels of nitrogen support steady shoot growth as the lawn establishes.
✅ Professional-grade fertiliser for home use – the same quality formulation trusted by lawn care professionals, carefully adapted for domestic lawns
🌱 Supports strong root development from the start – higher phosphorus content helps young grass develop deep, resilient roots for long-term lawn health
🌿 Balanced early nutrition for healthy establishment – controlled nitrogen feeds steadily without stressing delicate seedlings or new turf
🕒 Feeds for up to 12 weeks – provides consistent nourishment during the critical establishment period
Suitable for use in spring and early autumn, Seed Start Pro is ideal for new lawns, overseeding after scarification, and preparing soil before laying turf. Once established, your lawn can then transition onto a seasonal Johnson Lawn Care Direct fertiliser for continued healthy growth.
Shipping, Returns & Our Guarantee
Same Day Despatch
Order before 3pm (Mon–Fri) for same-day despatch. All orders are shipped using a tracked 24-48 hr service.
Delivery
• Free delivery on all orders up to 25kg. Most arrive next day, but please leave up to 48 hours.
• 25kg bags: £7.99 delivery via a 24-48 hour tracked service.
Returns
Changed your mind? No problem. You can return unopened, unused items within 14 days. Just contact us to get started. Return postage is not included.
➡️ View our Returns & Refunds Policy
Green-Up Guarantee
We’re so confident in our fertiliser, we guarantee visible improvement within 14 days when applied as directed. If not, we’ll give you a refund or store credit towards your next purchase. Conditions apply. Click below for full details.
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Made in Britain
Product Details
How Much Do I Need?
All our fertilisers are designed to be applied at 25g per m² — the perfect rate for professional results without the risk of overfeeding.
You might be used to heavier application rates with DIY products, but our formulas are concentrated, so a little really does go a long way.
To work out how much you need:
- Measure your lawn using our handy Lawn Size Calculator.
- Multiply your lawn’s size (in m²) by 25g
- Choose the pack size that covers your area — if you’re between sizes, round up to ensure full coverage.
Bag coverage guide:
- 50m² bag = 1.25kg
- 100m² bag = 2.5kg
- 200m² bag = 4.7kg
- 500m² bag = 12.5kg
- 1000m² bag = 25kg
Stick to 25g per m² and you’ll see fast, safe, and visible improvement.
How to Apply?
Follow these simple steps for best results:
For further detailed instructions, see our How to Apply Lawn Fertiliser Guide
Ingredients and How They Help My Lawn
Every lawn feed we create is designed with purpose — to give your grass exactly what it needs, when it needs it. Each blend in our range uses a carefully balanced mix of nutrients to boost colour, strengthen roots, build resilience and improve overall lawn health.
Our seasonal fertilisers are also formulated to work in harmony across the year — each one building on the last. When used together, they deliver the perfect balance of nutrition to keep your lawn looking its best in every season.
Additional Information
NPK Ratio ?
Additional Ingredients
Application Rate
Spreader Setting
When to Apply
Season
Longevity
Granule Size
Watering
Child & Pet Safe
Storage & Safety
Safety Data Sheets ?
FAQs
What type of lawn fertiliser should I use?
The best results come from using a fertiliser that is formulated specifically for the current season.
Different times of year require different nutrient balances. A one-size-fits-all product cannot provide the same level of targeted support.
Our seasonal range was developed through years of professional lawn care experience and is designed to work as a complete programme throughout the year. When used consistently, it builds stronger roots, more even colour and better resilience.
- Spring Surge Pro supports recovery and early growth.
- Summer Boost Pro provides steady feeding during heat and dry spells.
- Autumn Guard Pro focuses on strengthening roots before winter.
- Winter Shield Pro helps maintain colour and resilience in colder conditions.
When is the best time to apply lawn fertiliser in the UK?
Apply lawn fertiliser when the grass is actively growing and soil temperatures are above 8°C.
The lawn should be frost-free and not waterlogged. Avoid applying just before heavy downpours. Light rain within 1–2 days is ideal, as it helps move nutrients into the soil.
How much fertiliser do I need for my lawn?
All Johnson Lawn Care Direct fertilisers are applied at 23–25 grams per square metre.
Although this may not look like a large amount, it is precisely the correct rate for professional-grade fertiliser. More does not mean better. Careful measurement ensures safe, consistent results and helps you get the full benefit from each bag.
If you are unsure of your lawn size, use our online measuring tool before you begin.
As a guide:
- 50m² lawn = 1.25kg
- 100m² lawn = 2.5kg
- 200m² lawn = 5kg
- 300m² lawn = 7.5kg
- 400m² lawn = 10kg
- 500m² lawn = 12.5kg
- 1000m² lawn = 25kg
Applying more will not improve results and increases the risk of overfeeding. Measuring accurately is key.
How often should I apply lawn fertiliser?
For a strong, healthy lawn, fertiliser should be applied every 10–12 weeks using a product designed for the current season.
Lawns have different needs throughout the year. Spring feeding supports recovery and growth, summer feeding helps the lawn cope with heat and stress, autumn feeding strengthens roots, and winter feeding maintains condition during colder months.
Feeding seasonally and consistently is what builds long-term lawn health.
Many customers choose our auto-delivery option so the correct seasonal fertiliser arrives automatically every 3 months. It takes the guesswork out of timing and ensures the lawn is always supported at the right stage of growth. For more information, see our Fertiliser Range.
How do I apply lawn fertiliser safely and effectively?
The safest and most effective way to apply lawn fertiliser is to measure carefully and spread evenly at 23–25g per square metre.
Professional-grade fertilisers are more concentrated than typical shop products. Accuracy is important. Applying more will not improve results and may cause damage.
Using a handheld or broadcast spreader makes it much easier to achieve an even finish. If you do not already have one, our Handheld Fertiliser Spreader is designed specifically to deliver the correct application rate.
When applied correctly and at the right time of year, seasonal feeding produces visible improvement within days.
Can I apply lawn fertiliser by hand?
Yes, but extra care is needed.
Measure the full amount out before you begin and wear gloves. Familiarise yourself with what 25g per square metre looks like, then spread small amounts evenly as you walk to avoid over-application in one area. Uneven hand application is the most common cause of dark patches or scorch.
A spreader provides more consistent results.
How do I spread lawn fertiliser evenly?
The most reliable method is to use a spreader and apply in two passes at right angles to each other.
This helps prevent missed strips and overlapping areas.
Before applying to the whole lawn, you can calibrate your spreader by testing on a measured 10m² area to ensure the correct rate.
Do I need to water lawn fertiliser in?
Yes. Our Spring, Autumn and Winter fertilisers must be watered in within 1–2 days of application. Watering moves the nutrients into the soil and down to the root zone where they are needed. If left sitting on the leaf during warm or dry conditions, concentrated nutrients can cause the grass to scorch, resulting in brown patches.
Summer Boost Pro works differently.
It contains a technologically advanced moisture-responsive nitrogen coating. Unlike conventional fertilisers that begin releasing immediately, this coating responds to moisture and temperature. Feeding begins only when moisture returns.
This means Summer Boost Pro can safely be applied during dry spells and even during hosepipe bans without the same risk of scorch. When rain arrives, feeding begins naturally.
If you are able to water during dry conditions, results will always be enhanced. However, the formulation is specifically designed to provide greater flexibility and safety during summer stress.
How long does lawn fertiliser take to work?
In active growing conditions, you can usually expect visible improvement within 7–10 days.
Cooler temperatures or low moisture may slow visible results slightly. Fertiliser also supports root development beneath the surface, which may not be immediately visible.
How soon can I mow after applying lawn fertiliser?
Avoid mowing for 1-2 day before application and 2–3 days after application to allow the fertiliser to settle and begin working.
Is lawn fertiliser safe for children and pets?
All of our fertilisers are safe for children and pets to walk on once it has been watered in and the grass is dry. We do not recommend grazing pets are allowed to digest the grass for at least 4 weeks. For more information, see our Children & Pet Safety Guide.
How do I avoid common mistakes when using lawn fertiliser?
Most issues arise from over-application, uneven spreading or incorrect timing.
Measure carefully. Apply evenly. Follow seasonal timing.
Professional-grade fertiliser works extremely well when used correctly. Feeding little and often, in line with the seasons, produces far better long-term results than occasional heavy applications.
That is why our fertilisers are designed as a year-round programme rather than a single treatment.
How It Works
1. Calculate your lawn size
Our bags fit typical lawn sizes. Not sure how big yours is? Use our quick online Lawn Size Calculator. No guesswork, no measuring, just a few clicks.
Measure my lawn2. Easy Application
Applying our granular fertiliser is quick and straightforward — no mixing, no fuss.
Just measure the right amount, pour it into your handheld spreader, walk your lawn, and you’re done in minutes.
No specialist tools or experience needed.
The Lawn Envy Masterclass shows you step by step how to calibrate your spreader and apply like a pro.
3. Water your lawn
Once you’ve applied the fertiliser, give your lawn a light watering to activate the nutrients. For our Summer Boost Pro, there’s no need to water it in immediately – it’s designed to work even in dry conditions, making it perfect for hot summers and hosepipe bans.
4. Enjoy: Safe for all the family
Your lawn is ready to be enjoyed by everyone. Our fertilisers are safe for children and pets to walk on once the lawn has been watered in and dry.
Join Thousands of Homeowners and Transform Your Lawn
A lush, green lawn isn’t out of reach. With our expert-formulated fertilisers, you’ll achieve professional results you can be proud of – just like these homeowners have.
Our customers tell it better than we do!
GET STARTED →Why choose Johnson Lawn Care Direct?
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Green-Up Guarantee
We’re confident you’ll see a real improvement fast. If your lawn doesn’t start greening within 14 days, we’ll refund you. No fuss, no hoops – just results.
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Child & Pet Safe
No need to stay off the grass. Our fertilisers are safe for children & pets to walk on once your lawn is watered in and dry – so the lawn can keep looking its best without interrupting family life.
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Expertly Formulated Blends
Our exclusive lawn fertilisers are developed in-house by seasoned lawn care professionals, delivering the precise nutrients your lawn needs for stunning, pitch-quality results.
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Seasonal Precision
Your lawn receives perfectly timed treatments tailored for each season, ensuring vibrant, lasting growth from spring through winter.
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Professional-Grade Quality
We use the same top-tier ingredients trusted by lawn care experts, so you enjoy results that outshine the neighbours - every time.
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Effortless Seasonal Subscriptions
Receive seasonally balanced fertilisers every 12 weeks. Over time, you’ll see a healthier, denser lawn that not only looks incredible today, but grows stronger and more resilient season after season.
