Grass seed. Done right.
GROW
WHAT
LASTS.

Precision grass seed matched to your exact soil, light, and conditions. No guesswork. Just results.

FIND MY MIX →
Customer success rate
94%When using a matched seed blend
L.T.
L.T.
L.T.
12 yrs research
47 varieties trialled
Free UK delivery
FULL SUN◆CLAY SOIL◆DEEP SHADE◆ACID SOIL◆FAMILY LAWNS◆HARD WEARING◆DROUGHT PROOF◆SCIENCE-LED◆FULL SUN◆CLAY SOIL◆DEEP SHADE◆ACID SOIL◆FAMILY LAWNS◆HARD WEARING◆DROUGHT PROOF◆SCIENCE-LED◆
01
Personalised
MATCH YOUR
LAWN IN
3 STEPS.

Tell us about your garden. We'll do the science.

HOW MUCH SUN?
Think about the bulk of your lawn on a typical summer's day.
FULL SUN
6+ hours direct daily
PARTIAL
3–6 hours daily
SHADE
Under 3 hours daily
Step 1 / 3
WHAT'S YOUR SOIL?
Pick the closest match — our free test kit helps if you're unsure.
CLAY
Sticky wet, cracks dry
SANDY
Drains fast, gritty
LOAM
Crumbly, holds moisture
CHALKY
Pale, stony, dries fast
ACID
Dark, spongy
NOT SURE
We'll pick a versatile blend
Step 2 / 3
WHAT'S THE GOAL?
This shapes the hardiness and look of your blend.
SHOW LAWN
Fine, lush, immaculate
FAMILY & PETS
Hard-wearing, self-repairing
ECO LAWN
Low-mow, wildlife-friendly
PATCH REPAIR
Fast germination, fills gaps
Step 3 / 3
YOUR MATCH.
Based on your garden — here's exactly what you need.
COMPLETE BUNDLE — BUILT FOR YOUR GARDEN
Seed mix + soil treatment + programme feed + guide
Save £18 · 25% off
£54.00
02
The Range
SEED FOR
EVERY GARDEN
IN BRITAIN.

47 cultivars trialled. 6 blends perfected. One for your lawn.

Full Sun · All Soils
GOLDEN SUMMER
Drought-tolerant deep-rooting fescues that stay green while other lawns brown. Engineered for British summers.
Drought resistantDense swardpH 6.0–7.5
£24.99 / 500g
Partial Shade · Most Soils
DAPPLED LIGHT
Shade-adapted fescues blended with wood meadow grass. Thrives under canopy, near walls, in mixed gardens.
Shade tolerantFine texturepH 5.5–7.0
£26.99 / 500g
Deep Shade · N-Facing
FOREST FLOOR
Our most extreme shade formula. Establishes in under 3 hours of sun daily using low-light specialist cultivars.
Deep shadepH 5.0–6.5Low mow
£29.99 / 500g
Clay Soil Specialist
HEAVY CLAY
Built for Britain's toughest soil. Aggressive root architecture breaks compaction while establishing fast even waterlogged.
Clay specialistAnti-compactionpH 6.0–7.5
£27.99 / 500g
Acid & Peaty · pH 4.5–6.0
ACID ADAPTED
Thrives where other grasses give up. Acid-tolerant cultivars for peaty, moorland-type soils across Scotland and NW England.
Acid tolerantpH 4.5–6.0Low feed
£28.99 / 500g
Family · Pets · High Traffic
TOUGH LOVE
Our best seller. Heavy-duty perennial ryegrass that self-repairs, bounces back from heavy use, handles everything.
Hard wearingSelf-repairingpH 5.5–7.5
£22.99 / 500g
47
Grass varieties trialled in British conditions
94%
Customer success rate using a matched Lawn Theory blend
12
Years of UK turfgrass research behind every blend
2.4×
Deeper root growth vs standard varieties in clay
03
Soil Intelligence
KNOW YOUR
SOIL. OWN
YOUR LAWN.

pH is the single most important factor in lawn success. Most people don't know theirs.

ACID SOIL
pH 4.5–6.0
Common across the Scottish Highlands, Welsh valleys, and North West England. Dark, spongy texture — but nutrient-starved without intervention.
pH 4.0 · Very AcidpH 8.5 · Alkaline
Phosphorus locks up below pH 5.5 — grasses yellow even with plenty of fertiliser
Add lime at 75g/m² to raise pH by 0.5 — always test before treating
Our Acid Adapted blend thrives here without any soil amendment
Use nitrate-based feeds — ammonium fertilisers further acidify your soil
🌱 Surface 0–5cmpH 4.8
🪱 Root zone 5–20cmpH 5.2
🏔️ Subsoil 20cm+pH 5.6
Typical pH Range
456789
NEUTRAL SOIL
pH 6.0–7.0
The sweet spot. Found in good loam soils across the Midlands and South East. Nutrients most available, microbial activity highest.
pH 4.0pH 8.5
At pH 6.5 all major nutrients peak — this is the target for every lawn
No soil amendment needed — regular aeration and NPK feed does it
Test annually — British rainfall acidifies by 0.2–0.3 pH units per year
Every Lawn Theory blend performs at its absolute best in this range
🌱 Surface 0–5cmpH 6.5
🪱 Root zone 5–20cmpH 6.8
🏔️ Subsoil 20cm+pH 7.0
Typical pH Range
456789
ALKALINE SOIL
pH 7.0–8.5
Chalk and limestone country — Lincolnshire, Yorkshire Wolds, South Downs. Pale, stony, prone to iron deficiency and drought.
pH 4.0pH 8.5
Iron locks up above pH 7.5, causing yellowing — use chelated iron to bypass this
Sulphur or sulphate of ammonia lowers pH gradually at 30–50g/m²
Golden Summer and Dappled Light both carry alkaline-tolerant cultivars
Water more frequently — alkaline soils have poor moisture retention
🌱 Surface 0–5cmpH 7.4
🪱 Root zone 5–20cmpH 7.8
🏔️ Chalk layer 20cm+pH 8.2
Typical pH Range
456789
CLAY SOIL
Up to 30% of British gardens sit on clay. Rich in nutrients but compacts hard, waterloggs in winter, bakes in summer.
pH 4.0pH 8.5
Annual hollow-tine aeration every autumn is non-negotiable
Brush sharp sand into aeration holes to create permanent drainage channels
Heavy Clay Champion's deep roots naturally fracture compacted layers
Stay off waterlogged clay — surface compaction sets fast
🌱 Topsoil 0–10cmpH 6.5
🏺 Clay pan 10–30cmCompacted
🪨 Subsoil 30cm+Dense
Typical pH Range
456789
SANDY SOIL
Free-draining and early to warm in spring. Common in coastal areas, East Anglia, and the South East. Nutrient-hungry and drought-prone.
pH 4.0pH 8.5
Sandy soils need 3× more frequent feeding — nutrients leach rapidly after rain
Add organic matter annually to boost water and nutrient retention
Golden Summer's deep fescues reach moisture that surface roots can't
Sandy soil can hit drought stress within 3 days without rain in summer
🌱 Surface 0–5cmpH 6.0
🏖️ Sand layer 5–40cmFree-draining
🪨 Substrate 40cm+Variable
Typical pH Range
456789
04
Backed by Research
WE DON'T
GUESS. WE
MEASURE.

12 years of independent UK turfgrass trials underpin every blend we make.

Soil Science · pH & Nutrient Uptake
"Lawns growing in soil with a pH between 6.0 and 7.0 show up to 40% greater nutrient uptake efficiency, directly impacting colour, density, and disease resistance."
— British Turfgrass Research Group, 2022 Annual Review
Grass Physiology · Shade Performance
"Deep-rooted fine fescue cultivars developed for shade demonstrate a 3× survival advantage over standard mixes receiving less than 3 hours of daily sunlight."
— Lawn Theory Internal Trial Data, 2023 (N=240 plots, 6 UK sites)
Climate Resilience · 2022 UK Drought
"Turf swards with rooting depth exceeding 18cm maintained active growth for 23 additional days without supplemental irrigation vs shallow-rooted standard varieties."
— Royal Horticultural Society, Drought Impact Study 2022
Clay Soil · Root Architecture
"Lawn Theory's clay-specialist cultivar mix produced 2.4× deeper root development in compacted clay profiles at 12 weeks vs leading generic seed mixes."
— Lawn Theory Internal Trial Data, Clay Performance Series 2022
05
Learn
THE INTEL
YOU ACTUALLY
NEED.

Lawn advice based on science, not guesswork.

Essential Guide
THE 7 THINGS THAT ACTUALLY MAKE A GREAT BRITISH LAWN
Wrong grass, wrong pH, wrong mowing height — most lawn failures trace back to three causes. This is the science-backed guide professionals use, explained for everyone.
Dr. Sarah Holt, Turfgrass Scientist · 18 min read
→
Soil Science
HOW TO TEST YOUR SOIL PH AT HOME
Step-by-step from basic kits to digital meters, with a results chart for grass selection.
Beginner · 8 min read
→
Lawn Care
THE ONE MOWING RULE THAT CHANGES EVERYTHING
Never cut more than one third of the blade. Here's the physiology — and how to apply it every season.
Quick read · 5 min
→
06
Year-Round
YOUR LAWN
CALENDAR.

Exactly what to do, and when — every month of the year.

SPRING
  • First mow at 50mm when growth returns
  • Pre-emergent feed at soil temp 10°C
  • Overseed bare patches from winter
  • Scarify thatch if deeper than 10mm
  • Soil pH test after winter acidification
SUMMER
  • Raise mowing height to 35–40mm
  • Deep water 1–2× per week, early morning
  • Slow-release summer feed, low nitrogen
  • Allow browning in drought — it recovers
  • Watch for chafer grubs (birds pecking)
AUTUMN
  • Hollow-tine aeration — most important task of the year
  • Top-dress with sandy loam after aeration
  • Autumn feed: high potassium, low nitrogen
  • Final overseed before winter
  • Rake leaves to prevent fungal disease
WINTER
  • Zero traffic on frosted or waterlogged grass
  • Service mower, sharpen blades
  • Plan next year's improvements
  • Apply lime if pH dropped below 6.0
  • Light mow on mild dry days if growing
07
Complete Kits
EVERYTHING
STACKED.
SAVE 30%.

Agronomist-built bundles that work as complete systems.

STARTER
KIT
New to lawn care? Start here.
500g Versatile Lawn Seed (25m²)
1kg Pre-Seed Lawn Fertiliser
Soil pH Test Kit · 5 tests
Lawn Theory Beginner's Guide PDF
90-day email support
Was £58.00
Save £16 · 28% off
£42
★ MOST POPULAR
FULL
TRANSFORM
Complete kit for serious results.
1kg Matched Seed Blend (50m²)
2kg Pre-Seed & Establishment Feed
5kg Lawn Top Dressing
pH & Nutrient Test Kit · 10 tests
500ml Liquid Lawn Conditioner
Seasonal Schedule + Expert Call
Was £118.00
Save £34 · 29% off
£84
YEAR
ROUND
12 months of lawn care, delivered seasonally.
Spring: Overseed + Spring Feed
Summer: Drought Tonic + Liquid Iron
Autumn: Aeration Mix + Autumn Feed
Winter: Lime + pH Stabiliser
Quarterly expert review calls
Was £196.00
Save £58 · 30% off
£138
08
Real Results
DON'T TAKE
OUR WORD
FOR IT.
★ ★ ★ ★ ★
Tried three different seed mixes over four years with no luck. Lawn Theory's finder told me clay and partial shade. Two weeks after sowing — the lawn I'd always wanted.
M
Martin C.
Cheshire · Heavy Clay
★ ★ ★ ★ ★
Realised my soil pH was 5.1 using the guide. Switched to Acid Adapted and added lime. Six months later — genuinely the best lawn on my street. The science works.
S
Sarah T.
Scottish Borders · Acid Soil
★ ★ ★ ★ ★
As a professional landscaper I'm sceptical of consumer brands. Lawn Theory's cultivar choices are genuinely research-backed. Results are consistent across every project I've used them on.
J
James P.
Landscaper · Surrey
GROW
THE
THEORY.

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