• Sea of Green seaweed meal organic soil conditioner by Mowd
  • Sea of Green seaweed meal granules
  • Mowd's Sea of Green Front product label
  • Mowd's Sea of Green Rear product label
  • Mowd's Sea of Green products on well kept garden grass with a hand fertiliser spreader
  • Mowd's Sea of Green products on well kept garden grass with a hand fertiliser spreader and cobra lawn mower
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Sea of Green Seaweed Meal

Sea of Green Seaweed Meal

Year-round (best in spring & summer) feed

The all-natural lawn superfood

£10.80
£10.80
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  • ✓Promotes stress-resistant, healthy lawns
  • ✓Increases soil fertility and microbial activity
  • ✓Improves aeration and structure, especially in clay
  • ✓Boosts water-holding capacity in sandy soils
  • ✓Rich in trace elements for plant health
  • ✓Organic, gentle, slow nutrient release

We match the pack size to your lawn — just choose your area above.

Measure your lawn · or estimate: small ≈50m², medium ≈150m², large ≈300m².
Good to know
  • ✓Suitable for soil conditioning & renovation
  • ✓Non-toxic & organic; water in before children & pets use the lawn
  • ✓Apply in Year-round (best in spring & summer)

UK-made seasonal feed · Slow-release · also available on a Lawn Plan

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Sea of Green Seaweed Meal boosts soil fertility, improves soil structure and moisture retention, promotes stress-resistant lawns and supports healthy, sustainable growth - reducing the need for chemical fertilisers.

Nutrients, coverage & application

Coverage & application

Coverage
14–28 m² per kg
Application rate
35–70 g/m²
Season
Year-round (best in spring & summer)

Nutrients

NPK 2-0.7-3.6

Seaweed harvested from the Atlantic Ocean.

  • Nitrogen (N) = 2%
  • Phosphorus (P) = 0.7%
  • Potassium (K) = 3.6%
Diagram showing seaweed meal improving soil structure

Great for lawn renovation - whatever your soil

Lawn renovation is a great time to introduce seaweed to your lawn. Spreading seaweed meal into freshly cored holes helps aerate heavy clay soils while enabling sandy soils to retain more moisture. It really is the silver bullet of lawn care.

Soil nutrients released as pH is balanced

Neutralise your soil's pH

By neutralising the pH of your soil, it releases nutrients locked in the soil so the grass plant can use previously unavailable nutrients.

Grass seed germinating in fertile soil

Improve soil fertility

With improved soil fertility comes better germination and stronger root establishment. The better the roots, the better the shoots.

Why Mowd?

Right feed, right time

Seasonal formulas matched to what your lawn needs now — not a one-size-fits-all box.

Slow-release, less waste

Controlled-release feeds steadily for up to 3 months, with fewer nutrients lost to leaching.

Made by turf pros

Built on 40+ years of sports and domestic turf experience, blended and bagged in the UK.

Help when you need it

Plain-English guidance, the free MyLawn app and UK-based support if you ever get stuck.

Ready to feed your lawn this summer?

Pick your lawn size for the exact amount you need - or let a Lawn Plan do the timing for you.

  • ✓The right treatment auto-delivered each season
  • ✓Never miss a feeding window or run out
  • ✓Better value than buying treatments one by one

Frequently asked questions

What are the benefits of using seaweed meal on my lawn?
Seaweed meal doesn't give immediate visual results like an iron feed - it's doing the foundational work on your soil health. It improves soil structure, boosts microbial activity, enhances root growth and provides trace minerals that promote healthy, vibrant grass, while helping the lawn resist stress from drought, heat or pests. It's a great addition to a full lawn-care programme.
How do I apply seaweed meal to my lawn?
Seaweed meal is applied in granular form - spread it evenly across the lawn and water it in.
When is the best time to apply seaweed meal?
Seaweed meal can be applied at any time of year, but it's most effective during the active growing season (spring and summer). Applying in early spring helps grass recover from winter and promotes healthy growth.
Is seaweed meal safe for pets and children?
Sea of Green Seaweed Meal is a non-toxic, organic treatment. As with any lawn treatment, water it in before allowing pets and children onto the surface, always check the label for specific guidance, and store lawn products safely where they can't be spilled or eaten.
Can I use seaweed meal with other fertilisers or treatments?
Yes, absolutely. Seaweed meal is a great supporting treatment that helps raise the effectiveness of your other feeds and fertilisers.

What lawn owners say

4.6/5 on Trustpilot · 62 reviews · read our reviews →

Not sure what your lawn needs next?

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