Natural Compost Lawn Fertilizer 8-3-5 | Soil Support & Steady Growth

The Lawn Medic | Compost-based fertilizer that improves soil health while feeding turf.

★★★★★ 4.8 stars on over 5,000 orders

Natural Compost Lawn Fertilizer 8-3-5 | Steady Growth + Soil Support

$39.00

Organic SGN 150 Mini Prill Pro Grade Made for Canada Spreader Ready Iron Slow Release Nitrogen

"The fertilizer worked amazing. Lawn was super green all year. Will definitely be purchasing again." - Brent S.

Bag Size: 2kg

2kg
5kg
10kg

Product variants

Coverage (selected size)

Covers up to 706 sq ft

In stock, ready to ship

Pickup available at Pickup Location UPS STORE

Usually ready in 24 hours

100% Organic

A completely organic fertilizer that provides your lawn important nutrients without synthetic products. It can be used individually or part of a full season organic program.

Compost-powered feeding for healthier soil and better turf. This 8-3-5 natural compost fertilizer delivers steady nutrition while supporting soil structure and biology—great for long-term lawn improvement.

8-3-5

NPK

Mini - SGN 150

Prill Size

Granular

Application Type

Slow - 100% Organic

Nitrogen Release

Best For

Soil improvement, overseeding, thin lawns, and homeowners who prefer a natural approach with real performance.

What Makes It Different

This is different because it’s both a fertilizer and a soil amendment. Compost-based feeding adds organic matter that improves moisture retention, soil structure, and microbial activity—while also supplying nutrients. It’s ideal for lawns that need “soil improvement + feeding” in one step, especially where turf struggles due to poor soil quality rather than just lack of fertilizer.

Application Rate

2.7kg (6lbs) to 5.5kg (12lbs) per 1000sqft per application

Minimum Guaranteed Analysis

• Total Nitrogen (N) – 8%
• Available Phosphoric Acid (P₂O₅) – 3%
• Soluble Potash (K₂O) – 5%
• Calcium (Ca) – 5%
• Iron (Fe) – 1%
• Magnesium (Mg) – 0.3%

Product Details

NPK | 8-3-5
Nitrogen Release | Slow | 100% All Natural Slow Release Nitrogen
Prill Size | Regular Prill | SGN 200-250 | Standard prill size for all applications
Application Type | Granular | Apply with any lawn spreader

Storage & Handling & Safety

Storage

We recommend keeping your seed in a cool dry location, especially after opening. This helps to maintain a high germination rate for an extended period of time.

Handling

Seed is safe to handle. However if you are sensitive to airborne particles you may want to wear a mask when adding your seed to a spreader for instance.

Shipping & Returns

Shipping

We ship Canada wide. Most orders are shipped with UPS. Canada Post is used for some locations.

Shipping on Grass Seed is always free. Shipping on fertilizers is calculated based on weight.If your order combines seeds and fertilizers you will only be charged for the weight of the fertilizer. We do our best to offer a balance between fast shipping and reasonable shipping rates.

We strive to ship all orders within 24hrs (48hours max).

Please reach out to use if you have any questions.

Returns

All of our products can be returned within 30 days as long as it is unopened/unused.

If you have a concern with your product after opening it please reach out to use as we always work to find a solution and rectify any issues.

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Spend $200, Get $20 Shipping Credit
Spend $300, Get $30 Shipping Credit
Spend $400, Get $40 Shipping Credit
Spend $500, Get $50 Shipping Credit

Valid on individual fertilizers only. Grass seed is always free shipping.

Pairs well with

In stock! Ships within 1-2 business days.

Expedited shipping on all orders.

Only professional grade fertilizers.

30-Day Return Policy

Natural Compost Lawn Fertilizer 8-3-5 | Steady Growth + Soil Support

2kg

$39.00

A Better lawn starts here

Don't Take Our Word For It

See what our happy customers are saying about how The Lawn Medic helped their lawns.

See All Our Reviews

Expedited Shipping on All Orders

Why This Fertilizer?

Compost-based fertilizers provide nutrients while improving soil structure and biological activity. The organic matter in compost helps increase water retention and nutrient availability within the soil. This creates a healthier root environment where plants can grow more effectively. Regular applications can gradually improve soil quality and support stronger plant growth.

Technical Details

Compost-based fertilizers provide both plant nutrients and organic matter that contribute to improved soil structure. Organic matter enhances soil aggregation, increases water retention, and supports microbial activity within the root zone. Research conducted through the Cornell University Soil Health Laboratory has shown that compost amendments can significantly improve soil biological activity and nutrient availability.

Improved soil conditions allow turfgrass roots to grow deeper and access nutrients more effectively. Studies summarized by the Penn State Center for Turfgrass Science indicate that increased soil organic matter supports healthier root systems and improved turf resilience.

See the difference

Geoff D.

"I used seed and fertilizer from The Lawn Medic in the Spring. The transformation over about 5 weeks was incredible. The pictures tell the story. The new lawn came in thick and green and it has stayed that way all year. No weeds. Strong growth."

Testimonials

"Best result I've ever had in reseeding my lawn. No more big box branded lawn seed with pathetic results. Next fall will be the backyard's turn."
— Jose C.

"Lawn looks freaking awesome in December 😄😄 Will definitely be ordering again in the spring."
— Daryl F.

"Despite this summer’s heat and drought, the lawn stayed healthy. The seed quality is noticeably better than what I’ve bought from big-box stores."
— Ryan C.

FAQs

Please read our FAQs page to find out more.

What makes your products better?

All of our products, including our seeds and fertilizers, were developed for professional uses. This means that you are truly getting the best of the best when it comes to lawn care products. Forget the big box store products and try what the pros use.

Do you provide guides on how to use your products?

Yes, of course we do. Take a look at our Guides page. We will be adding more guides and helpful tools soon as well.

Can you help me decide what I need?

Yes! We are here to help. Contact us anytime with your questions and we will get back to you within 1-2 days with some suggestions. We also have our Guides page which can answer some questions, and we have more helpful tools coming soon.

How can I get your products?

We ship Canada wide by UPS and Canada Post (it depends on the location). Every shipment is expedited to arrive as soon as possible, and ships within 1-2 days. We also have a pickup location in Burlington, Ontario.