Rapid Green-Up Lawn Fertilizer 16-4-8 | Fast Colour Boost

The Lawn Medic | Quick-release nitrogen fertilizer that rapidly improves turf colour and growth.

★★★★★ 4.8 stars on over 5,000 orders

Rapid Green-Up Lawn Fertilizer 16-4-8 | Fast Colour Boost

$39.00

Homogeneous Granules Made for Canada Pro Grade SGN 150 Mini Prill Spreader Ready Iron

"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 1415 sq ft

In stock, ready to ship

Pickup available at Pickup Location UPS STORE

Usually ready in 24 hours

Homogeneous Granules

An advanced formulation where every granule contains the full nutrient blend. Unlike typical fertilizers with separate nutrient particles, this ensures the most even application possible.

A fast, reliable fertilizer for visible improvement. This 16-4-8 blend delivers quick colour and healthier growth with a balanced NPK ratio—perfect when your lawn needs a noticeable lift.

16-4-8

NPK

Mini - SGN 150

Prill Size

Granular

Application Type

Fast - 0% Slow Release

Nitrogen Release

Best For

Early season wake-ups, mid-season tune-ups, and improving thin or tired-looking lawns.

What Makes It Different

This product is built for visible results, fast. It uses a nutrient profile designed to drive quick colour improvement while still supporting roots and turf strength with phosphorus and potassium. Many quick-green products are nitrogen-only; this one is more balanced so you can get the visual improvement without sacrificing overall turf health. It’s especially useful early season or after stress when lawns look dull and thin.

Application Rate

1.4kg (3.1lbs) to 2kg (4.4lbs) per 1000sqft per application

Minimum Guaranteed Analysis

• Total Nitrogen (N) – 16%
• Available Phosphoric Acid (P₂O₅) – 4%
• Soluble Potash (K₂O) – 8%
• Sulfur (S) – 20%
• Iron (Fe) – 1.8%

Product Details

NPK | 16-4-8
Nitrogen Release | Fast | 0% Slow Release Nitrogen
Prill Size | Mini Prill | SGN 150 | Mini sized prills for more even 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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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

Rapid Green-Up Lawn Fertilizer 16-4-8 | Fast Colour Boost

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?

Rapid Green-Up fertilizers are designed to improve lawn colour and growth quickly. Nitrogen is the primary driver of turf colour and leaf development, and this formula provides readily available nitrogen to stimulate rapid plant response. The balanced nutrient profile also includes phosphorus and potassium to support root development and plant strength. This makes it a useful option when lawns need to recover from nutrient deficiencies or when quick visual improvement is desired.

Technical Details

Rapid response fertilizers are designed to provide nutrients in forms that are readily available for plant uptake. Nitrogen availability strongly influences turfgrass colour and growth rate. Research conducted through the Purdue University Turfgrass Science Program shows that nitrogen fertilization significantly increases chlorophyll production and turfgrass canopy density.

Balanced nutrient ratios also supply phosphorus and potassium, supporting root growth and plant strength. Studies from the Penn State Center for Turfgrass Science demonstrate that providing balanced nutrients improves turf recovery and maintains consistent growth during the growing season.

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.