Iron Sulphate 20% Lawn Colour Booster | Deep Green Fast

The Lawn Medic | Iron supplement that enhances deep green colour and supports chlorophyll production.

★★★★★ 4.8 stars on over 5,000 orders

Deep Green Boost Lawn Fertilizer | Iron Sulphate 20%

$25.00

Iron Water Soluble Made for Canada Pro Grade

"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 13300 sq ft (based on 150g / 1000sqft in sufficient water)

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.

Dial up colour fast—without forcing heavy growth. With 20% Iron Sulphate, this deep green booster delivers a bold, darker lawn and helps correct iron-related yellowing.

0-0-0 (20% Iron Sulphate)

NPK

Micro - SGN 90

Prill Size

Powder

Application Type

Soluble

Application Type

Best For

Lawns that look pale or yellow, mid-season colour boosts, and homeowners chasing a darker “golf course” look.

What Makes It Different

This high-strength iron formula provides noticeably deeper lawn colour without pushing excessive growth. Iron sulphate improves chlorophyll production and enhances the natural green colour of turfgrass. Because iron works independently of nitrogen, it can deepen colour without increasing mowing frequency. This makes it a favourite tool used by turf professionals to refine lawn appearance.

Application Rate

Start with no more than 100grams/1000sqft in sufficient water

Minimum Guaranteed Analysis

• FeSO₄·7H₂O – 99.6% min
• Ferrous Iron (Fe) – 20.0% min

Product Details

NPK | 0-0-0 (20% Iron Sulphate)
Nitrogen Release | Fast | Iron Sulphate releases quickly into the lawn
Prill Size | Micro Prill | SGN 90 | The smallest prill size offering the most even and fastest results
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

Deep Green Boost Lawn Fertilizer | Iron Sulphate 20%

2kg

$25.00

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?

Iron plays a critical role in chlorophyll production, which directly influences the rich green colour of healthy turfgrass. This iron supplement helps deepen lawn colour without excessive growth that can occur with high nitrogen fertilizers. Iron sulphate is commonly used by turf professionals to enhance colour while maintaining tight, controlled turf growth. In addition to improving colour, iron also supports overall plant metabolism and helps correct micronutrient deficiencies that may limit turf performance.

Technical Details

Iron plays a critical role in chlorophyll synthesis and directly influences turfgrass colour. Iron deficiency can lead to chlorosis, a condition where leaves lose their green pigmentation. Research from the Michigan State University Turfgrass Program has shown that supplemental iron applications can improve turf colour without significantly increasing growth rates.

Iron sulphate is commonly used in professional turf management to enhance visual turf quality. Unlike nitrogen fertilizers that stimulate rapid growth, iron primarily improves chlorophyll production and leaf pigmentation. This allows turf managers to deepen lawn colour while maintaining controlled growth and mowing requirements.

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.