Ironite Mineral Supplement 1-0-0 | Deep Green Lawn Color
Green lawns, gardens, and landscape plants with Ironite Mineral Supplement 1-0-0, an iron-rich, non-burning granular formula for deep color and reduced mowing.
Maintain a lush, deep green lawn without encouraging excessive top growth. Ironite Mineral Supplement 1-0-0 is a granular iron and sulfur lawn and garden supplement designed to improve color in grass, flowers, shrubs, vegetables, and trees. Its low-nitrogen, zero-phosphorus, zero-potassium formula is ideal for use between regular spring and fall fertilizer applications, helping your landscape stay vibrant through the growing season.
Unlike high-nitrogen lawn fertilizers that can push rapid grass growth and increase mowing, Ironite focuses on rich green color support. When applied as directed at the label rate of 3 lbs. per 1,000 sq. ft., it is labeled non-burning and non-staining, making it a practical choice for summer lawn color maintenance and routine landscape care. A 15 lb bag treats up to 5,000 sq. ft.
Key Benefits Chart
| Feature |
Customer Benefit |
| Deep green lawn color |
Helps grass and foliage develop a richer, darker green appearance. |
| Reduced mowing support |
Promotes color without the growth surge commonly associated with high-nitrogen fertilizers. |
| Summer lawn use |
Can be used through summer on actively growing turf when applied as directed. |
| Non-burning formula |
Will not burn or damage grass, plants, or shrubs when used at the label rate. |
| Non-staining formula |
Labeled non-staining when used as directed; sweep granules off hard surfaces after application. |
| Versatile landscape use |
Suitable for lawns, flowers, shrubs, vegetables, trees, hedges, and fruiting plants. |
| Fertilizer routine booster |
Works as a supplement between regular spring and fall feeding programs. |
University turfgrass guidance supports the use of iron for darker green turf color without the excessive growth response often caused by nitrogen, while also noting that iron is a supplement and not a full replacement for nitrogen fertilization.
Quick Product Specifications
| Specification |
Details |
| Product Name |
Ironite Mineral Supplement 1-0-0 |
| Product Type |
Granular lawn and garden mineral supplement |
| NPK Ratio |
1-0-0 |
| Nitrogen |
1.0% total nitrogen |
| Phosphorus |
0% |
| Potassium |
0% |
| Additional Nutrients on 1-0-0 Label |
Calcium 11.0%, Sulfur 33.0%, Iron 9.9% |
| Bag Size |
15 lb |
| Coverage |
Up to 5,000 sq. ft. |
| Application Rate |
3 lbs. per 1,000 sq. ft. |
| Use Sites |
Lawns, flowers, shrubs, vegetables, and trees |
| Best Use |
Greening supplement between regular fertilizer applications |
The 1-0-0 label lists the guaranteed analysis as 1.0% nitrogen, 11.0% calcium, 33.0% sulfur, and 9.9% iron, and states that the formula provides 0.03 lb of nitrogen per 1,000 sq. ft. per application when used as directed.
How to Use Ironite Mineral Supplement 1-0-0
| Step |
Application Guidance |
| 1. Prepare the lawn |
For best results, mow and water the lawn 1–2 days before application. |
| 2. Apply evenly |
Use a spreader to apply the product to either a wet or dry lawn. Apply around the perimeter first, then cover the interior with slightly overlapping passes. |
| 3. Use the correct rate |
Apply at 3 lbs. per 1,000 sq. ft.
|
| 4. Clean hard surfaces |
Sweep any granules from sidewalks, driveways, patios, or streets back onto the lawn immediately after application. |
| 5. Water deeply |
Water thoroughly after applying to help move nutrients into the soil. |
| 6. Repeat as needed |
Pennington recommends using it 4 times per year as a supplement to a regular fertilizer program; do not exceed 10 lawn applications per year. |
| 7. Follow safety guidance |
Children and pets may re-enter the treated area once it has dried. |
*The label also advises applying only to actively growing turf, avoiding application near water, storm drains, or drainage ditches, and not applying if heavy rain is expected.
