#1 Home Improvement Retailer

Internet # 205561089

Model # 100532501

15 lbs. Mineral Supplement 1-0-1

  • Fertilizer reverses nutrient deficiencies and greens lawns
  • Use ironite for grass, flowers, vegetables with all soil types
  • Covers up to 5,000 sq. ft.
  • View More Details
Free & Easy Returns In Store or Online
Return this item within 90 days of purchase. Read Return Policy
Product Details

About This Product

The makers of Pennington products bring to you Ironite Mineral Supplement 1-0-1, a unique concentrated formula that provides a deep green lawn without the excessive growth that some nitrogen - rich fertilizers can cause. While nitrogen causes greening and growth, iron provides greening without the growth surge. So if you want to spend more time enjoying your lush green lawn and less time mowing it, apply this premium iron formula any time of year to any type of grass. To deliver lawn care results that truly exceed your expectations, we have enhanced this product with beneficial microbes and advanced soil technology.


Product Information

Internet # 205561089

Model # 100532501

Additional Resources

Shop All Ironite
From the Manufacturer


Dimensions: H 16 in, W 12.5 in, D 3 in


Coverage Area (sq. ft.)5000 sq ftPackage Size (lb.)15
Product Depth (in.)3 inProduct Height (in.)16 in
Product Width (in.)12.5 in


Active IngredientsNitrogen, Potash, Calcium, Sulfur, IronCompatible Grass TypeAll Purpose, Bent Grass, Bermuda, Bluegrass, Centipede, Fescue, Rye, St. Augustine (Floratam), Tall Fescue, Zoysia
Delivery MethodGranularDry Fertilizer TypeDry Lawn Fertilizer
Emergent TypeNeither Pre nor Post EmergentFeaturesWater Soluble
Fertilizer FormulaOtherLongevity (weeks)12
N-P-K Ratio1-0-1OrganicSynthetic
Pack Size1Returnable90-Day
Safe ForSafe For Kids, Safe For PetsSeason UseAll-Season
Time releaseSlow release

Warranty / Certifications

Manufacturer WarrantyN/A

Questions & Answers

Q:Can Ironnite be used at the same time with a fertilizer.
by|Feb 5, 2024
1 Answer
Answer This Question

A:  Hello, Ironite 1-0-1 works great with your traditional fertilizer treatments. Iron is an important micronutrient that isn’t found in many fertilizers but can help give your lawn a nice green coloring. Thank you.

by|Feb 5, 2024
    Q:Is this product ok to use for zoysia grass in a northeast climate? Will it keep the zoysia green for a longer period of time?
    by|Aug 24, 2023
    1 Answer
    Answer This Question

    A:  Hello, you may use this on all types of turf grasses. Ironite is a unique concentrated formula that provides a deep green lawn without the excessive growth that some nitrogen-rich fertilizers can cause. Thank you.

    by|Aug 25, 2023
      Q:Do you need to mix with water to apply??
      by|May 19, 2023
      5 Answers
      Answer This Question

      A:  Hello, Ironite 1-0-1 will need to be watered in after it is applied for it to work properly. Thank you.

      by|Jul 17, 2023
        2 found this answer helpful

        A:  No

        by|May 21, 2023

          A:  no put in spreader

          by|May 21, 2023

            A:  No, Apply with spreader, then water in with irrigation/sprinkler

            by|Jun 19, 2023

              A:  You do not need to mix with water to apply, however, you ask need to water in thoroughly after application.

              by|May 28, 2023
                1 found this answer helpful
                Q:What is the percentage of iron and what is the percentage of sulfur (2023)?
                by|Apr 25, 2023
                5 Answers
                Answer This Question

                A:  100 iron

                by|Apr 27, 2023

                  A:  Hello, the Ironite Mineral Supplement 1-0-0 (2023) shown on the guaranteed Anaylsis is: Iron - 9.9% and Sulfur - 33.0%. Thank you.

                  by|Nov 29, 2023
                    3 found this answer helpful

                    A:  20% Iron and 5% Sulpher It is all listed on the package.

                    by|Jul 7, 2023

                      A:  Taking the information from the bag label, which is on the HD web site, it shows Iron 9.9% and sulfur is 33.0%.

                      by|Nov 29, 2023
                        2 found this answer helpful

                        A:  Iron-20%, Calcium-8%, Sulfur-5%

                        by|Apr 30, 2023
                          Showing 1-4 of 111

                          Customer Reviews

                          4.2 out of 5
                          • 4.2 out of 1,289 reviews
                          • 81% recommend this product
                          Filter by:
                          Showing 1-10 of 1,289 reviews
                          Don't be an idiot stay away from this garbage
                          This product browned my every inch of my lawn it touched. I had the greenest lawn in the neighborhood but not anymore. Stay away from urea based nitrogen. Customer service basically blames the consumer. So don't bother calling. I used on half on my front yard and the other half I did not apply to. Wish I never bought this 😕
                          Response from Ironite TeamJun 5, 2023
                          Hi there. We certainly wouldn't expect this product to cause an experience like this, so we'd like to chat further with you about this. When you have a moment, please give our consumer care center a call at 1-800-265-0761. Thank you! ironite
                            I applied the Pennington ironite and I have noticed a difference in the color and health of my lawn within 2 weeks. I will continue to use this product in the future.
                              • Recommended
                              Bad batch
                              Quality control issues with product. Somehow moisture was inside plastic bag and couldn't use spreader because of clumps. Batch# 22197115ZZ
                              Response from penningtonpwrApr 28, 2023
                              Hello, we are sorry to hear this issue occurred with our product. It sounds like the product was not stored correctly, unfortunately. Please contact customer service so we can assist you further at 1-800-285-7333. Thank you.
                                Good product, uneven granules and dust.
                                [This review was collected as part of a promotion.] The product works good, however the sample I received has lot of uneven granules and a high amount of dust. This dust was enough to create a small cloud of dust around me while using a manual hand help spreader. That being said I was breathing it heavily and that was not very pleasant. 3 stars is generous as the product stands.
                                Response from penningtonpwrOct 20, 2022
                                Hello, thank you for your review! Should you have any questions or require additional assistance, please contact our customer service department toll-free at 1-800-285-7333.
                                  Worked perfectly
                                  Worked great! I had no weeds and grass handled out drought this season well.
                                  Response from Ironite TeamAug 26, 2022
                                  Thank you for your feedback! ironite
                                  • Verified Purchase
                                  1 found this review helpful
                                  Should be called Sulferite...
                                  I noticed they changed the formula this year (2022), compared to last year. The Iron content dropped in HALF from 20% to 9.9% and the Sulfur content went up from 5% to 33%! So the greening effect is being caused by Sulfur more than by Iron. Sulfur will green-up your yard, but it certainly doesn't seem to last as long as Iron.
                                  Response from Ironite TeamAug 15, 2022
                                  Thanks for letting us know. Hearing about your experience is important to us. We hope you'll consider giving us a call at 1-800-265-0761 so we can learn more. ironite
                                    • Recommended
                                    9 found this review helpful
                                    Works very well
                                    [This review was collected as part of a promotion.] We have Bermuda grass and when we received the product we had to wait as it was super hot and dry to lay it down. Once we did and not to long after our grass turned greener, no weeds and it was fantastic to see when you drive past our front yard.
                                      • Recommended
                                      Not sure
                                      [This review was collected as part of a promotion.] I really don't know how to review this product. My husband said we couldn't put it down until there was a good hard down pour. He said he has used this product in the past and was a good product.
                                        • Recommended
                                        Crush Thy Neighbor
                                        [This review was collected as part of a promotion.] Ironite definitely gave my lawn a nice green up! I mowed it to about the 1" mark, put down the ironite and watered in! A few days later, I had a beautiful green lawn that looked great even at night! Would highly recommend!
                                          • Recommended
                                          OMG RESULTS!!!
                                          [This review was collected as part of a promotion.] We have a huge problem with moles and mole crickets so lots of areas in our yard are brown. I am mindblown at how good and fast this stuff worked! The 2nd picture is literally 7 days after the first picture/ first treatment. The grass is WAY greener, the brown spots have mostly filled back in with green grass. The whole yard is just softer and healthier looking as a whole and I am so impressed. My neighbors even made a point to come ask what we did because it made that much of a difference that they wanted in on the action. We have been blessed with a week full of rain this week too so I'm sure the yard will continue to improve. I definitely reccomend this grass treatment! It was so easy to just fill the spreader and then water water water!
                                            • Recommended
                                            Showing 1-10 of 1,289 reviews

                                            Compare Similar Items

                                            current item

                                            Season Use


                                            Fall, Spring, Summer

                                            Fall, Spring, Summer

                                            Fall, Spring

                                            Compatible Grass Type

                                            All Purpose, Bent Grass, Bermuda, Bluegrass, Centipede, Fescue, Rye, St. Augustine (Floratam), Tall Fescue, Zoysia

                                            All Purpose

                                            All Purpose

                                            All Purpose, Bermuda, Bluegrass, Centipede, Fescue, Rye, Tall Fescue, Zoysia


                                            Water Soluble

                                            Quickly Greens, Starter Fertilizer

                                            Quickly Greens

                                            Controls Broad Leaf, Controls Crabgrass, Kills Clovers, Kills Dandelion

                                            N-P-K Ratio





                                            Delivery Method