16-0-0 Double Dark  6% Iron - Bio-Nite - Granular Lawn Fertilizer
SKU: 883053743

16-0-0 Double Dark 6% Iron - Bio-Nite - Granular Lawn Fertilizer

Sale price$40.49 Regular price$44.99
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Description

16-0-0 Double Dark 6% Iron - Bio-Nite - Granular Lawn Fertilizer16 0 0 Double Dark blend will do just what the name implies: make your lawn double dark green. It's really that simple green and more green. One 45 lb bag covers 15,000 sq ft Analysis is 16 0 0:: N P K, plus 6% iron Contains Urea for a darker green color Great for greening up the lawn but wont flush it with too much growth Product Description: First off, let's just point out that Double Dark contains 6% iron. There are very few granular fertilizers

16-0-0 Double Dark blend will do just what the name implies: make your lawn double dark green. It's really that simple - green and more green.

  • One 45 lb bag covers 15,000 sq ft
  • Analysis is 16-0-0:: N-P-K, plus 6% iron
  • Contains Urea for a darker green color
  • Great for greening up the lawn but won’t flush it with too much growth

 

Product Description:
First off, let's just point out that Double Dark contains 6% iron. There are very few granular fertilizers available that have this much iron in them. We all know that iron is the key to that dark blue-green color, but...Double Dark also contains 16% nitrogen because one thing that so many people forget is that iron won't work if the lawn isn't actively growing.

Think about it: the lawn has to be growing in order to take in nutrients and what element stimulates growth? Answer: Nitrogen The secret to Double Dark is that the nitrogen and the iron are working together. Search around and you will hear people who say, "I was using Ironite but after a while, it just stopped working." That is because there is no nitrogen in that product to keep things growing.


The nitrogen we put in Double Dark Blend isn't over the top - it's just respectable at 16% and, one-quarter of that N is slow release. You will get some green from the N too, but it's not going to smack your lawn in the face and make it flush out a bunch of top growth. The nitrogen is really just there to stimulate intake. 

You can also apply Double Dark in between your regular fertilizer applications if you just feel like you want to sling some fert!

For Warm-season turf will benefit from sustained “spoon-feeding” monthly in summer with this product.

Cool-season turf will benefit from added color without a strong surge from too much N.

 

All-Natural Bio-Nite™ in Every Bag!
Bio-Nite is a bio-solid filler we add to every bag of Double Dark Fertilizer. Bio-Nite is the same thing as Milorganite, but instead of being sourced in Milwaukee, it comes from South Florida. We can tell you that it “smells like a whole lot of success!” The good news for you is that the smell tells you that the included Bio-Nite is feeding microbes in the soil every time you apply and they love it!

 

Application Information:
Double Dark Fertilizer Blend can be used on the following grasses:

Cool Season Lawns - Kentucky Bluegrass, Turf Type Tall Fescue (all fescues), Ryegrass.
Warm Season Lawns - Bermuda, St Augustine, Zoysia, Centipede, Bahia.

 Coverage

A 45 lb bag covers 15,000 square feet

Application  Details

Apply at 3 lbs per 1,000 square feet of lawn area


Apply every 30-45 days


Can be applied at any time during the growing season for both cool and warm-season lawns

Water-In  Instructions

Apply to a dry lawn, and water into turf within the first 48 hours with 1/4" of rainfall or irrigation


Sweep excess off sidewalks and driveways to avoid staining

 

Product Resources:

Shipping costs

Included for most states within the U.S.


NO P.O. Boxes

State Restrictions

AK, HI, CA, WA, ID, and OR

Stickers

Yes, free stickers with this item

Typical Delivery Time

4 - 7 business days

Product Type

Granular

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SKU: 883053743

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Danielle
Lowell, US
★★★★★ 3
Typos and confusing/missing information
Format: Paperback, Format: Paperback
I finished Domain 1 and it's okay. Things are explained well, but there are a lot of typos and strange formatting. The cover of the book says 2025-2026, but the spine of the book says 2024-2025. The way that the quiz questions are worded is confusing and sometimes repetitive. I had 2 of the same questions in a row in one section. I'm struggling to take some quizzes because the questions that are being asked do not reference any material from that section (or anywhere in the book so far). I feel like there is information missing in the sections because the quizzes have random terms that have never been mentioned. Example: D1: Essential knowledge questions I am being asked about estimation tools like story points, relative estimation, and planning poker. Nowhere in the book have those things been mentioned.
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Reviewed in the United States on July 23, 2025
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Lisa Costa
Omaha, US
★★★★★ 5
You got this! Focus on your education
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Excellent !
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Reviewed in the United States on January 25, 2026
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Tia Thompson
Pawtucket, US
★★★★★ 5
I passed!!! —Highly Recommend
Format: Paperback
Great study guide and structure tailored to the 4 domains that are in the CAPM Exam. I just passed the exam on my first try scoring above target in 3/4 categories and target in 1/4 categories. The online simulations was a great way to prepare for the exam. Highly recommend you purchase to pass the first try! (This and the PMBOK Guide 7th edition were the only study materials I used)
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Reviewed in the United States on May 20, 2025
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Amazbob
Fort Morgan, US
★★★★★ 5
Excellent intro to Crypto
Format: Paperback
Great book for learning about Crypto. I found it well balanced between technical and non-technical information. Love the video inserts to help mix up the learning media. I highly recommend this for people trying to understand the economic models of crypto, the history of crypto as well as the more technical information about how it works (which can be easily skipped if you like). I bought a couple of these for friends.
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Kayla Worschell
Massapequa, US
★★★★★ 5
GREAT BOOK
Format: Paperback, Format: Paperback
Before reading this book, I had no knowledge whatsoever about cryptocurrencies as I started reading through the book I learned about coins, tokens, decentralize systems. Everything you need to know about crypto NFT‘s futures and much more is in this book. The book is also extremely well structured has pictures and very detailed examples. It’s a must buy!
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Reviewed in the United States on January 14, 2025

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