At MySoil® we do not produce or manufacture fertilizer products, but rather connect DIY’ers to vetted products developed by vendors specifically for the DIY market. 

16-0-0 Double Dark blend will do just what the name implies, make your lawn double dark green, It's really that simple. The 16-0-0 Double Dark contains no phosphorus or potassium, but 25% Slow-release nitrogen and a nice 6% Iron with other micronutrients. Use when your soil test just recommends nitrogen or when you want to give your lawn a little extra color!  This fertilizer is a "hybrid", containing synthetic nutrient components as well as a natural organic base component called Bio-Nite. The Bio-Nite component feeds soil microbes and assists in building soil health. Formulated specifically for DIYers.

• One 45 lb bag covers up to15,000 sq ft
• Low:   3.0 lbs/1000 sq ft covers 15,000 sq ft
• Med:  4.0 lbs/1000 sq ft covers 11,250 sq ft
• High:  5.0 lbs/1000 sq ft covers 9,000 sq ft
• Analysis is 16-0-0 : N-P-K
• Contains 6% Iron + Bio-Nite™
• Contains micronutrients: magnesium, boron, copper, manganese, molybdenum, and zinc
• Great for greening up the lawn without too much growth or when recommended by a soil test

Product Description:
Double Dark contains 6% iron. There are very few granular fertilizers available that have this much iron in them. Iron is the key to that dark blue-green color, but Double Dark also contains 16% nitrogen because the iron won't work if the lawn isn't actively growing.

The nitrogen in 16-0-0 Double Dark isn't over the top, it's just respectable at 16% and, 25% of that N is slow-release. You will get some green from the Nitrogen, but it's not going to cause too much top growth. The nitrogen is really just there to stimulate intake of the Iron and other soil nutrients.

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 added to every bag of 16-0-0 Double Dark. Bio-Nite is the same thing as Milorganite, but comes out of South Florida instead of Milwaukee. The included Bio-Nite is feeding microbes in the soil every time you apply!

Application Information:

You can apply 16-0-0 Double Dark when your soil test recommends or when you just need a little more color and growth. 16-0-0 Double Dark 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.

Product Resources:

• Label: 16-0-0 Double Dark PDF Label
• Package Includes: 1 - 45 lb. bag
• Storage: Store in dry conditions away from moisture. Can be stored for up to 2 years.