12-12-12 Starter Fertilizer is your go-to fertilizer for seed, sod, or general feeding — formulated specifically for DIYers. Starter Fertilizer fixes everything!
Product Description:
The Yard Mastery Starter Fertilizer contains 12% nitrogen using premium ammonium sulfate, which brings a rich blue-green color to turf and interacts well with the other elements in the blend.
This blend also contains 12% phosphorus to support strong root development in existing lawns and new seed, sod, or plugs. The 12% potassium comes from sulfate of potash, a premium low-salt-index source. Every Yard Mastery blend includes 3% iron and essential micronutrients including boron, copper, manganese, molybdenum, and zinc.
All-Natural Bio-Nite™ in Every Bag! Bio-Nite is a bio-solid filler included in every Starter Fertilizer bag. It has a distinct smell — the smell of success! This odor tells you the Bio-Nite is feeding beneficial soil microbes with every application.
Check out this video for more information:
*Size options and coverage:
(1) 18 lb bag = covers up to 6,000 sq ft
(1) 45 lb bag = covers up to 15,000 sq ft
Application Information:
You can apply Starter Fertilizer when seeding or sodding, but it’s also ideal for anyone looking for an all-in-one macro blend. If your soil test shows low nitrogen, phosphorus, and potassium, this is an excellent choice.
Starter Fertilizer can be applied at any time during the growing season for:
| Coverage |
18 lb bag covers 6,000 sq ft 45 lb bag covers 15,000 sq ft |
| Application Details |
Apply at 3 lbs per 1,000 sq ft Reapply every 30–45 days |
| Water-In Instructions |
Apply to a dry lawn and water within 48 hours with 1/4" of irrigation or rainfall Sweep excess product off hard surfaces to avoid staining |
Product Resources:
| Shipping Costs |
Included for most U.S. states NO P.O. Boxes $9.95 for CA, ID, MT, NV, OR, UT, and WA |
| State Restrictions |
Alaska (AK), Hawaii (HI), and Michigan (MI) |
| Stickers |
Yes, free stickers with every order |
| Typical Delivery Time |
4–7 business days |
| Product Type |
Granular |
| Cancel | Return | Exchange |
All sales are final; no cancellations, returns, or exchanges |
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