Fall Fertilizer 21-0-4
Covers 6,000 sq. ft.
The proper diet
Fall is the perfect time to fertilize your lawn and restore soil conditions. Natural Alternative® Fall Fertilizer 21-0-4 (application 4) is balanced for optimal turf feeding, containing sulfur and iron to achieve a deep, green lawn without excessive growths spurts or burning.
Key Features
Organic Nitrogen Formula: Slow-release nitrogen for steady, healthy turf growth without rapid spurts.
Fortified with Protilizer®: Enhances soil and root health for efficient water and nutrient absorption.
Eco-Friendly & Pet-Safe: Zero phosphorus to protect nearby waterways and ensure safety for pets.
Rich in Sulfur and Iron: Promotes a deep, lush green color in your spring lawn.
Ease of Use
Easy Application: Spread evenly across your lawn using a handheld or push spreader.
Best Time to Apply: Ideal for early fall application for more efficient nutrient uptake.
Coverage: One 20 lb. box covers up to 6,000 sq. ft., perfect for small to medium-sized lawns.
Naturally sustainable
Fall Fertilizer 21-0-4 contains Natural Alternative®’s Protilizer® Seed & Plant Activator, an organic plant supplement for healthier turf roots and more efficient nutrient uptake. Together, the nutrients in our fertilizer and the beneficial microbes in Protilizer® help your lawn grow thicker and greener without the use of phosphorus, which can cause harm to nearby waterways.
Product Information
Application Instructions
For Established Lawns: Apply in early fall at a rate of 3 lbs. of product per 1,000 square feet. Apply evenly with a calibrated spreader. 3 lbs. of this product per 1,000 square feet is equivalent to 0.63 lbs. of nitrogen per 1,000 square feet.
For Newly Seeded Lawns: Rake fertilizer into the upper inch of the soil before seeding. Water until the seed germinates and establishes. Continue with the remaining Natural Alternative® 5-Part Lawn Care System.
Download our spreader settings sheet to find proper settings for your spreader.
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Read More Know + Grow
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- Benefits of Core Aeration, Seeding, and Fertilizing Your Lawn
- Creating a safe yard for your pets.
Read Our Product Testimonials
I have applied the winter step a week ago. Also want you to know that my lawn has looked fantastic all season long and has never looked better. With your help and products I can say without reservation that my lawn is the envy of my neighbors and friends. Thanks for all of your help.
I recently moved into a townhouse community and my lawn was very thin and full of weeds. I wanted to go an organic route, and learned about Natural Alternative lawn and garden products through your website. After overseeding my townhouse lawn this past fall, and once again in the spring, and fertilizing using your 15-0-4 Small Lawn Fertilizer each time, my lawn is now healthy, and thick, with great color.
After using your fertilizer and with irrigation the lawn is healthier and maintaining it is much easier.