Late Spring Fertilizer 19-0-3
Applying fertilizer in the Spring helps keep your lawn green and lush
The proper Spring fertilizer to feed lawns
All-natural, organic-based Natural Alternative® Late Spring Fertilizer 19-0-3 (Application 2 of the five-part Natural Alternative® Lawn Care System) helps keep your lawn green and lush as consistently warmer temperatures heat up the soil. The nutrient combination feeds your lawn for late spring and minimizes quick growth spurts and frequent mowing, promoting even and hardy growth throughout the season. Our organic lawn fertilizer, best for late Spring, is blended with Protilizer®, a seed & plant activator exclusive to Natural Alternative® which strengthens roots and aids in nutrient and water uptake.
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 late spring application as consistently warmer temperatures heat up the soil.
Coverage: One 20 lb. box covers up to 6,000 sq. ft., perfect for small to medium-sized lawns.
Naturally sustainable fertilizer for Spring
Our Late Spring Fertilizer prepares your soil and turf for the upcoming summer heat, as well as the high foot traffic and drought conditions that can accompany the summer months. The zero-phosphorus content of this Spring fertilizer won’t contribute to algae blooms in nearby bodies of water, making Natural Alternative® fertilizer the more sustainable way to grow a lush lawn in the late Spring season.
Product Information
Application Instructions
For Established Lawns: Apply this zero-phosphorus fertilizer in late spring at a rate of 3 lbs. of product per 1,000 square feet. Apply evenly with a calibrated fertilizer spreader. 3 lbs. of this product per 1,000 square feet is equivalent to 0.57 lbs. of nitrogen per 1,000 square feet.
For Newly Seeded Lawns: Rake the fertilizer for late Spring 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 fertilizer spreader settings sheet to find proper settings.
Frequently Asked Questions
Late Spring Fertilizer 19-0-3 is an all-natural, organic-based fertilizer that is specially formulated for late spring lawn care. It is designed to keep your lawn green and lush by promoting even and hardy growth throughout the season.
A 20 lb. box of Late Spring Fertilizer 19-0-3 can cover up to 6,000 square feet of lawn.
Protilizer® is a seed and plant activator that is exclusive to Natural Alternative® products. It strengthens roots and aids in nutrient and water uptake, which promotes healthy growth and helps keep your lawn green and lush.
For established lawns, apply Late Spring Fertilizer 19-0-3 in late spring at a rate of 3 lbs. of product per 1,000 square feet using a calibrated fertilizer spreader. For newly seeded lawns, rake the fertilizer into the upper inch of the soil before seeding and water until the seed germinates and establishes.
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Read Our Product Testimonials
Best fertilizer I have used.
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 have the best looking lawn in the neighborhood, three years running.