Lawn fertilizer

Shop lawn fertilizer for a greener, healthier yard

Growing a lawn you love starts with the right nutrition. Whether you're filling in bare spots, boosting color, or building long term soil health, Sunday's lawn fertilizer lineup has you covered.

Choose from fast acting liquid formulas like Grass Machine Liquid Fertilizer and Grass Powerhouse Liquid Fertilizer, or slow release granular lawn fertilizer options. All made with nutrients like nitrogen and potassium, plus ingredients from nature like seaweed, molasses, and soy protein. Explore our full collection to find what your yard needs.

Why choose Sunday lawn fertilizer

Sunday lawn fertilizers are formulated without pesticides and designed to be better for people, pets, and the planet. Here's what each product brings to your yard:

• Core Endurance Granular Lawn Fertilizer: Delivers slow release nutrition that feeds your lawn for weeks, keeping grass thick and green longer
• Core Seagreen Granular Lawn Fertilizer: A seaweed based formula that builds soil health from the ground up for stronger roots and better growth
• Iron Boost Liquid Fertilizer: Gives your lawn a quick hit of iron for deep, rich green color you'll notice in days
• Lawn Starter Liquid Fertilizer: Jumpstarts new lawns and freshly seeded areas so grass establishes faster
• Potassium Boost Liquid Fertilizer: Strengthens roots and helps your grass handle heat and drought without wilting
• Lawn Strong Liquid Fertilizer: Delivers key nutrients for thick, resilient grass that bounces back from foot traffic and stress

Ready to give your lawn what it needs? Pick the fertilizer that matches your goals and see the difference real nutrition makes.

Tips for using lawn fertilizer

Timing matters when it comes to feeding your lawn. The best time to fertilize lawn is during active growth in spring when your grass is waking up, and again in fall to prepare roots for winter. Avoid fertilizing during extreme heat or drought when grass is stressed.

Here's how to get the most from your lawn fertilizer:

• Apply on a dry lawn, then water lightly afterward to help nutrients soak into the soil
• Liquid lawn fertilizer hooks right up to your hose for even coverage across your entire yard
• Granular fertilizers feed your lawn steadily over several weeks, so you're not scrambling to reapply
• Plan for 3 to 4 applications per growing season for the best results
• A soil test helps you understand your lawn's exact nutrient needs so you're not guessing

Want to take the guesswork out of your lawn care schedule? Build a custom lawn plan and we'll tell you exactly what to apply and when.

Lawn fertilizer FAQs

Do I need a different lawn fertilizer for spring and fall?

Your lawn's needs change with the seasons. In spring, look for a nitrogen rich lawn fertilizer to jumpstart greening and growth. In fall, choose a formula with more potassium to strengthen roots before winter. A nitrogen rich liquid formula is great for spring greening, while a potassium focused fertilizer helps your lawn prep for colder months.

What is the difference between liquid and granular lawn fertilizer?

Liquid lawn fertilizer delivers fast acting nutrients and applies easily with a hose end sprayer for quick results. Granular lawn fertilizer releases nutrition slowly over several weeks, providing extended feeding. Both work great. Want greening fast? Go liquid. Want steady feeding over weeks? Go granular.

What ingredients should I look for in a lawn fertilizer?

Look for ingredients that feed the soil, not just the grass. Sunday lawn fertilizers use seaweed, molasses, soy protein, and humic acid to build healthy soil and promote strong root growth. Avoid products loaded with harsh chemicals or synthetic pesticides. Ingredients from nature deliver real nutrition without the downsides.

Can I fertilize my lawn and seed at the same time?

Yes, you can seed and fertilize at the same time. A starter fertilizer designed for new lawns can support seed germination and root development. Apply both, water well, and avoid mowing until your new grass is at least 3 inches tall.

How do I choose the right lawn fertilizer for my grass type?

Start with a soil test to understand what your lawn actually needs. From there, match the product to your goal. An iron rich liquid fertilizer works well for warm season grasses that need deeper color, while a seaweed based granular formula builds soil health for any grass type. A Sunday custom lawn plan takes the guesswork out by recommending products based on your location and grass.

Not sure where to start? Build a custom lawn plan tailored to your yard.