20% off custom yard plans!

Code: JAN20

Heat Defense Granular 21-0-3 (12 lb)

One 12 lb bag covers up to 4,000 sq ft

LAWN PLAN EXCLUSIVE

Orange and green bag of Heat Defense Granular Fertilizer

Heat-season backup in one spread.

A 21-0-3 NPK granular fertilizer that improves water movement and moisture retention for steady greening and summer-season support, in one easy spread.

sunday-guarantee-badge

We're committed to making sure Sunday works for you and your home. Need a replacement? Or help troubleshooting an issue? Our experts are here for you. Learn more

Related products

LAWN PLAN EXCLUSIVE

Orange and green bag of Heat Defense Granular Fertilizer

Meet the granular built for hot, dry days

Exclusively available only in Sunday Lawn Plans

When temps rise and rain dips, this blend keeps your lawn on track. Premium ingredients support healthy growth and greener color, while the added surfactant helps water move into soil and reach roots more evenly, especially in arid regions. We also added leaf compost to support healthier soil. (Bet you didn’t know granular did that.)

One spread. One watering. Greener grass made simple. (We kept it humble. Your lawn won’t.)

The good stuff inside

  • Zero pesticide fertilizer —everything you need, nothing you don't
  • Universally loved by climates and grasses
  • Heat stress tolerance from potassium
  • Steady growth and green-up with nitrogen, calcium and sulfur
  • Builds organic matter from recycled leaf compost

How to use

Fill the spreader. Spread evenly for full coverage. Water in. Let dry. Go brag.

How soon will I see results with Heat Defense Granular?

With good moisture, you should notice a greener, thicker lawn in about 1 to 2 weeks.

Is Heat Defense Granular safe for all grasses?

Sure is. While designed with the arid West in mind, this product can be used on any lawn or grass type.

When should I apply Heat Defense Granular?

Late spring is prime time, right before summer heat. You can also use it ahead of a forecasted dry spell.

Will Heat Defense Granular let me water less?

No. It improves water movement and soil moisture behavior but does not reduce irrigation needs. To reduce watering needs, add Sunday’s Drought Defense into your normal routine. You can use it alongside any Sunday lawn fertilizer, liquid or dry.

Trending items

Sunday reusable pouch and sprayerSunday reusable pouch and sprayer

Sunday Herbicide Pouch + Sprayer

$10

Shipping box

Free Shipping!

Cool-Season

Bag of Sunday Fescue Rescue, a tall fescue grass seed blendBag of Sunday Fescue Rescue, a tall fescue grass seed blend

Fescue Rescue Grass Seed

$31

starstarstarstarstar

(42)

Shipping box

Free Shipping!

Sunday Mosquito Deleto pest control yard spraySunday Mosquito Deleto pest control yard spray

Mosquito Deleto Mosquito Spray for Yards

$27

starstarstarstarstar

(716)

Shipping box

Free Shipping!

Bag of Sunday Shade Select, a fescue, ryegrass, bluegrass seed blendBag of Sunday Shade Select, a fescue, ryegrass, bluegrass seed blend

Shade Select Grass Seed

$31

starstarstarstarstar

(36)

Shipping box

Free Shipping!

Green Lawn Fertilizer Hose SprayerGreen Lawn Fertilizer Hose Sprayer

Replacement Lawn Sprayers (2-Pack)

$5

Shipping box

Free Shipping!

Sunday handheld seed spreaderSunday handheld seed spreader

Chapin 1.5L Handheld Seed Spreader

$19

starstarstarstarstar

(1)

Shipping box

Free Shipping!

Sunday granular fertilizer products on lawn

Granular Lawn Fertilizer Instructions

Our dry granular lawn fertilizers are formulated for long-lasting growth and easy application. Learn how to apply granular lawn fertilizer correctly and get expert tips for your greenest lawn yet.

Read article

Customer reviews

We’re looking for stars!
Let us know what you think