About Suståne Natural & Organic Fertilizer
Suståne is an organic fertilizer brand made in the USA. Its lawn and garden products are built around composted, biologically active ingredients and slow-release nutrients, so they feed steadily instead of relying on fast-acting synthetic salts. Every product in this collection is OMRI Listed for organic use, a USDA Certified Biobased Product, and made in the USA.
Eartheasy carries the home-and-garden bags of the Suståne line: a corn gluten weed-and-feed, an organic turf starter, and a concentrated compost soil builder. Below is a quick guide to which one you need.
Suståne products in this collection
Corn Gluten Granulated Organic Fertilizer (9-0-0): A certified-organic, non-GMO corn gluten meal that works as a natural weed and feed. Applied in early spring and fall, corn gluten acts as a pre-emergent that helps stop broadleaf weeds like crabgrass and dandelion from establishing, while its slow-release nitrogen greens up and thickens the lawn. Granulated and screened for even, easy spreading. Sold as a 30 lb bag that covers up to 5,000 square feet.
Organic Turf Starter Fertilizer (4-6-4): A compost-based starter fertilizer built for new and overseeded lawns. It is a blend of aerobically composted turkey litter, feather meal, and sulfate of potash, with higher phosphorus (the middle "6") to support root establishment, and it is formulated to be applied right alongside grass seed without burning. Use it in late summer or spring when seeding or overseeding to crowd out weeds with dense, healthy grass, and it also works as an all-purpose fertilizer for vegetable and flower beds. Sold as a 30 lb bag that covers up to 5,000 square feet.
Organic Concentrated Compost (2-2-2): Real compost, dried and screened into a concentrated dry form that is easy to store and spread. It is both a high-quality compost and a gentle organic fertilizer: use it to rebuild raised-bed soil, enrich potting mixes, and restore depleted garden beds with stabilized organic matter, beneficial soil microbes, and balanced nutrients. Sold as an 18 lb bag.
Which Suståne product should you use?
To stop weeds and feed an established lawn, use Corn Gluten 9-0-0 in early spring and fall. To start a new lawn or overseed bare spots, use Turf Starter 4-6-4 in late summer or spring, applied with seed. To build and enrich garden or raised-bed soil, use Concentrated Compost 2-2-2 anytime you plant or top-dress.
All three are organic and slow-release, so they release their nutrients gradually rather than scorching plants the way fast-acting synthetic fertilizers can.
How to apply Suståne fertilizer
The lawn products are granular, so a standard broadcast or drop spreader is all you need; the concentrated compost can be dug into soil or applied around plants by hand. The corn gluten and turf starter are applied to established or newly seeded lawns and watered in. Because these products are compost-based or slow-release, they feed gradually over weeks, so you feed less often than with fast-acting synthetic fertilizers. Always check each product's bag for the exact application rate per 1,000 square feet for your situation.
Frequently Asked Questions
What is in Suståne fertilizer?
It depends on the product. The Corn Gluten 9-0-0 fertilizer is made from non-GMO corn gluten meal. The Turf Starter 4-6-4 is a blend of aerobically composted turkey litter, feather meal, and sulfate of potash. The Concentrated Compost 2-2-2 is a dried, screened compost made from aerobically composted turkey litter and contains beneficial soil microbes. All three deliver slow-release nutrients rather than synthetic chemical salts.
Is Suståne fertilizer organic?
Yes. The products in this collection are OMRI Listed for organic use and are USDA Certified Biobased Products. The corn gluten fertilizer Eartheasy carries is also certified organic and non-GMO.
When should I apply Suståne fertilizer?
For the corn gluten weed-and-feed, apply in early spring before weeds germinate (before soil temperatures reach 55 degrees Fahrenheit) and again in fall. For the turf starter, apply in late summer or spring when you are seeding or overseeding. The concentrated compost can be worked into soil any time you plant or want to rebuild a bed.
Will Suståne fertilizer burn my lawn?
The Turf Starter 4-6-4 is specifically formulated so it can be applied directly with grass seed without burning it. Suståne's lawn products are organic and slow-release, so they release nutrients gradually rather than scorching grass the way fast-acting synthetic fertilizers can. Always follow the application rate on the bag.
What does the NPK number mean (like 4-6-4)?
The three numbers are the percentages of nitrogen (N), phosphorus (P), and potassium (K). For example, the Turf Starter 4-6-4 is higher in phosphorus to help new grass roots establish, while corn gluten 9-0-0 is nitrogen-only to green up established turf.
Related collections
Looking for more ways to feed your soil? Browse Eartheasy's Natural Lawn Care products, our Composting supplies, or Raised Garden Beds to build out your growing space.
