Build better soil.
Grow a better lawn.
Thin topsoil is often why a lawn struggles. Organic Lawn Builder from MYCOguard adds rich organic matter to the top of your soil so grass roots can thrive, season after season. Certified organic, made in Kennett Square, PA.
Lab-tested by Penn State Extension
Why your lawn will love it
- Holds moisture for better drought resistance
- Denser, healthier grass that crowds out weeds
- No synthetic chemicals; safe for kids, pets and waterways
- Pairs well with light organic feedings
- Ideal when seeding or overseeding
Pricing
One 400 lb bag tops about ¼ acre. Pick delivered (you spread it) or delivered & spread (we do).
Standard
Certified organic soil builder
Best for building soil health for the long term
Plus
Standard bag pre-fed with organic blood meal
Best for building soil plus a steadier feed than spray-on fertilizer
How it compares
Most lawn products either feed the grass for a few weeks or require tons of material to build the soil. Organic Lawn Builder does both jobs with one light, delivered bag.
| Compare | Organic Lawn Builder | Synthetic quick-release fertilizer | Organic granular fertilizer | Bulk compost topdressing |
|---|---|---|---|---|
| How long it works | 2–3 years of gradual release* | A few weeks per application | A few weeks to a few months | Multiple years |
| Builds soil organic matter | Yes, 84.6% organic matter | No | Very little | Yes |
| Material for ¼ acre | One 400 lb bag | A small bag, reapplied several times a year | A small bag, reapplied several times a year | Roughly 4 tons for a ¼-inch layer |
| Typical cost for ¼ acre† | $600 delivered & spread, lasts 2–3 years | $220–870 per professional visit | About twice synthetic, per visit | About $1,200 delivered & spread ($570–2,200) |
| Nitrogen form | Over 90% slow-release organic | Mostly fast, water-soluble | Mostly organic | Varies by source |
| Runoff risk | Low; nutrients held in organic form | Higher; soluble nutrients can wash off | Low | Low to moderate |
| Certified organic | Yes | No | Varies | Varies |
What it really costs
Building soil with compost usually means ordering several truckloads and paying a crew to spread them. A standard ¼-inch layer over ¼ acre (10,890 sq ft) takes about 8.4 cubic yards — roughly 4 tons.
| Bulk topdressing, ¼ acre (national averages†) | Low | Average | High |
|---|---|---|---|
| Compost, 8.4 cu yd at $25 / $45 / $75 per yard | $210 | $378 | $630 |
| Delivery | $20 | $45 | $90 |
| Spreading labor at $40 / $90 / $180 per yard | $336 | $756 | $1,512 |
| Total, delivered & spread | $566 | $1,179 | $2,232 |
| Organic Lawn Builder, delivered & spread | $600 flat · one 400 lb bag | ||
Rent your lawn, or own your soil?
Synthetic fertilizer buys a few weeks of green. Organic matter builds the soil that keeps your lawn healthy for years. One is an expense you repeat; the other is an investment that grows.
Synthetic fertilizer
- Feeds the grass blade directly for a fast green-up
- Water-soluble nitrogen is used up or washed away within weeks
- Must be reapplied several times every year
- Does nothing for soil structure or soil life
- Year five looks like year one: the lawn stays dependent
Building soil health
- Improves soil structure so water soaks in and stays
- Feeds microbes and earthworms that release nutrients naturally
- Nutrients release over seasons, not weeks, with less runoff
- Deeper roots ride out heat and dry spells better
- Gains build on each other: denser turf crowds out weeds
Soil building is gradual: the payoff comes from repeating applications, not from a single season. Results vary with soil and weather.
Robotic mowers multiply the payoff
A robotic mower trims a little every day and leaves fine clippings that break down fast, returning up to ~25% of the lawn's yearly nitrogen and organic matter to the soil. Its wheels help work the compost in. Together, your lawn keeps feeding its own soil. See which robot fits your lawn →
The Zippy Lawnz soil program
- Organic Lawn Builder every 1–2 years, ideally with spring or fall aeration
- Daily electric robotic mowing that mulches clippings
- Organic feedings, or a Plus bag pre-fed with blood meal; never synthetic
Our delivery area
We deliver within 30 miles of Kennett Square, PA, covering most of Chester and Delaware counties, northern Delaware, and nearby Maryland and New Jersey.
Radius shown is a straight-line 30 miles from Kennett Square. Don't see your town? Call or text us; if you're close to the line, we'll do our best to reach you.
Meet the maker
From the Mushroom Capital of the World. MYCOguard founder Eric Toedter has done R&D for the mushroom industry since 2010 and is a go-to regional expert in compost, airflow and disease. Science-first compost, made by people who know soil. How the partnership started →
Why we carry it: Zippy Lawnz is committed to eco-friendly lawn care automation. We never use chemical fertilizers, and we never mow with gas. Organic Lawn Builder is the foundation of our organic program.
Learn the soil program
Questions
Where do you deliver Organic Lawn Builder?
Within 30 miles (straight line) of Kennett Square, PA — most of Chester and Delaware counties in Pennsylvania, northern Delaware, and nearby Maryland and New Jersey. We don't ship it. If you're close to the line, call or text us and we'll do our best to reach you.
How much lawn does one bag cover?
Each 400 lb bag tops about ¼ acre (roughly 10,000–11,000 sq ft). Bigger lawns just take more bags — we'll size it on a quick call.
What's the difference between Standard and Plus?
Standard is the certified-organic soil builder on its own — $300 delivered or $600 delivered and spread. Plus is the same bag pre-fed with organic blood meal for a full seasonal feeding — $600 delivered or $900 delivered and spread.
How long does it last?
Penn State Extension reports organic nitrogen in compost releases roughly 10–20% per year, and over 90% of this product's nitrogen is organic — so one application keeps working for about 2–3 years. We recommend reapplying every 1–2 years, ideally with spring or fall aeration.
Is it safe for kids, pets and waterways?
Yes. It's certified organic (by NuFiber), contains no synthetic chemicals, tested 0% plastic, metal or glass, with heavy metals far below EPA limits. Nutrients are held in organic form, so runoff risk is low.
Does it work with a robotic mower?
It's a great match. A robot mower trims a little every day and leaves fine clippings that break down fast, and its wheels help work the compost into the soil as it crosses the lawn day after day.
Certified organic by NuFiber. Analysis: Penn State Agricultural Analytical Services Laboratory, 2026 January batch (Lab ID C19594). N-P-K shown on a dry-weight basis; as sold: 1.4-0.3-0.7. *Penn State Extension reports that organic nitrogen in compost releases roughly 10–20% per year; over 90% of this product's nitrogen is organic. Comparisons describe typical product categories, not specific brands; results vary with soil, weather and application. †Industry averages: Lawn Love (Dec 2025) for professional fertilization; LatestCost (Oct 2026) for compost material ($25–75/yd), delivery ($20–90) and spreading labor ($40–180/yd). Local prices vary. Download the flyer (PDF).
Start building your soil today
$300 delivered · $600 delivered & spread · Plus +$300. Delivery within 30 miles of Kennett Square, PA.