BioBoost Organics Lawn Fertilizer

5-3-0 · 75% Slow-Release · Iron

Give your lawn better soil to grow in. BioBoost adds organic matter while providing gentle, slow-release feeding and iron to support healthy green color.

Select Size:

Not Sure?

Quantity:

Fast Shipping99% of orders ship same day

Proven ResultsProfessional-grade products

Made in the USAQuality ingredients

Expert SupportReal lawn experts to help

Feed Your Lawn. Improve Your Soil.5-3-0 + 2% Iron

Build Healthier Soil

Adds organic material to support better soil over time, especially where topsoil is thin or poor.

Gentle, Steady Feeding

Provides lower-nitrogen, slow-release nutrition without forcing a big flush of grass growth.

Support Greener Color

Iron helps support rich green color when your lawn needs it.

Great for Poor Soil

A helpful addition for sandy lawns and new-construction yards with limited organic matter.

Build Healthier Soil for a Better Lawn

BioBoost 5-3-0 is an organic-based lawn fertilizer designed to improve soil health while providing gentle, slow-release nutrition. It's ideal for lawns with poor soil, thin topsoil, or areas disturbed by new construction.

Why Choose BioBoost?

Builds Healthier Soil: Adds organic matter to help improve soil quality over time.
Gentle, Slow-Release Feeding: Nourishes your lawn without forcing excessive growth.
Richer Green Color: Contains 2% iron to support healthy lawn color.
Great for Poor Soil: Ideal for sandy soils, new-construction lawns, and areas lacking organic matter.

BioBoost focuses on long-term soil improvement rather than an immediate green-up. Use it as part of your regular lawn care program to help create better growing conditions for healthier grass.

Select Your Grass Type.

5-3-0 Fertilizer

Gentle nitrogen and phosphorus feeding without added potassium.

Builds Organic Matter

Adds organic material to low-quality soil for gradual improvement.

Slow-Release Feeding

Steadier nourishment without the same rapid growth push as high-nitrogen fertilizer.

2% Iron

Helps support rich green color when iron is needed.

Application Rate

Maintenance5 lb per 1,000 sq ft

Corrective10–15 lb per 1,000 sq ft

Equipment

Spread evenly with a broadcast spreader.

Apply at the Right Time

During active growth or when improving poor soil.

After Application

Water in after spreading.

Guaranteed Analysis

⌄

Total Nitrogen (N)5.0%

Available Phosphate (P₂O₅)3.0%

Soluble Potash (K₂O)0.0%

Iron (Fe)2.0%

Derived From:

Bio Solids, Urea, Grandol

Spreader Settings

⌄

Find the right starting setting for your spreader.

Spreader Manufacturer Spreader Model

Select your spreader to see the setting.

Select your goal in Find My Amount: 5 lb per 1,000 sq ft for routine maintenance, or 10–15 lb per 1,000 sq ft as a corrective soil-building treatment. The higher rate is not a routine feeding rate; apply only where appropriate based on soil needs and local phosphorus rules. Calibrate spreader settings for the selected rate and granule size.

Spreader settings & calibration guide →

Documents & Labels

⌄

Product Label

What is BioBoost 5-3-0 used for?

BioBoost is a low-nitrogen, slow-release fertilizer used to add organic material to the soil while providing gentle lawn nutrition. It is especially useful for poor soil, new-construction lawns, and summer applications.

Can I apply BioBoost during hot weather?

Yes, during your grass's active growing season when it has adequate moisture. BioBoost's lower-nitrogen, slow-release feeding makes it a useful option when you want gentle nutrition, but avoid applying to severely drought-stressed or dormant turf.

Will BioBoost burn my lawn?

BioBoost has a lower burn risk than fast-release, high-nitrogen fertilizers when applied correctly. Spread it evenly and follow the recommended application rate.

How much should I apply?

For routine lawn maintenance, apply 5 lbs per 1,000 sq ft. To build organic matter and improve poor soil, apply 10–15 lbs per 1,000 sq ft.

Which application rate should I choose?

Use 5 lbs per 1,000 sq ft when your lawn mainly needs gentle feeding and ongoing soil maintenance. Use 10–15 lbs per 1,000 sq ft when working with poor soil, low organic matter, or a new-construction lawn with minimal topsoil.

How does BioBoost help poor soil?

BioBoost adds organic material that can help low-organic-matter soil hold nutrients better over time. It's especially useful where the topsoil is thin, sandy, or disturbed. Improvements are gradual; BioBoost does not instantly fix compaction or replace missing topsoil.

Is BioBoost good for new-construction lawns?

Yes. New-construction properties often have thin, disturbed, or low-quality topsoil. BioBoost helps add organic material and supports the long-term improvement of those soils.

Will BioBoost make my lawn green quickly?

BioBoost provides gentle, steady feeding rather than a rapid growth surge. It is better suited for building soil health and maintaining color than producing an immediate green-up.

Can BioBoost replace my regular lawn fertilizer?

It can be part of a complete lawn program, but it may not provide enough nitrogen or potassium for every seasonal need. Use it as a soil-building treatment alongside other fertilizers when stronger growth or additional nutrients are needed.

Do I need to water after applying?

Watering after application helps settle the granules and begin releasing nutrients. You can also apply before light, steady rainfall when the product label allows. Follow the product directions.

Customer Reviews

Overall rating: 4.894737 / 5 from 19 reviews.

AI Generated Review Summary

Summary topics

Review topics: [].

Review highlights

Reviews

"Fantastic product! Was a Scotts person for years -"

— Alex (5/5)

Confused on this product!

"First, I have always had great success with Lawn Synergy products which is why I will continue to order them. This time I ordered Lawn Synergy Micronutrient Booster and was delivered Reed and Perrine Pro Series 5-3-0 Micronutrient. I assumed it was the same product and followed the instructions on the bag which called for a spreader setting of 5-5 1/2. Looking back on the webpage, the directions call for a spreader setting of 9. Did I under use this product or am I good? If I would have set to 9, would I have overused this product and possibly hurt my lawn. Some clarification on the site may prevent customer issues with this."

— Rick O. (4/5)

It's looking great I will

"It's looking great I will try it again"

— Carol B. (5/5)

I love the product

"Will this organic boost harm my dog"

— Edward P. (4/5)

Things are looking up just

"Things are looking up just hope we can get much needed rain to help with the watering process. I like the fertilizer that I have bought so far"

— Ron T. (5/5)

products and services

"I have been very impressed wtih the products I have put on the lawn, yielding almost a blue green (Tif 419). Tony has been so helpful with advice and very quick to respond to my questions. I have said you name to a neighbor who cares about your yard and will continue to people I talk with about grass. Thankful to have you!"

— Chris E. (5/5)

products and services

— Chris E. (5/5)

DparNC

"Good product. Lawn looks greener"

— Dennis P. (5/5)

Product was applied to

"Product was applied to my lawn this morning."

— Christopher (5/5)

Grass seed

"Still having used it, but I’m sure my lawn will look great with it"

— Walter D. (5/5)

Q&A

Can the Bio Boost 5-3-0 be used as my main fertilizer year round, or does it need to be in conjunction with Emerald or Almighty? Live in the Northeast and want a low nitrogen fertilizer.: This product is used and recommended as a soil corrective to add organics back into the soil. This should be used in conjunction with regular fertilizers and shouldn't be used year around. I would recommend a soil sample to see if this product is in need at your property.
I currently use Ferti Lome 15-0-15 as my go to fertilizer on my new Palisades Zoysia lawn in North Texas Dallas area, which was new sod in Oct 2024, and has grown in beautifully. I'm interested in this bio fertilizer 5-3-0. Question is, can I substitute the bio fertilizer 5-3-0 instead of using the 15-0-15? It's getting hard to keep up on what fertilizers and months to add and when not to add. Will the 5-3-0 fertilizer be used as my main fertilizer or do I need to use both? Any advice is much appreciated as my thumb isn't green yet.: Bioboost is great for building up the soil with organics. It can be used with a current fertilization program. We would suggest Emerald 10-0-20 at this time of the year on Zoysia unless you need more growth.
I have recently seeded my lawn with North Star grass seed and I used your starter fertilizer along with it. It’s been about 3 weeks and everything is coming in great. I’m wondering when I should apply fertilizer again and what kind do you recommend I use?: Great question. Apply Emerald at 5lbs per 1,000 sqft 6 weeks after applying starter to keep it going.
When is the best time of year to apply this for a tall fescue lawn in Virginia?: Anytime of year is good for this one! Thank you!
Are The Bio Solids used in some of the fertilizer formulas tested for PFAS and other known pollutants prior to packing and distribution? Does Lawn Synergy have standards for these measurements? Can the be made public?: 5-3-0 is regulated by the U.S. Environmental Protection Agency and the New Jersey Department of Environmental Protection. 5-3-0 is registered as a fertilizer by the New Jersey Department of Agriculture and is Labeled for turf and ornamental plant use. 5-3-0 is nearly water insoluble so there is less chance of the nutrients leaching into and polluting groundwater sources. This is especially important in Sandy Soils. The release of nutrients is very slow, being broken down through naturally occurring soil microorganisms. Our monitoring presently, is in preliminary studies. As stated previously, the state of New Jersey has not set parameters on PFAS for biosolids fertilizer on land applications.

Three bags of lawn care products from Lawn Envy, including North Star 20-0-10 fertilizer, displayed on a green grass surface against a dark green background.

Your Lawn Care Plan, Delivered Automatically

We take the guesswork out of lawn care. Get the right products shipped to your door at the right time.

Learn More