Starter Lawn Fertilizer 15-20-10
Product Description
New grass needs more than water and sunlight. It also needs the right nutrients to develop deep roots, establish quickly, and grow into a thick, healthy lawn.
Lawn Synergy 15-20-10 Starter Fertilizer is formulated specifically for new seed, overseeding, and sod. Its high-phosphorus formula promotes early root development, while controlled-release nitrogen, iron, and micronutrients provide balanced nutrition during the critical establishment period.
👉 Stronger roots. Faster establishment. Professional-grade nutrition from day one.
Why Choose Lawn Synergy Starter Fertilizer?
- 15-20-10 starter formula: High phosphorus promotes strong early root development.
- Controlled-release nitrogen: Provides steady feeding during establishment.
- Iron & micronutrients: Support healthy color and vigorous growth.
- Designed for new seed, overseeding, and sod.
Application Rate
- 4–5 lbs per 1,000 sq. ft.
- Apply at the time of seeding, overseeding, or sod installation.
- Water in after application.
Perfect For
- New lawn installations
- Overseeding existing lawns
- New sod installations
- Repairing bare or thin areas
When to Apply
Apply at the same time you spread seed or install sod so nutrients are available as new roots begin to develop. Starter fertilizer is intended for use during establishment—not routine maintenance fertilization.
Product resources
Product Information & Resources
Everything you need to understand, apply, and reference this product.
Details & Specifications
| Active Ingredient | 15% Nitrogen - 20% Phosphorus - 10% Potassium |
|---|---|
| Lawn Types | Tall fescue, Bermuda, Zoysia, Kentucky bluegrass, St. augustine, Ryegrass, Centipede |
| Special Features | Contains 50%XCU Nitrogen, NuTrace Technology, Humic Acid, and pH soil buffers, which is a great starter fertilizer for grass seed. |
| Application Rate | |
| Time to Apply | Spring, Summer, Fall, Winter |
| Waiting Period to Seed | None |
| Delivery System | Granules |
| For Use In | Turf Grass |
| Brand | Lawn Synergy |
Spreader Settings
Documents & Labels
Frequently Asked Questions
What is starter fertilizer?
When to apply starter fertilizer?
Should I apply starter fertilizer when seeding or wait until it germinates?
Can I use starter fertilizer to aid in correcting phosphorus and potassium deficiencies?
When to put down starter fertilizer after overseeding?
Customer Reviews
Overall rating: 4.86 / 5 from 100 reviews.
AI Generated Review Summary
Lawn Synergy's 15-20-10 Starter Fertilizer helps new lawns establish quickly with strong roots and vibrant color. Customers report fast germination, improved lawn appearance, and satisfaction with the product's results and shipping.
Summary topics
- Lawn Establishment (18%): Based on many customers, the lawn product seems to have helped in getting their new lawn off to a good start.
- Product Results (10%): Customers raved about the fast delivery and great results they achieved with the starter fertilizer they purchased.
- Lawn Appearance (7%): Customers expressed satisfaction with how their lawn looks after using the fertilizers and grass seeds.
- Shipping Speed (10%): Customers appreciated the fast and prompt shipping of their orders, which was mentioned multiple times in the reviews.
Review topics: [].
Review highlights
- "From the fertilizers to the grass seeds, our lawn looks healthy and wealthy!" —
- "Fast delivery; great results!" —
- "I am very happy with my purchase my lawn is looking beautiful." —
Reviews
Great customer service
"Hi Tony and Pete, I have a 1 year old lawn with new sod. This is my first time using your product and I am very excited on the long journey ahead and the progress of the products that you make for the customers will make a difference. I am an outdoor guy and I love talking care of my own lawn, because know body can do it like you want it done. So that’s why I reach out to your company for help. Your customer service staff is amazing and I personally spoke to Maria she was very helpful and very knowledgeable and professional, that makes a difference over the phone. So as of now I have no photos to share, but I will in the near future. Remember always put your customers first before profit and they will always come back. Thank you, Tim Marshall"
My seed was spread and
"My seed was spread and fertilized the same day. Germination was so fast and it is a beautiful stand. I love it."
I have been using Lawn
"I have been using Lawn Synergy products for about 2 years. I'm on the subscription plan and it arrives when needed. Neighbors have said how good the lawn looks. It is the darkest green and thickest grass on the block!"
After using your product most
"After using your product most of the summer I have noticed a huge difference in color and thickness. Your advice and product are amazing"
Great results
"I used your product. High in nitrogen. Our grass turned out dark green. Just like I wanted itMy neighbors asked me how do I get my Yard so dark green?"
"always great product, I love this store."
Still waiting to see some
"Still waiting to see some sprouts from the seed. Only been about five days. Hope to see some action in the next few days. 🙏"
Not what I expected
"The grass has not grown. I don't know what the issue is because I spent a lot on good seed."
Loved it . Very noticeable
"Loved it . Very noticeable difference between my yard and my neighbors. Thank you"
Great results thus far.
"Great results thus far."
Q&A
- When do I reapply? I love the results already. I have St Augustine grass in east Texas
- You can reapply in 5-6 weeks. If your area, you can apply emerald 10-0-20 next.
- When do I reapply? I love the results already. I have St Augustine grass in east Texas
- Suggest applying fertilizer again in 6 weeks.
- I have a new sod lawn in North TX. I was going to apply this. Is now a good time? The law is established now and about two months old most areas and over a month old in others. I wanted to fertilize to help it grow its roots.
- Yes, this would be a great choice for new sod or new seed.
- Hello, As a DYI person, can this be applied to existing lawn ? I have Kentucky Bluegrass,my area is in Illinois . Thanks l
- I have Bermuda, but it worked well for me
- Can you add this the hole before you put in grass plug? If so, how much?
- Yes at 5lbs per 1,000 sqft would be ideal.