Liquid Lawn Feeding Schedule: Which Simple Lawn Solutions Product Each Season (2026)
James ThorntonLawn Equipment & Maintenance Expert | 20 YearsAs an Amazon Associate we earn from qualifying purchases.
The advantage of a liquid lineup is that you can match the formula to the season instead of feeding the same thing all year. Here is a simple liquid lawn feeding schedule that maps each Simple Lawn Solutions formula to the right part of the year, so you feed for color when you want growth and for hardiness when the lawn is under stress.
Not sure which formula does what? Start with the best liquid lawn fertilizer guide or the which one to buy comparison.
Spring: wake the lawn up
Once the lawn is actively growing, start with a balanced feed. Simple Lawn Solutions Advanced 16-4-8 is the all-purpose spring choice, delivering steady color and growth as the season ramps up.
If the lawn came out of winter pale and hungry, a Simple Lawn Solutions Maximum Green 28-0-0 gives a faster green-up to kick things off.
Summer: feed for hardiness, not just growth
As heat builds, shift toward stress tolerance. Simple Lawn Solutions Superior 15-0-15 is the summer workhorse, since its high potassium hardens the lawn against heat and drought without pushing tender growth.
When the color fades but you do not want more mowing, a Simple Lawn Solutions Liquid Iron deepens the green without a growth surge, which is exactly what summer lawns want.
Fall: prepare for dormancy and next spring
Heading into fall, the goal shifts to root strength and winter hardiness. Simple Lawn Solutions Ultimate 3-18-18 supports root vigor with its high phosphorus and potassium, which sets the lawn up to overwinter and come back strong. Taper off nitrogen as the season ends, especially on warm-season grass, so you do not push growth into the first frost.
Putting it together
A full-season liquid program looks like this: a balanced or high-nitrogen feed in spring, a potassium-forward 15-0-15 plus iron through summer, and a 3-18-18 in fall. Feed every two to four weeks during active growth, always on a dry lawn in the cool of the day, and use the fertilizer calculator to set the rate for your lawn size. Adjust the timing to your grass type and climate; the complete fertilizing guide has the regional details.
Frequently asked questions
- How often should you apply liquid lawn fertilizer? Every two to four weeks during the active growing season, since liquids feed for a shorter window than slow-release granular.
- What liquid fertilizer should I use in summer? A phosphorus-free 15-0-15 for heat and drought hardiness, plus liquid iron for color without extra growth.
- When should I stop feeding nitrogen in fall? Taper off as the season ends, especially on warm-season grass, so late growth does not get caught by frost. A 3-18-18 supports roots without a heavy nitrogen push.
- Can I use one liquid fertilizer all year? You can run a balanced 16-4-8 most of the season, but matching the formula to spring, summer, and fall gets better results.
For the full lineup ranked by need, see the best liquid lawn fertilizer guide.
Free Lawn Care Tools
Loading product recommendations...
Related Articles
- Fertilizing
Best Liquid Iron for Lawns: Darker Green Without the Extra Mowing (2026)
Jun 27, 2026•5 min readLiquid iron is the fastest way to a deep, dark green without triggering a mowing marathon. Here is when to use it, how to apply it, and the best picks.
Read article - Fertilizing
Best High-Nitrogen Liquid Lawn Fertilizer: Simple Lawn Solutions 28-0-0 (2026)
Jun 27, 2026•5 min readWhen the lawn is pale and hungry and you want color fast, high-nitrogen liquid is the lever. Here is how to use a 28-0-0 without overdoing it.
Read article - Fertilizing
Simple Lawn Solutions 16-4-8 Review: Results, Rate, and How to Apply (2026)
Jun 27, 2026•5 min readA hands-on look at the most popular liquid lawn fertilizer: what 16-4-8 actually does, how to apply it, and whether it earns a spot in your program.
Read article