How to Apply Liquid Lawn Fertilizer With a Hose-End Sprayer (Rates and Timing)

Step 2: feed in the cool of the day

Spray in early morning or evening, ideally under 80 degrees. Feeding in the heat of the day is the single most common way people scorch an otherwise gentle liquid, especially with a high-nitrogen formula. Cool and calm is the goal.

Step 3: use the sprayer and overlap your passes

Most liquid lawn fertilizers, including the Simple Lawn Solutions Advanced 16-4-8 we use as the example here, come with a hose-end sprayer attached that meters the concentrate as you go. Connect the hose, set it to spray, and walk at a steady pace with each pass slightly overlapping the last. Striping almost always comes from uneven coverage, not the product.

Step 4: water it in (with one exception)

Most macro feeds, the 16-4-8, 28-0-0, 15-0-15, and 3-18-18 types, benefit from a light watering after application to move the nutrients to the roots. The exception is foliar iron: leave it on the blade for a few hours before any water so the leaf can absorb the color. Always check the product label.

Step 5: get the rate right

Liquids are easy to over-apply, and more is not better. Follow the label, and to translate that into ounces for your specific lawn, run it through the fertilizer calculator. Because a liquid feed lasts two to four weeks, plan on a lighter application every few weeks rather than one heavy hit.

Frequently asked questions

• How do you apply liquid lawn fertilizer? Attach the hose-end sprayer, apply to a dry, recently mowed lawn in the cool of the day, walk overlapping passes for even coverage, and water in lightly afterward for most feeds.
• Does liquid lawn fertilizer need to be watered in? Most macro feeds do, with a light watering to move nutrients to the roots. Foliar iron is the exception and should sit on the blade for a few hours first.
• What temperature is too hot to apply liquid fertilizer? Avoid applying much above 80 degrees or in the heat of the day, since that is when burn risk is highest. Early morning or evening is best.
• How often can you apply liquid fertilizer? Every two to four weeks during active growth. Liquids feed faster but for a shorter window than slow-release granular.

For the full lineup ranked by need, see the best liquid lawn fertilizer guide, and for a season-long plan, the liquid feeding schedule.