Using a fertilizer spreader helps distribute granules evenly, so your lawn or garden gets the intended amount without concentrated patches. Before starting, identify the spreader type, read the fertilizer label, and check that the product is suitable for the area. The steps below apply to common broadcast and drop spreaders; follow the manufacturer’s instructions whenever they differ.
What You’ll Need
- A broadcast or drop fertilizer spreader in good working order
- Fertilizer labeled for your lawn, plants, and spreader type
- The product label’s application rate and spreader-setting guidance
- A measuring scale or container if you need to measure the product
- Gloves, eye protection, and any other protective equipment directed on the label
- A broom or blower for cleaning up granules from hard surfaces
Step-by-Step
- Read the fertilizer label first. Confirm the product is appropriate for the plants and site, and note the application rate, any watering instructions, and precautions. Check whether it is a regular granular fertilizer or a combination product such as weed-and-feed, which may have specific timing and use restrictions. Do not exceed the labeled rate.
- Check the weather and prepare the area. Avoid spreading in strong wind, which can carry granules onto paths, neighboring property, or sensitive plants. Follow label guidance on rain and irrigation. Mow or clear debris first if appropriate, and keep children and pets away for the period stated on the label.
- Inspect and clean the spreader. Make sure the hopper, gate, wheels, agitator, and controls move freely. Remove residue from a prior product, especially if switching between fertilizer and seed or another treatment. A clogged or contaminated spreader can cause uneven application or damage plants.
- Find the correct rate and setting. Use the setting recommended on the fertilizer bag for your spreader model. Settings are not universal: numbers differ between brands and models. If no setting is listed, consult the spreader manufacturer’s guidance or calibrate the spreader using its manual. Do not guess and then compensate by walking faster or slower.
- Measure the product for the area. Work out the area to be treated and measure only the amount allowed by the label. For a rectangular area, multiply length by width; split an irregular lawn into smaller shapes and add their areas. Check that your planned quantity matches the package rate. If the amount seems too large or too small, recalculate before filling.
- Choose a safe filling spot. Fill the hopper on a tarp or other contained surface, away from drains, water, and planted beds. Wear the protection specified by the label, avoid breathing dust, and do not fill over a hard surface where spills can wash away. Keep the spreader gate closed while loading.
- Set up a consistent route. For a broadcast spreader, plan parallel passes with a slight overlap, following the manufacturer’s suggested swath width. For a drop spreader, align passes closely so there are no untreated strips. On a lawn, start around the perimeter if that helps you maintain an even pattern, but keep granules away from flower beds and water features.
- Start moving before opening the gate. Position the spreader at the start of a pass, begin walking at a steady pace, then open the feed control. Close it before stopping, turning, or crossing a section that should not receive fertilizer. This prevents piles caused by releasing product while stationary. Keep the spreader moving at a consistent walking speed.
- Make the planned passes. Walk straight lines and maintain the same pace and overlap throughout. Keep the spreader level where possible. Avoid sharp turns with the gate open, and do not spread onto sidewalks, driveways, storm drains, or water. If the label calls for separate applications in different directions, apply each portion as directed rather than doubling the full rate.
- Finish and clean up immediately. Close the gate before the hopper is empty if you need to stop, then account for any product left over. Sweep granules from hard surfaces back onto the treated area only if doing so will not exceed the rate; otherwise collect and dispose of them as the label directs. Do not wash fertilizer into a drain. Follow the label for watering in, and clean the spreader over a contained area without contaminating waterways.
- Store the product and equipment safely. Keep fertilizer in its original labeled container, tightly closed and dry, away from food, children, and pets. Let the spreader dry fully and store it as the manual recommends. Wash hands and exposed skin after handling the product.
Common Mistakes
- Using a guessed setting: A setting that works for one product or spreader may be wrong for another. Check the bag and equipment manual, then calibrate if needed.
- Applying too much: Extra fertilizer does not necessarily improve results. Overapplication can burn plants and increase runoff into waterways. Measure the area and product, and never exceed the label rate.
- Stopping with the gate open: This leaves a concentrated pile that can damage turf. Close the gate before stopping or turning.
- Ignoring wind or uneven pacing: Wind shifts granules, while changing speed changes how much falls in each area. Choose calmer conditions and walk steadily.
- Leaving granules on pavement: Rain can carry them into storm drains. Sweep up spills promptly and follow label directions for disposal.
Tips
- For a new product or unfamiliar spreader, calibrate over a measured test area using a safe, contained surface and the manufacturer’s procedure. Adjust only as directed, then recheck the rate.
- Mark pass lines with lawn features or temporary markers to help maintain consistent spacing.
- Keep a note of the product, date, treated area, and spreader setting. This makes future applications easier to reproduce.
- If the label recommends split applications, divide the measured amount and apply each portion in the specified pattern. Do not apply the full amount twice.
- Use a drop spreader near narrow edges or sensitive borders when its controlled pattern is suitable, while still following the product label and keeping fertilizer off unwanted areas.
Troubleshooting
- Granules are not coming out: Close the gate before inspecting. Check for damp, caked fertilizer, a blocked opening, or a jammed agitator. Empty and clean the spreader according to its manual; do not reach into moving parts.
- The application looks streaky: Check that the spreader is level, the wheels and feed mechanism work, and your walking speed and pass overlap are consistent. Recheck the setting and calibration. Do not add another full application over the area; use the label’s advice or contact the manufacturer if the rate is uncertain.
- There is a pile or spill: Keep people and pets away. Collect loose granules promptly and follow the label for cleanup. If plants receive a concentrated dose, consult the product label or manufacturer about whether watering is appropriate; do not assume flushing is safe in every situation.
- Fertilizer blows off course: Stop and close the gate. Wait for calmer conditions, then inspect and clean any affected hard surfaces or areas according to the label. Avoid directing material toward drains, water, or sensitive plants.
- The spreader setting is unavailable: Look up the exact spreader model and product guidance, or use the spreader manual’s calibration method. If you cannot verify a safe application rate, wait rather than estimating.
Frequently Asked Questions
Should I use a broadcast or drop spreader?
A broadcast spreader covers a wider area and suits open lawns, but its granules travel beyond the wheel path. A drop spreader places product more narrowly and can help around borders. Choose based on the site and product directions.
Can I use fertilizer when the grass is wet?
It depends on the product label. Wet foliage may cause some products to stick and burn plants, while certain products specify damp conditions. Follow the label rather than applying a general rule.
How do I know how much fertilizer to put in?
Calculate the area, then use the label’s application rate to measure the amount. The spreader setting controls delivery; it does not replace measuring the correct total quantity.
Can I spread fertilizer before rain?
Check the label’s rain and watering instructions and the forecast. Heavy rain can wash fertilizer away and increase runoff, so avoid applying when conditions could carry granules into drains or waterways.
Can I leave fertilizer in the spreader?
It is better to empty and clean the spreader after use. Moisture can make granules clump or corrode equipment, and leftover product can affect the next application.
What should I do if I apply too much?
Consult the product label or manufacturer promptly for product-specific advice. Keep people and pets away as directed, prevent granules from reaching drains or water, and do not apply more fertilizer to correct the problem.