Scotts® Turf Builder® Triple Action is a popular 3-in-1 lawn treatment designed to simplify lawn care. It combines fertilizer, weed killer, and crabgrass preventer in a single product. When applied correctly, it can feed grass, kill existing weeds like dandelions and clover, and prevent new weeds from germinating.
Understanding the right timing, weather conditions, and application method is essential for the product to work effectively. In this guide, you’ll learn exactly when and how to apply Scotts Triple Action for best lawn results.
What Scotts Triple Action Does?
Scotts Triple Action is called a “3-in-1 lawn care product” because it performs three functions at once.
1. Fertilizes the Lawn
The fertilizer component feeds grass and promotes thicker, greener turf growth.
2. Kills Existing Weeds
It targets common broadleaf weeds including:
- Dandelion
- Clover
- Chickweed
- Plantain
- Ground ivy
3. Prevents Crabgrass
The pre-emergent ingredient helps stop crabgrass and other grassy weeds from germinating for up to 4 months.
Because it combines several lawn treatments in one product, Scotts Triple Action is often used as the first fertilizer application of the spring season.
When to Apply Scotts Triple Action
Timing is the most important factor for success.
1. Early Spring (Best Time)
The ideal time to apply Scotts Triple Action is early spring when grass begins actively growing and weeds start appearing.
Signs it’s the right time:
- Daytime temperatures consistently 60–80°F (15–27°C)
- Dandelions begin flowering
- Lawn has started turning green after winter
Applying during this window allows the product to kill existing weeds while preventing crabgrass before it germinates.
Another common recommendation is to apply it before the third or fourth mowing of the season.
2. Early Fall (Optional Second Application)
A second application can be made in early fall to control weeds that germinate in cooler weather.
Fall benefits:
- Controls fall weeds like clover
- Strengthens lawn before winter
- Improves next spring’s lawn growth
However, many lawn care programs apply Triple Action only once in spring, then use regular fertilizer later in the season.
Best Weather Conditions for Application
Applying lawn products during the right weather conditions increases effectiveness.
Ideal Conditions
- Temperature: 60–80°F
- Light dew or slightly moist grass
- Calm weather with little wind
- No rain expected for 24 hours
Moist grass helps the granules stick to weed leaves, which improves weed control. (Scotts)
Conditions to Avoid
Do not apply when:
- Heavy rain is expected
- Lawn is drought-stressed
- Grass is dormant
- Wind is strong
Heavy rain can wash fertilizer away before it works.
How to Apply Scotts Triple Action (Step-by-Step)
Applying Scotts Triple Action properly ensures even weed control and fertilization.
Step 1: Mow the Lawn First
Mow your lawn 1–2 days before applying the product.
Why this helps:
- Exposes weeds to fertilizer
- Allows granules to reach the soil
- Improves distribution
Do not mow immediately after application.
Step 2: Ensure Grass is Slightly Wet
For best results, apply the fertilizer when grass is wet from morning dew or light watering.
Moisture helps the weed killer portion stick to weed leaves.
Step 3: Fill a Lawn Spreader
Use a lawn spreader to distribute the granules evenly.
Recommended spreaders:
- Broadcast spreader
- Rotary spreader
- Drop spreader
Typical spreader settings recommended by the manufacturer include:
- Broadcast spreader: about 3¼
- Drop spreader: about 6
Always check the product bag for exact settings.
Step 4: Apply Evenly Across the Lawn
Walk in straight rows while spreading fertilizer.
Best technique:
- Apply half the product going north–south.
- Apply the rest going east–west.
This cross-pattern helps ensure uniform coverage.
Step 5: Wait 24 Hours Before Watering
Do not water or mow the lawn for 24 hours after application.
After that:
- Water the lawn lightly
- This helps activate the crabgrass prevention barrier in the soil.
- 3-IN-1 FORMULA: Scotts Turf Builder Triple Action1 is a three-in-one lawn fertilizer and weed control formula that kills listed lawn weeds, prevents crabgrass, and feeds grass to build thick, green lawns
- WHERE TO USE: This grass fertilizer, crabgrass preventer, and clover and dandelion killer for lawns is for use on Bahiagrass, Centipedegrass, Kentucky Bluegrass, Perennial Ryegrass, Bermudagrass, Tall Fescue, Fine Fescue, and Zoysiagrass
- LAWN WEED CONTROL: This lawn care product is a weed killer for lawns that controls dandelion, clover, dollarweed, ground ivy, chickweed, plantain, henbit, English daisy, and other listed lawn weeds
- CRABGRASS PREVENTER: This pre-emergent weed killer also prevents crabgrass for 4 months (will not kill existing crabgrass); stops other listed grassy weeds from invading your lawn
- HOW TO USE: Apply to a wet lawn with a Scotts spreader, then water in after 24 hours; apply in early spring when dandelions are actively growing
- WHEN TO APPLY: Apply pre-emergent weed killer plus lawn fertilizer to a dry lawn when temperatures are consistently between 60°F and 90°F for best results
- TRIPLE ACTION FORMULA: Designed to be used when planting new grass, Scotts Turf Builder Triple Action Built For Seeding prevents dandelion and crabgrass for up to 6 weeks without harming new grass, jump starts grass development, and strengthens new grass
- WEED PREVENTION: This dandelion and crabgrass preventer prevents other listed bothersome lawn weeds including clover, chickweed, ground ivy, henbit, and nutsedge; new weeds will sprout white or turn white and quickly die; will not kill existing weeds
- GRASS TYPES: A weed preventer and lawn food for grass to use on newly seeded, overseeded, or newly planted Kentucky Bluegrass, Tall Fescue, Perennial Ryegrass, Centipedegrass, and Fine Fescues
- COVERAGE: One 17.2 lb. bag of Scotts Turf Builder Triple Action Built For Seeding covers 4,000 sq. ft.
- Up to 2X more powerful dandelion and clover control (vs. previous formula)
- Clears out dandelions and clover—satisfaction guaranteed
- Weedgrip Technology grips the weeds you see—and the ones you don’t
- Scotts most powerful weed and feed
- Feeds to thicken lawns and crowd out weeds
How Much Scotts Triple Action to Use
Application rates depend on the lawn size.
Typical coverage examples:
| Bag Size | Coverage |
|---|---|
| 11.3 lb bag | ~4,000 sq ft |
| 33.9 lb bag | ~12,000 sq ft |
Always follow the exact label rate to avoid fertilizer burn.
How Often to Apply Scotts Triple Action
Scotts Triple Action is usually applied once per season, but it can be used up to twice per year.
Typical lawn care schedule:
| Season | Product |
|---|---|
| Early Spring | Scotts Triple Action |
| Late Spring | Lawn fertilizer |
| Summer | Lawn fertilizer |
| Fall | Fall lawn food |
After applying Triple Action, you can apply another fertilizer such as lawn food 6–8 weeks later.
How Long It Takes to Work
Most homeowners begin seeing results within 1–2 weeks.
Expected timeline:
- 3–7 days: grass begins greening
- 7–14 days: weeds start dying
- 4 months: crabgrass prevention barrier remains active
Results depend on:
- Weather
- Lawn health
- Weed type
Lawn Types Compatible with Scotts Triple Action
This fertilizer works well on many common turf types, including:
- Kentucky bluegrass
- Perennial ryegrass
- Tall fescue
- Fine fescue
- Bermudagrass
- Zoysiagrass
- Centipedegrass
However, it should not be used on certain grasses such as:
- St. Augustinegrass
- Bentgrass
- Dichondra
Always check the product label for compatibility.
Important Safety Tips
When applying any fertilizer or weed control product, follow safety precautions.
Protect Plants
Avoid spreading granules onto:
- Flowers
- Shrubs
- Vegetable gardens
The herbicide ingredients can damage non-grass plants.
Protect Waterways
Do not apply fertilizer:
- Near storm drains
- Near lakes or streams
- Before heavy rain
Runoff can carry chemicals into waterways.
Kids and Pets
Keep pets and children off the lawn until:
- Product dust settles
- The lawn has been watered and dried
Common Mistakes to Avoid
Many homeowners accidentally reduce effectiveness by making simple mistakes.
Applying Too Early
Applying before weeds appear may reduce weed control.
Applying on Dry Grass
Dry grass prevents granules from sticking to weeds.
Over-Application
Too much fertilizer can cause fertilizer burn.
Applying Before Heavy Rain
Rain may wash away the product before it activates.
Tips for Best Lawn Results
For a thick, weed-free lawn, combine fertilizer with proper lawn care practices.
Water Deeply
Deep watering encourages strong roots.
Mow at the Right Height
Most lawns perform best at 3–4 inches tall.
Aerate Compacted Soil
Aeration improves nutrient absorption.
Overseed Thin Areas
Thicker turf naturally prevents weeds.
Frequently Asked Questions
Can I apply Scotts Triple Action to new grass?
Wait until the lawn has been mowed at least four times before applying the product. (grangecoop.com)
Can I mow after applying Scotts Triple Action?
Wait at least 24 hours after applying before mowing.
Can I apply Scotts Triple Action before rain?
Light rain after 24 hours is fine, but heavy rain immediately after application should be avoided.
Should I water before applying?
Light moisture or dew on grass is ideal, but soaking the lawn is not necessary.
Final Thoughts
Scotts Triple Action is an effective all-in-one lawn treatment that simplifies lawn care by combining fertilizer, weed control, and crabgrass prevention. When applied at the right time—typically early spring when weeds begin growing—it can dramatically improve lawn health and appearance.
Key takeaways:
- Apply early spring when temperatures reach 60–80°F
- Spread on wet grass for best weed control
- Avoid watering or mowing for 24 hours
- Follow with regular lawn fertilizer 6–8 weeks later
With proper timing and application, Scotts Triple Action can help transform a thin, weed-filled lawn into a dense, green, and healthy yard throughout the growing season.
I’m David man behind Lawn Mowerly; I’ve been dealing with lawnmowers and Tractors with my father since I was a kid. I know every make and model and what each one is capable of and love helping people find the perfect equipment for their needs.