cornerstone 5 herbicide Quintessential Herbicide – GCI Turf Academy

cornerstone 5 herbicide Quintessential Herbicide – GCI Turf AcademyQuintessential Herbicide Professional Crabgrass & Weed Control The use of a methylated seed oil is recommended to greatly enhance the effectiveness of the product. Quintessential is a pro grade post emergent herbicide powered by quinclorac, designed to eliminate crabgrass, grassy weeds, and broadleaf weeds without damaging your turf when applied correctly. Its trusted by professionals and perfect for serious DIY homeowners who want commercial level

🌱 Quintessential™ Herbicide – Professional Crabgrass & Weed Control

The use of a methylated seed oil is recommended to greatly enhance the effectiveness of the product. 

Quintessential™ is a pro-grade post-emergent herbicide powered by quinclorac, designed to eliminate crabgrass, grassy weeds, and broadleaf weeds without damaging your turf when applied correctly. It’s trusted by professionals and perfect for serious DIY homeowners who want commercial-level results.

This product delivers strong control on both warm-season and cool-season grasses while remaining safe for established lawns when used as directed.

✔ Controls

• Crabgrass (large & smooth)

• Barnyardgrass, foxtail, kikuyugrass, signalgrass

• Clover, dandelion, dollarweed, violets, bindweed, and more

Application rates and weed control guidelines are based on the official label.

🌿 Approved Turf Types

Quintessential™ is labeled for use on established:

Highly / Moderately Resistant Turf

• Bermudagrass (Common & Hybrid)

• Kentucky Bluegrass

• Tall Fescue

• Perennial Ryegrass

• Zoysiagrass

• Buffalograss

• Seashore Paspalum

• Bentgrass (with restrictions)

• Fine Fescue (in blends only)

Always follow turf restrictions listed on the label.

📊 Application Rates by Turf Type

Maximum Annual Rate:
Do not exceed 2.9 fl oz per 1,000 sq ft per year.

🧪 Mixing Instructions (Per 1,000 sq ft)

For best results, use methylated seed oil (MSO).

1. Fill sprayer ¾ full with clean water

2. Add measured Quintessential™

3. Add MSO at 0.55 fl oz per 1,000 sq ft

4. Finish filling tank and agitate well

5. Maintain agitation while spraying

Backpack Sprayer (Spot Spraying)

⏱ Best Application Timing

• Apply to actively growing weeds

• Do not mow 2 days before or after

• Do not water for 24 hours after spraying

• Ideal when temps are moderate and turf is not stressed

• Repeat applications may be needed for heavy infestations

🛡 Safety & Use Guidelines

• Wear gloves, long sleeves, and eye protection

• Keep people and pets off until dry

• Do not spray in wind over 10 mph

• Avoid flower beds, vegetables, and ornamentals

• Do not apply to drought-stressed turf

Safety guidance is based on label instructions.

⭐ Why Choose Quintessential™?

✅ Professional quinclorac formula
✅ Excellent crabgrass control
✅ Safe on major turf types
✅ Works on grassy + broadleaf weeds
✅ Proven results for DIY and pros

If you want real lawn-care results, this is the product professionals rely on.

Not for sale in AK, AZ, HI, WY

WE DO NOT ALLOW RETURNS ON LIQUID PRODUCTS. NO EXCEPTIONS.