With four powerful active ingredients, Q4® Plus Turf Herbicide for Grassy & Broadleaf Weeds offers a single product option to control crabgrass and yellow nutsedge, as well as tough broadleaf weeds like clover and chickweed. Q4 Plus is highly selective on cool-season and listed warm-season turfgrasses. It offers rapid visual response and has a one-week reseeding interval for most listed turf.
| Active Ingredient | % |
|---|
| 2,4-D | 11.81 % |
| Quinclorac | 8.43 % |
| Dicamba | 1.49 % |
| Sulfentrazone | 0.69 % |
| Other Ingredients | 77.58 % |
Label & SDS
Mode of Action
Lipid Synthesis Inhibitors, Growth Regulators
Site of Action
(1) ACCase Inhibitor, (4) Specific site unknown
Available on Amazon
Available on Do My Own
Safe On
Click on a grass type below to see safe application rates:
Annual Bluegrass, Annual Ryegrass, Fine Fescue, Kentucky Bluegrass, Perennial Ryegrass, Roughstalk Bluegrass, Tall Fescue, Bermudagrass, and Zoysiagrass
Not Safe On
Maximum Yearly Limits
The maximum number of broadcast applications is limited to 2 per year with a minimum of 30 days between applications. The maximum application rate is 8 pints of product per acre per application (0.88 lb 2,4-D ae and 0.10 lb dicamba ae/A/application). The maximum seasonal rate is 16 pints of product per acre per year (1.76 lb 2,4-D ae and 0.20 lb dicamba ae/A/year).
Time Between Applications
The maximum number of broadcast applications is limited to 2 per year.
Mowing Instructions
Delay mowing 2 days before and until 2 days after the application of this product. Additional stress from low mowing heights may increase the possibility of turf injury. Clippings from the first three mowings should be left on the treated area. Do not use these clippings as mulch or compost around flowers, ornamentals, trees, or in vegetable gardens.
Water Instructions
Do not apply this product immediately before rainfall or irrigation. For best results, do not irrigate or water the turfgrass within 24 hours after application. If dry conditions exist, a scheduled irrigation or watering 24 hours before and 24 hours after application is recommended. If rainfall does not occur in 2 to 7 days after application, irrigation of at least one-half inch is recommended.
Before Seeding Instructions
Turf species on this label can be seeded into the treated areas 7 days after application with the exception of Kentucky bluegrass. Kentucky bluegrass can be seeded 14 days after application unless slight growth regulation can be tolerated.
After Seeding Instructions
Delay application of this product to grass seedlings until after the second or third mowing, or 28 days after emergence.
CertainLabel™
Q4 Plus Optimized Application Label Rate Calculator
Legend:
Control
Suppression
No Control
Spot Treatment:
per
Blanket Treatment:
per
1
| Grass / Turf Types | Safe |
|---|---|
| Annual Bluegrass |
|
| Annual Ryegrass |
|
| Fine Fescue |
|
| Kentucky Bluegrass |
|
| Perennial Ryegrass |
|
| Roughstalk Bluegrass |
|
| Tall Fescue |
|
1
Jump to
CertainLabel™ Q4 Plus Label Rates & Calculator
for
these 7 turf types
Spot Treatment
per
Label Rate:
2.6 - 3 fluid ounces per gallon
Cost Effectiveness:
Makes 42.667 - 49.231 gallons
at a cost of
$2.72 - $3.14 per gallon
at a cost of
$2.72 - $3.14 per gallon
Blanket Treatment
per
Label Rate:
2.6 - 3 fluid ounces per 1,000 sqft
Cost Effectiveness:
Covers 42667 - 49231 square feet
at a cost of
$2.72 - $3.14 per 1,000 sqft
at a cost of
$2.72 - $3.14 per 1,000 sqft
2
| Grass / Turf Types | Safe |
|---|---|
| Bermudagrass |
|
| Zoysiagrass |
|
2
Jump to
CertainLabel™ Q4 Plus Label Rates & Calculator
for
these 2 turf types
Spot Treatment
per
Label Rate:
1.8 - 2.6 fluid ounces per gallon
Cost Effectiveness:
Makes 49.231 - 71.111 gallons
at a cost of
$1.88 - $2.72 per gallon
at a cost of
$1.88 - $2.72 per gallon
Blanket Treatment
per
Label Rate:
1.8 - 2.6 fluid ounces per 1,000 sqft
Cost Effectiveness:
Covers 49231 - 71111 square feet
at a cost of
$1.88 - $2.72 per 1,000 sqft
at a cost of
$1.88 - $2.72 per 1,000 sqft
1
| Grass / Turf Types | Safe |
|---|---|
| Bahiagrass |
|
| Bentgrass |
|
| Carpetgrass |
|
| Centipedegrass |
|
| Dichondra |
|
| St. Augustinegrass |
|
1
Jump to
CertainLabel™ Q4 Plus Label Rates & Calculator
for
these 6 turf types
Spot Treatment
No spot treatment rates listed. Please, review the label or contact the merchant for more information.
Broadcast Treatment
No broadcast treatment rates listed. Please, review the label or contact the merchant for more information.
1
1
Jump to
CertainLabel™ Q4 Plus Label Rates & Calculator
for
these 93 weeds
Spot Treatment
per
Label Rate:
1.8 - 3 fluid ounces per gallon
Cost Effectiveness:
Makes 42.667 - 71.111 gallons
at a cost of
$1.88 - $3.14 per gallon
at a cost of
$1.88 - $3.14 per gallon
Blanket Treatment
per
Label Rate:
1.8 - 3 fluid ounces per 1,000 sqft
Cost Effectiveness:
Covers 42667 - 71111 square feet
at a cost of
$1.88 - $3.14 per 1,000 sqft
at a cost of
$1.88 - $3.14 per 1,000 sqft
2
| Weeds | Pre- Emergent |
Post-Emergent |
|---|---|---|
| Barnyardgrass |
|
|
| Crabgrass, Large |
|
|
| Crabgrass, Smooth |
|
|
| Foxtail, Giant |
|
|
| Foxtail, Green |
|
|
| Foxtail, Yellow |
|
|
| Nutsedge, Yellow |
|
|
| Signalgrass |
|
|
2
Jump to
CertainLabel™ Q4 Plus Label Rates & Calculator
for
these 8 weeds
Spot Treatment
per
Label Rate:
1.8 - 3 fluid ounces per gallon
Cost Effectiveness:
Makes 42.667 - 71.111 gallons
at a cost of
$1.88 - $3.14 per gallon
at a cost of
$1.88 - $3.14 per gallon
Instructions:
Second or follow-up applications on ornamental turfgrass may be required. Early summer treatments are generally more effective. Applications in the summer (approximately July 15 to August 15) to older, drought stressed grassy weeds are less effective. Late summer applications (after August 15) to mature crabgrass can be very effective.
Blanket Treatment
per
Label Rate:
1.8 - 3 fluid ounces per 1,000 sqft
Cost Effectiveness:
Covers 42667 - 71111 square feet
at a cost of
$1.88 - $3.14 per 1,000 sqft
at a cost of
$1.88 - $3.14 per 1,000 sqft
Instructions:
Second or follow-up applications on ornamental turfgrass may be required. Early summer treatments are generally more effective. Applications in the summer (approximately July 15 to August 15) to older, drought stressed grassy weeds are less effective. Late summer applications (after August 15) to mature crabgrass can be very effective.
3
| Weeds | Pre- Emergent |
Post-Emergent |
|---|---|---|
| Buttonweed, Virginia |
|
|
| Daisy, English |
|
|
| Violet, Wild |
|
|
3
Jump to
CertainLabel™ Q4 Plus Label Rates & Calculator
for
these 3 weeds
Spot Treatment
per
Label Rate:
1.8 - 3 fluid ounces per gallon
Cost Effectiveness:
Makes 42.667 - 71.111 gallons
at a cost of
$1.88 - $3.14 per gallon
at a cost of
$1.88 - $3.14 per gallon
Instructions:
Follow-up application may be required.
Blanket Treatment
per
Label Rate:
1.8 - 3 fluid ounces per 1,000 sqft
Cost Effectiveness:
Covers 42667 - 71111 square feet
at a cost of
$1.88 - $3.14 per 1,000 sqft
at a cost of
$1.88 - $3.14 per 1,000 sqft
Instructions:
Follow-up application may be required.