Jump to Top

Cornflower Weed Killer

Centaurea cyanus Herbicide

Description of Cornflower (Centaurea cyanus):
Cornflower, aka "bachelor's button," is well known for its color which is described as "cornflower blue." It belongs to the daisy family and can grow from between 1 to 3 feet in height. The leaves are grayish-green and the flowers blue. It blooms from June to September.
According to the manufacturer approved labels: The following 3 weed killers, applied at the listed application rates, will control Cornflower.
Pre-Emergent
Post-Emergent
| More Info | View Label
Spot Treatment
Label Rate:
1 - 1.5 fluid ounces per gallon
Cost Effectiveness:
Makes 21.333 - 32 gallons
at a cost of
$0.53 - $0.79 per gallon
Blanket Treatment
Label Rate:
1.1 fluid ounces per 1,000 sqft
Cost Effectiveness:
Covers 29040 square feet
at a cost of
$0.58 per 1,000 sqft
Safe On
Annual Ryegrass, Bahiagrass, Bentgrass, Bermudagrass, Buffalograss, Carpetgrass, Centipedegrass, Chewings Fescue, Fine Fescue, Hard Fescue, Kentucky Bluegrass, Kikuyu Grass, Perennial Ryegrass, Red Fescue, St. Augustinegrass, Tall Fescue, and Zoysiagrass
Safe Rate:
1 - 1.5 fluid ounces per gallon
or
1.1 fluid ounces per 1,000 sqft
CertainLabel™ Calculator for 2,4-d Amine & these grass types
Pre-Emergent
Post-Emergent
| More Info | View Label
Spot Treatment
Label Rate:
0.91 - 1.29 fluid ounces per gallon
Cost Effectiveness:
Makes 24.806 - 35.165 gallons
at a cost of
$1.41 - $1.99 per gallon
Blanket Treatment
Label Rate:
0.91 - 1.29 fluid ounces per 1,000 sqft
Cost Effectiveness:
Covers 24806 - 35165 square feet
at a cost of
$1.41 - $1.99 per 1,000 sqft
Safe On
Bahiagrass, Bentgrass, Bermudagrass, Chewings Fescue, Fine Fescue, Kentucky Bluegrass, Perennial Ryegrass, Tall Fescue, and Zoysiagrass
Safe Rate:
0.91 - 1.29 fluid ounces per gallon
or
0.91 - 1.29 fluid ounces per 1,000 sqft
CertainLabel™ Calculator for Cool Power & these grass types
Centipedegrass and St. Augustinegrass
Safe Rate:
116.48 - 165.12 fluid ounces per gallon
or
0.91 - 1.29 fluid ounces per 1,000 sqft
CertainLabel™ Calculator for Cool Power & these grass types
Pre-Emergent
Post-Emergent
| More Info | View Label
Spot Treatment
Label Rate:
0.73 - 1.28 fluid ounces per gallon
Cost Effectiveness:
Makes 250 - 438.356 gallons
at a cost of
$0.57 - $1.01 per gallon
Blanket Treatment
Label Rate:
0.73 - 1.28 fluid ounces per 1,000 sqft
Cost Effectiveness:
Covers 250000 - 438356 square feet
at a cost of
$0.57 - $1.01 per 1,000 sqft
Safe On
Chewings Fescue, Fine Fescue, Hard Fescue, Red Fescue, and Tall Fescue
Safe Rate:
0.73 - 1.28 fluid ounces per gallon
or
0.73 - 1.28 fluid ounces per 1,000 sqft
CertainLabel™ Calculator for Sure Power Selective & these grass types
Kentucky Bluegrass and Perennial Ryegrass
Safe Rate:
0.73 - 1.28 fluid ounces per gallon
or
0.73 - 1.28 fluid ounces per 1,000 sqft
CertainLabel™ Calculator for Sure Power Selective & these grass types

Questions & Comments
Log in or sign up to leave comment   Log In  Sign Up