Compassplant Weed Killer

Silphium laciniatum Herbicide

Description of Compassplant (Silphium laciniatum):
Compassplant gets its name from the fact that its leaves tend to be oriented in the north-south direction to avoid the heat of the sun. It's tall and grows from 3 to 12 feet. The flowers are yellow and bloom from between July and September. It's native to prairies.

Control Options for Compassplant

Legend:
Control
Suppression
No Control
Pre-Emergent
Post-Emergent
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Spot Treatment
Label Rate:
0.75 - 1.8 fluid ounces per gallon
Cost Effectiveness:
Makes 11.11 - 26.67 gallons
at a cost of
$1.27 - $3.06 per gallon
Broadcast Treatment
Label Rate:
0.73 - 1.84 fluid ounces per 1,000 sqft
Cost Effectiveness:
Covers 10890 - 27225 square feet
at a cost of
$1.25 - $3.12 per 1,000 sqft
Safe On
Bermudagrass, Zoysiagrass, Buffalograss Safe Rate:
0.75 - 1.5 fluid ounces per gallon
or
0.73 - 1.47 fluid ounces per 1,000 sqft
Annual Ryegrass, Bentgrass, Colonial, Kentucky Bluegrass, Bluegrass, Annual, Perennial Ryegrass, Tall Fescue, Red Fescue, Fine Fescue, Bentgrass Safe Rate:
1.1 - 1.8 fluid ounces per gallon
or
1.1 - 1.84 fluid ounces per 1,000 sqft
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