Lawn and Garden Learning Center

[Fertilization] [Watering] [Insect & Disease Control]

Weed Control

General Information

A vigorous, healthy turf is the best defense against weed invasion. Proper fertilization, mowing and watering are the key ingredients for building a dense, healthy lawn.

• Weeds can be annual, bi-annual or perennial.
• Weeds fall into two categories: grassy or broadleaf.
• Weeds will readily invade sparse, poor quality turf.
• Weeds may be removed mechanically by digging (all underground parts must be removed) or chemically by applying a herbicide or lawn fertilizer with herbicide.

Pre-Emergent Weed Control - For Grassy Weeds
Particularly effective in controlling weeds like crabgrass, goosegrass, poa annua, foxtail and barnyard grass.

Should be applied before weeds emerge from the soil.

Post Emergent Weed Control - Broadleaf Weeds
Effectively controls dandelion, clover, chickweed, henbit, oxalis and many other broadleaf weeds.
Apply when the weeds are actively growing.
Apply when the lawn is wet from dew or sprinkling, and when rain is not anticipated for at least 48 hours.
Do not apply on newly planted areas until they have been mown at least twice.

4 Steps to Effective Weed Control:

1. Identify type of weed or weeds causing the problem.
2. Use the proper herbicide to control your weed problem.
3. Apply at the recommended rate and appropriate time.
4. Always follow application directions from the product label.

Pre-Emergent

Must be controlled prior to annual germination of seed.

Weeds include annual grasses like crabgrass, goosegrass, Johnsongrass, foxtail, etc.

Water-in after application to create a barrier on the ground surface that does not permit seed germination.

Post-Emergent

Must be controlled when weeds are young, tender and actively growing.

Weeds include dandelion, henbit, chickweed, clover, oxalis, plantain, poison oak, spurge, thistle etc.

Do Not water in, avoid application when rain is expected. Weed control is accomplished by absorption of the chemical into the weed’s system from the leaves, usually a period of 24 - 48 hours.

DO NOT apply when grass is under heat (generally 85 degrees plus) or drought stress. If weed control is desired in these conditions. use product at half rate.