Ortho Grass B Gone targets stubborn grassy weeds in lawns while protecting desirable turf. This targeted approach helps homeowners and groundskeepers manage invasive species without broad-spectrum herbicides.
Below is a structured overview of key product details, application windows, and safety considerations for quick reference.
| Product Name | Active Ingredient | Target Weeds | Ideal Application Window |
|---|---|---|---|
| Ortho Grass B Gone | Quinclorac | Bermuda, crabgrass, foxtail, ryegrass | Early spring to early fall, actively growing weeds |
| Label Rate per 1,000 sq ft | 1.3 to 2.0 fl oz | Broadleaf weeds not controlled | Avoid temperatures above 90°F |
| Tank Mix Safety | Compatible with certain fertilizers | Do not mix with other grass herbicides | Check label for specific combinations |
| Reentry Interval | 24 hours | Pet safety after drying | Irrigation allowed after dry foliage |
Understanding How Ortho Grass B Gone Works
Mode of Action and Grass Selectivity
Ortho Grass B Gone uses quinclorac, which inhibits key growth processes in grassy weeds while typically preserving most broadleaf lawn grasses. This selective action allows targeted control without significant damage to desirable turf when instructions are followed precisely.
Soil and Foliar Contact
The herbicide performs effectively with either soil or foliar contact, depending on the growth stage of the weeds. Quick absorption into leaf tissue speeds results, while some movement within plant tissue helps control emerging seedlings before visible symptoms appear.
Optimal Timing for Application
Seasonal Windows and Temperature Considerations
Apply during periods of active growth, generally from early spring through early fall. Warmer temperatures improve effectiveness, but avoid applications when temperatures exceed the labeled limit to prevent potential turf stress.
Weed Size and Growth Stage
Treat actively growing weeds that are in the vegetative stage for best control. Smaller, uniform weeds respond more consistently than larger, mature plants, reducing the likelihood of repeat applications.
Turf Compatibility and Grass Types
Compatible Turf Species
Most established cool-season and warm-season grasses tolerate labeled rates when used according to directions. Species such as bluegrass, fescue, Bermuda, and Zoysia generally respond well when application guidelines are strictly followed.
Avoiding Injury to Sensitive Grasses
Centipede and some newly seeded or stressed turfs may be more sensitive. Always conduct a small area test and maintain proper cultural practices, including adequate watering and mowing, to minimize potential injury.
Application Methods and Equipment
Spray Tank Preparation
Mix with the appropriate amount of water using clean equipment to ensure even coverage. Agitate the spray tank frequently to keep the solution homogeneous, especially when applying at higher label rates.
Drop Spreader Alternatives
Although primarily formulated for liquid application, certain formulations may be adapted for specific spreader types if the label permits. Confirm compatibility and calibration with the manufacturer before switching from broadcast spraying.
Key Takeaways for Lawn Weed Management
- Target grassy weeds such as crabgrass and Bermuda with labeled rates for reliable control
- Apply during active growth periods while avoiding extreme heat to protect turf
- Ensure thorough coverage by calibrating sprayers and using appropriate nozzles
- Prevent drift with physical barriers and careful application timing near sensitive plants
- Monitor treated areas and follow label guidance for repeat applications if needed
FAQ
Reader questions
Can Ortho Grass B Gone be applied near flower beds?
Yes, with careful placement. Use a shield or edge to protect desired broadleaf plants, apply during calm conditions, and avoid drift onto non-grass foliage to prevent unintended contact damage.
How soon can I mow after application?
Wait until the treated area is dry, which typically takes a few hours under normal conditions. Mowing too soon can reduce effectiveness and increase the risk of herbicide contact with freshly cut leaf tissue.
Is it safe for children and pets after application?
Reentry is generally allowed after drying, often within 24 hours. Keep children and pets off treated areas until dry, and always follow specific instructions on the product label for the most accurate guidance.
What should I do if I see lawn discoloration?
Minor yellowing may resolve with proper watering and care, but significant damage warrants consultation with lawn care professionals. Document the situation and follow label guidance regarding recovery and reapplication timing.