Pre-emergents, such as Andersons Weed and Grass Preventer with 5% Treflan Herbicide, should be applied when the soil temperature reaches 55 degrees Fahrenheit in the spring and before it falls below 55 degrees Fahrenheit in the fall months.
Per the product label, you can use Andersons Weed and Grass Preventer with 5% Trelan Herbicide before or after planting but prior to germination of target weeds, or immediately after culmination of listed tolerant species. You should not use this product around transplants until the soil or potting media is settled by packing and irrigation through watering or rainfall. Since hostas are not listed as tolerant on the label, you would need to make a trial application at a small rate around a few plants and then observe them for 30-60 days after application to determine tolerance. We would not recommend planting seeds in an area where this product has been applied for 4-6 months, until the pre-emergent has worn off.
Andersons Weed and Grass Preventer with 5% Treflan Herbicide is safe for pets if used as directed. Keep pets out of the treating area until the proudct has fully dried.
No, Andersons Weed and Grass Preventer with 5% Treflan Herbicide does not prevent nutsedge or other sedges. The only pre-emergent we have for nutsedge that is labeled for use around some ornamentals is Pennant Magum. Please review the full product label to see if this is safe for use around your plants.
Andersons Weed and Grass Preventer with 5% Treflan Herbicide is a product that is designed to target and kill many types of turfgrasses, grassy weeds, and labeled broadleaf weeds. The active ingredient Treflan (Trifluralin) is not safe for use on desirable turfgrasses and will injure them. Please be sure to review the product label for more information and complete application instructions. Please let us know if you need a recommendation for a pre-emergent to use on your turfgrass.
The Andersons Weed and Grass Preventer with 5% Treflan Herbicide can be applied to listed areas at 80 lbs./acre (1.8 lbs./1000 sq. ft.). That breaks down to about 0.23 oz per square foot in listed areas. We recommend that you calibrate your spreader over a small area before treating the entire area. Keep in mind that this product is not labeled for use on turfgrass.
