To keep weeds out of flower beds using grass and weed killer along with a product like PREEN, follow these steps:

Clear Existing Weeds: Remove any existing weeds from the flower bed by hand or using a hoe.
Apply Grass and Weed Killer: Spray a selective grass and weed killer on the area. Be careful not to spray it on desirable plants. Follow the product instructions for application rates and safety precautions.
Use PREEN: Apply PREEN or a similar pre-emergent weed control product. This helps prevent weed seeds from germinating. Follow the package instructions for proper application rates and timing.
Mulch: Apply a layer of mulch over the soil. Mulch helps suppress weed growth by blocking sunlight and conserving soil moisture. It also provides a neat appearance to the flower bed.
Regular Maintenance: Keep up with regular maintenance, including pulling any new weeds that may emerge. Monitor the flower bed for signs of weed growth and address them promptly.
Remember to read and follow the instructions on the labels of the products you use, and take care not to harm desirable plants in the process #preen #bermudagrasscentral #bermudagrass