Read the City's water quality protection publications.
Combined products are usually not a good mix – the best time to treat weeds is NOT usually the best time to fertilize
• Spreading weed killer over the entire lawn is usually overkill
• Some lawn weed killers can stress and damage turf if applied during warm weather
• Using an herbicide over the entire lawn can harm nearby trees
• Herbicides can be tracked into the house by pets or on shoes
Weed and Feed products include both fertilizers and weed killers. In most cases, using this combined product is environmentally-unsound.