How long after spraying weed killer can I plant grass seed?

After weed spraying, it's important to wait before planting grass seed to ensure the herbicide has broken down and won't harm new growth. Typically, you should wait at least 7 to 14 days, depending on the type of weed killer used. Some stronger products may require a longer waiting period, so always check the instructions on the label. This waiting time allows the soil to become safe for seed germination. Rushing to plant grass seed too soon after weed spraying can lead to poor results, as leftover chemicals in the soil may prevent proper root development and healthy growth.