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The best hardiness zones for St. Augustine grass are USDA growing zones 8, 9, and 10. However, with a bit of extra attention, it'll also grow well in zones 7, 11, and 12.

It is not recommended to mow wet grass, including grass with morning dew. Mowing when wet can damage your lawn, your mower, and potentially cause injury. Wet grass blades are more likely to be torn rather than cut cleanly, which can lead to brown tips and increase the risk of fungal diseases. Additionally, wet clippings can clump together, smothering the grass underneath, and can clog your mower. For best results, wait until the grass is dry to the touch, which is often about two hours after morning dew has evaporated. Regular lawn mower maintenance is also important for a clean cut.

Mowing at least once a week during the growing season is a good general rule. However, every lawn is different, and factors like frequent rain and fertilizer use can cause grass to grow faster, potentially requiring mowing as often as every four days. When you mow, always follow the 'one-third rule': never cut more than one-third of the grass blade's height at once, as this can weaken it and prevent it from taking in proper nutrients. For most grass types, the ideal height is around 2 to 3 inches, though some warm-weather grasses do better when kept shorter at about 1.5 to 2 inches.

If you notice your grass is growing quickly and it’s hard to keep up, cut down on how much you water and fertilize it. Another helpful method is to mow the grass at the highest setting your mower will allow. Mowing at a higher setting slows grass growth since the blades won’t need to repair themselves as quickly if they’re kept at a longer length.