Fertilizing cool-season or warm-season grasses

Cool-season grasses grow well in the cooler regions of the northern United States while the warm-season species are best adapted to the warmer southern regions.

Each grass has a different growing season and you should apply fertilizers only when your lawn is actively growing. If you fertilize during the period that your lawn is dormant, you're effectively wasting fertilizer and encouraging weed growth.

Cool-season grasses such as bluegrasses, fescues or perennial ryegrass, have two growing periods: spring and fall. They go semi-dormant in the hotter months, so primary fertilization should be done in the fall, although you can fertilize lightly in the early cool of spring.

Fertilizing in the fall will stimulate root growth before winter really sets in. High rates of nitrogen helps build up food reserves, so your lawn will be greener and healthier in the spring.

Warm-season grasses, such as bahia, bermuda and zoysia grasses have a growing season that generally is in the warmer months of late spring and summer. The best time to fertilize is when the grass begins greening up in spring and then again in late summer, after the intense heat has passed.

Do not fertilize warm-season grasses in autumn. It's too late in the year and that's when they're winding down their growing season.

Check your state and local codes before starting any project. Follow all safety precautions. Every effort has been made to ensure the accuracy and safety of this information. Neither Westlake nor any contributor can be held responsible for damages or injuries resulting from the use of the information in this document.

Check your state and local codes before starting any project. Follow all safety precautions. Every effort has been made to ensure the accuracy and safety of this information. Neither Westlake nor any contributor can be held responsible for damages or injuries resulting from the use of the information in this document.

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