Can You Plant Grass Seed in Cool Weather?


Grass is one of the most widespread plant species on Earth; nevertheless, planting grass seed in the spring or the summer is often recommended for optimal results. As their names suggest, many types of grass are warm-season grasses. These types of grasses have a greater propensity to grow and germinate more successfully in warmer temperatures. However, the optimal time to start the process of seed germination for certain types of grass is around the end of summer or the beginning of October. Cool-season grasses are the most common name for these types of plants.


Late in the summer or at the beginning of the autumn is the best time to sow cool-season grasses.

Get to Know Your Grass

Britannica states that grasses are typically members of the families Poaceae, Cyperaceae, and Juncaceae; nevertheless, a wide variety of other plant species are often referred to be grasses. The grass family proper has perhaps in the neighbourhood of 10,000 members. Grasses often have fibrous, branching roots and spherical stems that are typically hollow in the areas where the joints are located. Their leaves have the appearance of blades, and many types of grass are utilised in lawns and gardens, as food for animals who graze on them, or in a variety of other purposes, such as providing refuge for a wide variety of creatures that live in the wild.

According to research conducted by Penn State Extension, turfgrasses, which are often found in lawns, are characterised by very consistent growth and a relatively lengthy lifespan. They are also able to withstand being trodden on and having their grass cut often. Caryopsis is the name given to the seeds that are produced by grass plants. These seeds include both an embryo and an endosperm. A wall of the ovary, known as the pericarp, surrounds the seed and protects it.

Planting Grass in Cold Weather

When grass seeds should be sown depends largely on both the area in which they are going to be grown and the particular kind of grass that is going to be grown. A chart of the temperatures at which grass seed germinates, which is easily accessible online, may be of use.

When considering the possibility of planting grass during times of colder weather, it is essential to determine if the type of grass being contemplated is one that grows best during the warm or chilly seasons. For example, Kentucky bluegrass (Poa pratensis), which may be grown in the growth zones 3 to 7 of the USDA, is often regarded as a cool-season grass, meaning that it thrives best when planted in climates with colder temperatures. When it comes to grasses that grow during the cold season, the optimum time to sow grass seed is often around the end of the summer or at the beginning of the autumn. The roots of cool-season grasses are able to continue growing at soil temperatures that drop below 50 degrees Fahrenheit; however, this process might become inhibited when the temperature is close to freezing.

Temperatures ranging from 59 to 86 degrees Fahrenheit are ideal for the germination process of Kentucky bluegrass. Additionally, there are many varieties of warm-season grasses, and the optimal time to sow grass seed for these grasses is during the spring and summer months. One such example is the grass species Bermudagrass (Cynodon dactylon), which can be grown in USDA zones 7 to 10. According to Seedland, the temperature must be at least 80 degrees Fahrenheit for this particular kind of grass to successfully germinate.

Caring for Grass

According to the Missouri Botanical Garden, Kentucky bluegrass thrives in full sun to partial shade and thrives best in rich soil that has adequate drainage. It also grows best in areas that get at least some direct sunlight. Additionally, it thrives in areas that are somewhat colder and soils that are neutral to slightly acidic. It has to be fertilised three times a year in May, September, and October in addition to receiving consistent watering once or twice each week. If temperatures stay at or above 90 degrees for an extended length of time, the grass may go brown and go into a condition of semidormancy.

According to the Missouri Botanical Garden, Bermudagrass thrives on soil that is dry to medium in consistency, has good drainage, and is subjected to a significant quantity of sunlight. In keeping with its classification as a warm-season grass, it has the ability to withstand heat and drought with relative ease, despite the fact that it is often regarded as being less winter hardy than other kinds of grass. In the event that winter temperatures dip below 10 degrees, it is possible that some of the grass may perish. Maintain a consistent mowing schedule and provide fertiliser to the grass from May through August, when it is actively growing.