Blue Oat Grass – How to Grow, Care, Propagation, Pruning(Guide)

Blue Oat Grass – How to Grow, Care, Propagation, Pruning

For its appealing appearance, blue oat grass is a grass plant that many people frequently grow in their home landscapes. an an a the world’siractual the world of the an an every a the world of the an a Its structure resembles an upward-flowing fountain with long, stiff, blue-green clusters. Care for blue oat grass is simple, but you must follow the instructions below to handle it correctly.

They are referred to as semi-evergreen plants because they exhibit a light blue tint in the winter and a blue-green color in the summer. These are ideal for landscaping plants because they are little maintenance. They have a good reputation for maintaining a small space and growing only once in their lifetime, so they won’t self-seed. The positive thing is that they don’t take over the entire garden with its rhizome as other grass plants do.

The oat term is used to describe this blue oat grass because its fall foliage is brown.

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Background Details

These plants are among the most well-liked varieties of genuine grass plants, and many people utilize them to enhance the structure and style of outdoor spaces. It is a member of the Poaceae family and is found in Southern and Central European meadows. Helictotrichon sempervirens is the scientific name of this plant, and the word “sempervirens” has two meanings in botany texts: immortal and evergreen.

They spread out to be about 40-60 cm (20-24 inches) wide and grow in their own area without spreading to other locations like other grass plants are known for. They grow to be approximately 125-140 cm (45-55 inches) tall in height. Beginning in early May and lasting through the end of August, these grasses blossom.

How to Grow Blue Oat Grass (Helictotrichon sempervirens)

When growing this grass, choose a spot where it receives adequate direct sunshine and make sure to maintain the soil moist when the grasses are young. Although you can grow them in fertile soil, many individuals have grown them in less fertile soil because to their adaptability to clay and sandy soil.

In this essay, I’ve described how to easily propagate the plant (Helictotrichon sempervirens).The nicest thing about this plant is that it won’t disrupt the soil of other plants because its rhizomes remain in one place during its entire life and don’t spread as other grass plants do.For home owners and gardeners who have larger landscapes, it reduces the invasiveness of the plant.

If these grasses sprout new seedlings, you should pull them out to avoid the need for more space-consuming plant growth.

(Helictotrichon sempervirens) Blue Oat Grass Care

This grass requires very little maintenance from its owner and is very simple to maintain. The best way to take care of blue oat grass is to water it once or twice a week and to feed it once-a-year with fertilizer. The dead or old leaves that makes this grass look unattractive can be removed by pruning. Additionally, it has been claimed that these grasses were affected by a rust fungus in the United States, which was found on blue oat grass leaves. However, don’t panic; this only happened in 2015, and the disease is uncommon. Instead, take good care of your plant.

Here are some pointers for caring for blue oat grass:


Due to the low nitrogen content of the soil where these grass plants thrive, they often need less fertilizer or plant food to grow.

To meet the needs of these grass plants for nutrients, a fertilizer with 10-10-10 ratios of potassium, nitrogen, and phosphorus is available.


People They often grow in gardens or home landscapes, so they never need to be replanted because they stay in the same place. However, if you ever grow them in a large container, you only need to refresh the soil by adding new soil and a low nitrogen fertilizer mix.


These grass plants thrive in well-draining soil that also contains peat moss or decomposed mature material, as these ingredients help the soil to moderately dry out excess moisture.

It indicates that water either dries slowly or effectively after roots have their necessary amount of water.

Blue Oat Grass Height

N.C. Cooperative Extension states that this grass spreads out to a width of about 2.6 feet (24 inches) and grows to a height of about 2-3 feet (24 to 36 inches).


These grass plants enjoy getting direct sunshine, and when they choose a favorable place, they can get 5 to 6 hours of healthy sunlight daily.

They can also adapt to this indirect light condition if you plant them in partial shadow or shade, but they won’t flower well in this low light.


These grass plants can withstand high temperatures as well as low to medium humidity levels. According to N.C. Cooperative Extension, the hardiness zone for this plant ranges from 4 to 8.


This blooms in the summer, when we can see the blue-white blossoms of this plant protruding from the sides of clumps of oats. Its flower has a spike-like shape and reaches a height of about 4 feet.


Although these grass plants (Helictotrichon sempervirens) only require medium to low amounts of water and are easily adapted to low water conditions, this does not indicate that they should be left to their own devices.

You should water it when they feel dry or when they get too much sunlight for the day. You can give them water every day or every two to three days.

They are quite sturdy, and the grass can adapt to a variety of environmental factors and is drought resistant.

(Helictotrichon sempervirens) Blue Oat Grass Propagation

(Helictotrichon sempervirens) Blue Oat Grass Propagation


Although this method appears to be straightforward, it takes the entire year to notice plant growth. You can use an existing plant or purchase the seeds from a nearby retailer.

These plants (Helictotrichon sempervirens) produce flowers, and once the blossom has faded or dried, the feathery seeds can be used to spread the plant.

Typically in the fall, remove the seeds, place them in a quality potting mix, water them so they can absorb moisture, and use a plastic bag with a hole cut in it to allow for air circulation.

As the seed needs moisture to produce seedlings more quickly, it will cause the plants to retain moisture.

Then move this plant to a large pot and let it develop there if you notice any progress, such as new leaves emerging.


Helictotrichon sempervirens can be multiplied by taking a stem that has at least two leaves on it and cutting it.

When doing this for the first time, people put a few strong roots with leaves in low fertile soil with good drainage.

This grass was propagated because, over time, it goes dormant, stops growing, and eventually dies. To bring it back to life, you need to remove its stems in order to create a new plant, which will allow it to survive for many more years.

(Helictotrichon sempervirens) Blue Oat Grass Pruning

According to the Royal Horticultural Society, the upper layer of leaves of blue oat grass should be pruned by 10 to 12 inches. In order to encourage your plant to grow and blossom in the spring, pruning is done to eliminate the dead leaves. Being a grass plant, Helictotrichon sempervirens’ old leaves will naturally wilt, detach from the main rhizome, and degrade on the soil’s surface while new leaves begin to take their place. The plant should use its own dead foliage as soil fertilizer whenever possible, but this process takes time. Either you remove the unhealthy leaves, or the plant will gradually age and deteriorate on its own.

Most Search Questions

Blue Fescue

The gorgeous decorative plant that many people employ in their home landscapes is actually a very strong grass species. It requires extremely little maintenance and can adapt to many different situations. Blue fescue flourishes in sunny areas and adores the sun. It thrives in USDA zones 4 through 9, where it blooms on very long flower stem tips. It is a type of grass that is always green and has deep blue leaves.

Blue oat grass vs Blue fescue

Although the two plants resemble one another greatly, blue fescue is larger than blue oat grass. It is between 19 and 30 inches tall and has extremely dark blue foliage. The vibrant color of blue fescue is visible during the entire winter season.

Blue oat grass sapphire 

Helictotrichon sempervirens, also known as blue oat grass, has a variant called blue oat grass sapphire. Its leaves are a steel blue tint. They are also known as perennial grass plants, and they have a spread of 2 inches and a height of 18 to 20 inches. Early summer is when flowers begin to blossom, and it lasts until the last month of the season. This plant thrives in zones 3 to 8, according to the USDA, and grows best in direct sunlight.

Blue oat grass seeds

The seeds may be acquired from online businesses, As offline it was usually out of stock or not available so here is the link where you can buy it and don’t worry it’s available easily there and won’t get out of stock.

Blue oat grass for sale

Here is the link where you can check out where you can get blue oat grass seeds and also live plants. The deal is currently running in many online retailers, although most of the time it is not accessible in nearby stores or may run out of stock.

Blue oat grass in containers

The amount of sun exposure, the type of soil utilized, the climate, and how well it does in winter are all factors that affect how hardy these grasses are. However, blue oat grass needs to be replanted after a year if you want it to continue growing in containers.

Blue oat grass companion plants

These blue oat grasses can be grown with partner plants such as blue junipers, blue mist spirea, dwarf lobelia, blue daze, blue spruce, etc. that will complement most landscapes well. It can be quite helpful to know companion plants because you can then select how the landscape will look.



According to evidence from two different universities, including the University of Florida and Washington State University, blue oat grass is not an invasive species. These plants aren’t deemed invasive because they don’t spread by rhizomes like other grasses, take up less space than other plants, or harm other plants’ soil.

Should Blue oat grass be cut back?

Yes, they can be pruned back, which will help the blue oat grass re-grow. However, in certain cases, cutting them back is not necessary because the dead leaves will eventually fade and be replaced by new ones, which will then dissolve into the soil. Since it is fertile, gradually the soil will flourish. Even if you can pull them with your hand, it’s best to cut them with a sterilized tool to prevent injury to your hand.

What can I plant with blue oat grass?

In addition to the blue oat grass plant, you may also plant blue junipers, lavender, blue spruce, Caryopteris, campanula, Japanese ladder plant, and other plants that will complement the color of the grass. These blend in beautifully with the blue oat in the countryside.

Is Blue oat grass deer resistant?

Yes, blue oat grass resists deer. These grass have moderate water requirements and can thrive with less water because to their drought resistance, per the University of California webpage. These feature slender blue foliage and yellow blooms.

Is Blue oat grass evergreen?

Yes, they are evergreen during the summer, but during the winter they change to brown foliage, which is why they are referred to as semi-evergreen because the stunning steel blue foliage of blue oat grass does not remain visible throughout the entire year. Also, don’t let them dry out because they can become brown from a lack of water or dry roots.

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