Blue oat grass, Helictotrichon sempervirens maintain properly

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Blue oat grass - Helictotrichon sempervirens

With the blue oat grass (Helictotrichon sempervirens), also blue-rayed oat grass, you get an impressive evergreen beauty in the garden, where you enjoy the whole year, because this type of grass is wintergreen and has colorful blue-gray leaves. With the flowering period from July to late August, it supports the flowering shrubs by imposing yellowish flowers whose stems are over a meter high. As a sun worshiper, it can also be set in full sun locations and requires only little care. We will give you helpful tips on how to easily cultivate the adaptive plant in your perennial flowerbed.

Substrate and soil

Permeable, gritty soil is optimal, because he can not tolerate waterlogging. This applies equally to summer and winter. It is advisable to mix some gravel and sand in the excavation while planting, so that creates a natural drainage. The blue oat grass is one of the dry and steppe plants, it rarely competes for nutrients or water to other shrubs and can be perfectly combined with many plants. The frugal plant may receive some compost or some horn shavings in the excavation, thus the food supply is secured. Blue oat is offered throughout the year and can be planted at any time. Usually, however, the planting should be done in the spring or fall. After the excavation has been filled up and crushed, moderate casting is required.
  • make the plant hole about twice as wide and deep as the rootstock is large
  • enrich the excavation with gravel or untreated potsherds, the soil remains permeable


The blue oat is a sun worshiper and grows optimally in locations that grant him this sun. This makes it easy to cultivate in places that are otherwise considered problem areas because many plants have burns in the blazing sun. Due to its frugality, it can be placed well on southern slopes, even sun or stone beds are gratefully accepted. At these points, there is no danger of getting permanently wet roots. The wrong location can cause the plant to take care or become prone to fungal diseases, so care should be taken carefully. In combination with plants that have similar claims, however, it is developing magnificently. Over time, the host can become wide, note that other plants are not too dense, or separate the perennial in a timely manner.
  • Place the grass for loosening or solitary plant in stone or steppe beds
  • Blue oat grass can be placed well on a sloping embankment
  • In combination with lavender, sage or catnip it comes out well
  • Can also be used for green roofs
  • good companion for rose bushes, because he does not compete
  • can be well placed in small groups of 3 - 4 plants
  • do not put more than 3 plants on one square meter
  • in no case mulching


Blue oat grass - Helictotrichon sempervirens

he blue oat grass is delivered as a perennial plant with rhizome. In the trade, additional varieties such as "sapphire" or "pendula" are available as hanging blue oat. When buying, make sure that there is good root penetration without breaking the pot. Who wants to cultivate the beautiful, evergreen plant as a specimen plant, should try to acquire already larger young plants. So that the prepared and kept place does not appear bald, one year old jittergrass can be put to it outstandingly, which can easily yield as soon as the host of the blue oat grass spreads further. When planting with other perennials or in small groups, a planting distance of about 60 cm is expected, whereby single planting in combination with other dry grasses may be preferred. Blue oatmeal can also be excellently cultivated in the bucket on the terrace. Since it is hardy, it does not need to be specially protected in frost.
  • at strict minus temperatures in the bucket, a garden fleece can be applied
  • The young plants can be well placed in the rock garden, they adapt
  • sandy soil is considered to be well tolerated because of water permeability
  • Cut flower stems after flowering, so the plant itself is strengthened
  • the host itself or the leaves should not be trimmed, they also serve as frost protection and remain steel blue even in winter

Pouring and fertilizing

The frugal plant does not make high demands, even a regular fertilization is not required. As a dry and steppe plant, the blue-oat grass comes in dry phases without elaborate casting. Fertilizing is sufficient once a year some compost, should be dispensed mineral fertilizer in the dry grass.
Tip: If you still want to or need to water, use a watering can with a shower mouth to distribute the water evenly. If you pour in the evening, sunburn can not be caused by drops of water. Pour only moderately.


Like all perennials, the blue oat grass can be propagated by dividing the rootstock or sowing the mature, dry seeds. For the division, the mother plant is dug up, the rhizome divided with a spade or a very sharp knife. The mother plant comes back into the ground. This procedure is also recommended if the plant is already very large. Through the rejuvenation she grows better the following year. The separated young plant is placed at its new location and treated like a normal new perennial of the dry grasses. For propagation by seed breeding, the fully ripe seeds can be collected from the plant in August. In the potting pot 3 - 5 seeds are placed in moist sand. The seed pot should be covered with a foil and opened at least once a day to prevent mold growth. The location should be bright and sunny. After two to three weeks, the first plants can show up. Once they have reached a size of 8 to 10 cm, they may be put outside.
Tip: If you start with two or three seed pots, there is a better chance that enough young plants will grow.


The perennial blue oat is hardy and needs no special precautions for the winter. Like most grass species, it weathers frost and snow quite well, as long as there is no waterlogging. Therefore, when planting, care must be taken to ensure that even in heavy rain and meltwater no moisture can keep in the soil.

Diseases and pests

Blue oat grass - Helictotrichon sempervirens

The easy-care, adaptable plant is not sensitive to diseases and pests. However, it may be too dense fouling that show fungal diseases that also jump quickly to other plants, or be transferred from these. Then a quick remedy must be provided. For this purpose, the affected areas should be generously lighted. In most cases, this will be enough, a chemical control is hardly necessary. Due to its robust structure, the blue oat grass will grow again in the following year.


Grass perennials are beautiful, the blue oat grass is particularly beautiful and should not be missing in any perennial flowerbed. As an easy-care plant, even for problem areas, it can be placed in the blazing sun, in rockeries, as well as on embankments. With its striking blue leaves, it will provide an enjoyable sight throughout the year, an undemanding plant, with optimal placement over many years grows.

Video Board: Best Ornamental Grasses, Festuca 'Elijah Blue' (Blue Fescue).

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