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Eustoma: characteristics, cultivation and diseases

Eustoma: characteristics, cultivation and diseases


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Eustoma is the name of a genus of ornamental plants that derives from the Greek "eu" which means "good" and from "stoma" which means "mouth". Looking at its shape, you can imagine that it is linked to the arrangement of the petals that seem to frame the flower, giving it a particularly appreciable appearance.

Although it is not a recently discovered plant, its commercialization, mainly as a decorative plant or as cut flower, it began only a few decades ago, in the eighties, in Italy as in most of Europe.

Eustoma: characteristics

This genus of plants belongs to the family of Gentianaceae which consists of herbaceous and perennials almost exclusively native to South America, Mexico and the Caribbean.

The belonging to this genus have particular characteristics that we are now going to reveal. They have large, green leaves with someshades that tend to blue. In the summer season, these plants begin to produce numerous stems and, on these stems, the flowers then sprout. These are flowers with a characteristic shape, they can be funnel or trumpet, purple or lilac in color. Each stem is capable of holding several flowers, despite the considerable size they have in comparison.

Today there are several hybrids so the indications on color we have given are not valid: we can also find Eustoma on the market which produce flowers with the most different shades ranging from pink to yellow, but also to red.

In most cases, plants belonging to this genus are used as indoor plants but they can also be placed in the garden, if you live in an area with a suitable climate. They make great blooms, so they are perfect as ornamental plants and can also be used to get cut flowers.

Eustoma: cultivation

There are some precautions to be taken into account in the cultivation ofEustoma but in general we cannot speak of a very complex plant to keep. The important thing is to be careful not to make false steps and not to treat it as a rustic plant: it is not at all.

To begin with, it is necessary to keep the temperature under control so that in winter it does not become too low for what is the resistance of these plants that they do not come from particularly cold areas. If we live in an area where it freezes in the cold season, we must organize ourselves to move the plant indoors, to a protected and warm place but at the same time where there are no radiators too close.

Eustoma need lots of light and in some hours of the day, morning and evening, we can also expose them directly to the sun's rays.

The watering they must be particularly regular in spring and summer: as soon as the soil dries up, it should be wet again. In autumn and winter the pace slows down and the soil doesn't stay too dry for long. Throughout the year we can also spray the leaves, especially if the plant is in a warm environment, but we don't damage the flowers. We only act on the leaves and stems.

The most suitable soil for these plants consists of a fertile soil mix, to avoid the formation of water stagnation we can add peat and sand.

Every two or three years the Eustoma they must be repotted, as far as fertilization is concerned, it must be done throughout the spring and throughout the summer, about every two weeks. We can get a liquid fertilizer to be diluted in the water for watering. There pruning, instead, it is not necessary, just remove the leaves when they dry up or get damaged, just to prevent them from becoming a vehicle for parasitic diseases.

Eustoma: species

There are numerous species that belong to the Eustoma genus, to remember there is the Eustoma Grandiflorum with its beautiful flowers, much in demand as cut flowers. Also call Lisianthus russellianus, are very delicate plants, native to Mexico and South America. They are grown mainly in New Zealand and Japan where numerous cultivars with few or many petals but always bright are created.

Eustoma: diseases

When the mites attack these plants, it is necessary to act promptly by increasing the frequency of nebulizations to the canopy and using specific insecticides if the infestation is severe.

By observing the leaves it is then possible to identify diseases. If they have light colored spots and as they begin to dry out, it could be a fungal attack to be treated with specific fungicides. When the leaves are covered with a greyish powder, a pernospore attack is underway due to a too humid environment. The flower buds could be damaged, so it is better to act with prevention, ensuring good air circulation.

The appearance of yellowing leaves, the enemy to fight is the spider mite, very annoying also because it forms thin cobwebs especially on the underside of the leaves.

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Video: Transplanting Lisianthus Flowers into Cut Flower Garden - Growing Lisianthus in Zone 67 (May 2022).