THEMES

Torenia: cultivation and multiplication

Torenia: cultivation and multiplication

Plants that belong to the genus Torenia they are never very tall, usually not exceeding 30 centimeters, but they can have both an erect and bushy posture. They have stems with many branches covered with leaves with a lanceolate shape and light green color. These plants also produce flowers that we find grouped in racemic inflorescences. They have a trumpet shape with a lobed upper lip and a trefoil lower lip in the terminal part.

The genus Torenia belongs to the family of Scrofulariaceae, it includes both annual and perennial herbaceous plants, in most cases they are native to the wooded areas of Africa and tropical Asia where they also grow at high altitudes, up to a height of 3000 meters. A curiosity, before proceeding, about the name that refers to that of the clergyman e Swedish naturalist Olaf Toren. It was he who discovered Torenia asiatica in the eighteenth century.

Torenia: cultivation

Although they are very delicate plants, they do not need too much care and it is possible to breed them even without too much effort. These are plants even for those who don't have a green thumb or, at the very least, don't excel in gardening.

Let's start from the optimal position that can be both in semi shade and in full sun, depending on where we need to have these plants, often used to create hedges or borders given their tendency to be ground cover. The bushy habit of the Torenia makes them very suitable also as hanging plants to be inserted in hanging pots and which you want to see bloom.

They are absolutely to be avoided i water stagnation, very dangerous for this genus of plants. In spring and summer, however, it is very important to water them regularly so that their soil is never dry but always moderately humid. In autumn and winter, it is not necessary to wet these plants a lot, just check that the soil does not dry out.

For the Torenia no repotting is necessary because unfortunately these are plants with an annual cycle and, after flowering, they die. If we have to transplant them for our own reasons, we can still use a universal soil, with the addition of organic and well-draining substances, again to avoid water stagnation.

The fertilizer suitable for plants of this genus is the one with a high potassium content which favors flowering. It should be administered from spring to the end of summer, diluted in the water with which we water, once a week. This rhythm becomes necessary due to the fact that small vessels are often used and inevitably the available nutrients run out quickly.

To get gods flowering bushes it is best to prune these plants, pinching them, so that in spring inflorescences appear in abundance until the end of autumn. When the cold season arrives, once the flowering period is over, the plant dies.

Torenia: species

Among all the species belonging to the genus Torenia, the only one used for ornamental purposes is in fact the T. Fournieri. This plant is native to tropical Asia, has an annual cycle and produces flowers gathered in white inflorescences but spotted with lilac-blue. They are rather long flowers, even 4 centimeters, and have a throat yellow in color. The leaves of the Fournieri have small very long and serrated margins, are up to 5 centimeters long and 2. They are pale green in color and their shape is rounded and resembles that of a heart.

There are many varieties of this species, we can recall those most commonly used in our gardens. The T. Fournieri 'Grandiflora'Stands out for its particularly large flowers while the T. Fournieri' Alba 'for its white corolla with purple spots.

Torenia: multiplication

The multiplication of Torenia takes place by seed and usually a seedbed is used by planting the seeds around the month of February in a soil formed by coarse sand and fertile soil. We take a transparent sheet of plastic material so that the humidity remains constant and, at the same time, that the soil does not dry out quickly. The seedbed with seeds should be kept away from direct sunlight, the optimal temperature is that of 18 ° C and it is important that the level of humidity always remains medium-high, until the moment of germination. For this, it is recommended to spray the soil.

Every day we have to remove the plastic sheet which protects the soil to make sure that the environment in which the seeds grow is moist enough. In addition, the condensation that forms on the plastic every day must also be removed. Only when the seeds have finally germinated can we put the seedbed in a place with a lot of light, freeing it from the plastic sheet but being careful that the sun's rays do not arrive too directly.

When preparing seedlings in the seedbed it is important to leave room for those that grow stronger, eliminating the weaker ones. To transplant them into the ground you need to wait until they are large enough to then grow in pots of 12 cm in diameter, in groups of 5-10.

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Video: How to Plant and Care for Torenia Flowers or Wishbone Flowers for Ornamental Plants at Home (December 2021).