Cosmea cultivation: how to do it?

Cosmea cultivation: how to do it?

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The cosmee are pleasant herbaceous plants, attributable to the family of compositae or asteraceae, grown mainly in ornamental purpose, both to be placed in the garden and to be placed in a vase.

Although in reality the genre is characterized by a long series of annual and perennial plants, with different shapes and colors, in this in-depth analysis we will try to treat the theme with greater homogeneity and synthesis, allowing you to get a complete overview of this topic, and then leaving you the pleasure of deepening it with the experts in the sector.

What is cosmos and how it looks

Before understanding how you can effectively cultivate cosmea, let us introduce it remembering that, in many parts of the world, it is commonly renamed with the name of astro of Mexico.

Its appearance has stems covered by small elongated and divided leaves, with a color that tends to light or dark green, depending on the reference species.

The flowers, simple or double, instead have a corolla that is characterized by the presence of large petals, with a color that varies from White all 'Orange, from the pink to the red darker. The central disc has instead a more "stable" color, yellow.

How cosmea is grown

Having clarified what cosmea is and what its main characteristics are, let's take a small step forward in order to better understand how this flower is grown, which blooms in summer, until September (in some places in Italy, the flowering goes even in early October).

That said, it is good to immediately note that there cosmea loves sunny places, sheltered from the winds. The soil must be loose, well drained, not particularly fertile, mixed with sand.

As far as watering is concerned, this flower does not need a lot of water. However, in dry periods it is still advisable to carry out some regular watering, making sure that they are not too abundant, considering that it is harmful to create a condition of stagnation.

Moving on to fertilization, experts suggest proceeding with liquid fertilizer once every 20 days, using products made specifically for flowering plants, which can be easily purchased on the market in any gardening shop. The liquid fertilizer will generally be diluted in water, according to the doses recommended by the manufacturer (always read the recommendations for use!).

How cosmoses reproduce

Cosmoses reproduce through sowing. The sowing should be carried out by broadcasting during the spring season, covering the seeds with a thin (about one centimeter) layer of sowing soil, then wetting them.

During the month of April or May, when the seedlings have already reached a significant size for this purpose, they can be transplanted to the ground or into a pot, depending on your choices and possibilities. Repotting will take place during the spring season.

The care of the cosmoses

Cosmoses are a good choice for budding gardeners who don't have much time to devote to this cultivation, considering that it is very hardy plants, which are rarely affected by parasites and external agents.

Either way, this doesn't mean you can forget to pay attention to them! Although less common than other plant species, it is still possible that this plant is the object of attack by aphids and scale insects.

Precisely for this reason it is always advisable to carry out periodic weeding and topping of the withered flowers. Plants can be used for mixed borders and cut flowers.

Is cosmea dangerous?

There cosmea is poisonous and it is toxic if ingested, both in humans and in pets. Therefore, it is good to avoid that your dogs or other animals can end up in contact with the cosmos bipinnatus plant.


Summarizing some of the main evaluations that we have formulated in the previous lines, we point out how the cosmea is an annual floriferous plant, rather easy to grow and resistant, which can acclimatize positively in our regions, and which can be grown practically anywhere, provided that it is carried out sowing activity during the spring season (late), when the temperature is significantly higher than the typical winter ones.

The appearance of the cosmosis is quite elegant, and even if the stems are slender and thin, it is good not to be deceived: the plant is quite rustic and can accompany your garden or flowerbed for a long time with its beauty.

Finally, remember, in addition to the suggestions we have already exposed in the last lines, that the cosmos prefers rather sunny exposures, and that it can however develop quite well even in dim conditions. Avoid overwatering but, during the driest period, don't be afraid to water regularly, especially if the soil has a tendency to dry out. Naturally avoids excesses and, therefore, stagnation of water.

Video: Cosmea magic (June 2022).


  1. Kigajora

    I believe that you are making a mistake. Let's discuss this.

  2. Vokasa

    Do everyone's personal go off today?

  3. Alafin

    I congratulate, your idea is useful

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