Common sunflower Helianthus annuus

Exposure Common sunflower
The Common sunflower should be grown in a bright place, with direct sunlight. These plants have an annual development, therefore when it becomes cold they deteriorate, and get completely eradicated.The Common sunflower should be grown outdoors; it can bear very harsh temperatures without any problems, even many degrees below zero.

Generalities Common sunflower
These plants give origin to a brush with a rounded form. The Common sunflower is medium in size and 2,5 m in height; in the spring, summer, autumn, winter it assumes a yellow colouring. These plants aren't evergreens, which means they lose their leaves some months during the year. The Common sunflower have a one or two year development cycle.

Fertilization Common sunflower
Annual plants have a quite vigorous development and need, during the spring, a continuous fertilization; when placing them let’s add some humus or mature manure or some slow release granular fertilizer to the ground. During the spring months we suggest mixing some fertilizer for flowering plants to the irrigating water every 20-30 days.

Watering Common sunflower
Water rarely, about once every 1-2 weeks with 2-3 glasses of water , keeping the soil dry for a few days before watering again; when wetting we suggest avoiding surpluses, however to wet the soil deep down. As the cold weather arrives, in autumn, usually waterings is interrupted because these plants can't bear harsh temperatures.

Treatments Common sunflower
Generally during this time of year we suggest a pre-emptive treatment with wide range insecticide and with a systemic fungicide, to prevent the attack from part of the aphids and the development of fungus diseases, often favoured by a mild and damp climate.

Soil Common sunflower
We advise locating these annual plants in a dissolved soil, with an elevated drainage.

Climate peat sand Soil Pumice Bark S. Organic alpine 3 0 3 0 2 1 continental 2 0 3 0 2 1 mediterranean 1 0 3 0 2 1

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Notes Common sunflower
There aren't any notes. The indications given in this article are related to a medium size plant.

Correlate arguments Annual plants - Helianthus Annual plants - Helianthus Annual plants - Helianthus annuus Annual plants - Helianthus annuus Annual plants - Helianthus x multiflorus

This page concerns the weather continental it is possible to choose another climate area alpine mediterranean

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