Decorative potted and cut plants in a residential interior affect the mental and physical condition of people staying there.. The influence of plants on mood and well-being is related to their color, shape and arrangement in the composition; physical interaction – mainly with gas exchange of plants. In the process of photosynthesis, they absorb carbon dioxide during the day and release oxygen, and during the night vice versa – take up oxygen (less than they released him during the day) and they release carbon dioxide. In addition, they increase the humidity of the air in the room by evaporation. Some species, np. geranium (fragrant geranium), they produce essential oils and phytoncides, which have bactericidal properties, inhaled – have a positive effect on the human body. Other species (np. ferns) they ionize the air, increasing the number of desired negative ions. Mention should also be made, that many ornamental plants, contains poisonous substances, np.: petunia, winged tobacco, columbine, peonia (medical peony), narcissus, I cried, laburnum, ivy, naparstnica, difenbachia, oleander.
The first step should always be to diagonally trim the ends of the stems under water with a sharp knife. Additionally, the ends of the woody stems are cut into a cross or an asterisk. Crushing or firing of the ends of lignified stems is also used. Leaves, that could fall under water in the vase, must be removed, stems to the height of the flowers are immersed in water for 25…30 min. Then the vase, in which the plants are to be placed, fills up with lukewarm water. The finished composition should be placed away from direct sunlight, drafts, heaters and far from fruit trays. The water in the vase is changed once a day – twice on hot days. The ends of the stems should be washed and trimmed under water. You should also systematically remove fading flowers and dying leaves. Cut plants stay fresh longer in rooms with lower temperatures.