Sprouts - every self-respecting gardener grows them, because what is sold at the market is often not worth trusting. The seedlings there can be chunky, lively and healthy, but do not correspond to the type you want, and the seller with a sly grin nods affirmatively to any question about the variety. So why take risks, why overpay, why buy the "unknown what", it is better to grow seedlings with their own hands and then blame only themselves, or, conversely, to be proud of yourself. But the difficulty is that seedlings are often grown in the period (February-April), when the day outside the window is very short, when even the southern window sill, which can accommodate boxes with seedlings, can not save the situation. Light just catastrophically little and have to artificially add, that's why there are a variety of lamps dosvetki.
Today let's talk about how to grow full seedlings using artificial light, when and for how long to include lamps, which suit seedlings, and from what the yield will be little and, finally, touch the most reliable and proven types of lamps in different price categories. Let's see if we really need to chase an expensive brand or can do something inexpensive and familiar, but therefore no less effective. So, let's go into the world of light.
The need for extra light
First of all let's find out why in general the seedlings need extra light?
Light - this is almost the most important condition for the cultivation of seedlings. If there is not enough light, the complex photosynthesis apparatus of the plant simply will not work properly, and this will certainly have a negative effect on both the root system and the above-ground part. Plants can begin to stretch out in search of light, warp, they will fully or partially deplete their immunity, and of any quality seedlings, no yields in the future is out of the question, at best everything will be mediocre.
Let's say at once: if your window, on the window sill of which there is a street lamp of night light, then as soon as possible close the window with foil, so you save the plants from disorientation and provide more light to the plants in the "right" hours from the lamp of additional light. During daytime hours you should of course take away the foil, without switching off the extra light lamps if necessary.
What influence do the different spectra have on the seedlings?
We should point out at once that any one particular spectrum of light for the full development of seedlings of any culture is not enough. The effect on seedlings by additional supplementary light should be carried out by those lamps that emit exactly the complex of spectra (you can not in the whole range, but necessarily with the predominance of its most important components). In each spectrum almost every light stream has some effect on the plants, there is no part of the spectrum that can be considered completely useless. Subsequently the red spectrum as if directs the plant, literally gives it signals for normal growth and development, stimulates the vertical growth of seedlings.
Spectrum blue and violet are involved in the reduction of new cells, they activate the process of photosynthesis in plants, increase the rate of cell division. When the blue spectrum is sufficient, the cells do not elongate, retaining the typical shape for a particular plant species, respectively, there is no tendency for the seedling as a whole to elongate. Under the influence of this spectrum the stem of the plant becomes thicker and more dense, i.e. acquires typical size.
Few people know, but thanks to the influence of the blue light spectrum, the phenomenon of seedling stretching towards the light source, called phototropism, is substantially retarded, and seedlings have to turn another side of the light source twice, sometimes even three times less often.
With regard to spectra such as yellow and greenthe effect of them, of course, is there, but it is slight, this effect serves as a kind of balance, not allowing the excessive influence on plants of one or another spectrum, because excess is not a plus either.