For improvement of productivity of strawberry use both organic, and mineral fertilizers. Before landing in the soil bring peat and humus and also the full mineral fertilizer which is not containing chlorine.
Preparation of the soil
If the last two years the soil was not fertilized, its preparation is begun in 2 months prior to jumping of strawberry. The soil is dug over on shovel bayonet, bring peat and humus in number of 5-8 kg/sq.m and also full mineral fertilizer without chlorine (40-50 g/sq.m).
In the first year introduce nitrogen fertilizer. If clay soil, it is done in the fall, on light soil — in the spring. During active blossoming and fructification recommend not to fertilize strawberry.
Organic fertilizers
Manure is used only in the rerotting look, fresh contains large number of seeds of weeds which will begin to sprout in the soil. Humus - completely decayed manure turned into friable dark weight will provide strawberry with necessary nutrients, it is better acquired by plants. Chicken dung — good source of nitrogen. For preparation of fertilizer do weak solution, take one part of chicken dung and about 20 parts of water. It is necessary to water only the earth and to watch carefully that solution did not get on leaves. One of available fertilizing for strawberry — wood ashes, it can be brought in a dry form, scattering from above, so the plant will suffer less from wreckers. It is possible to make solution and to water bushes, using about 0.5 l under each bush, such solution is especially useful to strawberry in the fall.
Mineral fertilizers
The best effect I render complex mineral fertilizers, they contain nitrogen, potassium, phosphorus and magnesium. Potassium increases storage life of berry and improves its flavoring properties. The main sign of lack of potassium — the ends of leaves of strawberry of boring color. Wood ashes, sulfate of potassium and potassium saltpeter are suitable for completion of its shortcoming. Potash and phosphoric fertilizers bring in the spring under bushes. Nitrogen contains in urea and ammonium nitrate. Urea is easily dissolved in water, preparation of 10 liters of solution requires 1 tablespoon. The first time introduce fertilizer in the early spring, having removed all dry escapes and leaves. Under each bush beat out 0.5 l of solution. It is not necessary to abuse it fertilizer, its surplus can lead to loss of sugar in berry.
Leaving after harvest
The fertilizing, most important for strawberry — after harvesting. At this time strawberry needs good power supply for formation of new kidneys and roots. The soil is carefully loosened in row-spacings on depth of 10 cm, at the same time it is impossible to loosen directly about bushes, it is so possible to damage root system. Then introduce full mineral fertilizer at the rate of 20-30 g on 1 sq.m. Best of all for these purposes special fertilizers are suitable for strawberry, they contain all necessary elements in the balanced look, the ammofosk can also use. Besides phosphorus, nitrogen and potassium, sulfur, magnesium and calcium is its part. It is necessary to avoid chlorine-containing fertilizers, strawberry does not transfer chlorine. Humus introduction also yields good result, it not only fertilize the soil, but also improves its structure.