The potatoes need irrigation and the best way is by drip irrigation.
First irrigation is before the germination by spray irirgation.
Second irrigation is in the beginning of the blossoming season.
Third irrigation is when the flowering is massive.
You have to irrigate regularly when the air temperature rises and holds like this and the soil is dry. You have to finish with the irrigation 20 days before colecting the crop.
Potato Vernalization
The vernalization is a process of acceleration of plant development by exposing seeds or bulbs to cold temperatures.
The potato vernalization starts 35-40 days before planting. You have to darken the room and rise the temperature to 8-12°С. The air humidity has to be 85-90%. On the 10-12 day the germs reach 1.5-2sm length. When 70-80% of the germs reach 2sm, you have to lighten the room and keep the same temperature and air humidity. You have to repeat the process after 25-30 days for 15-20 days with temperature 2-5°С.
The planting of the early potatoes is with temperature 6-7°С in the soil deep 10sm. For South Bulgaria the optimal dates are 20 February-10 March and 20 March-5 April for North Bulgaria.
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