Armenian Speedwell

For the rockgarden, cushion plant. Mai-Juli. Z3-Z7. Height: 10 cm. Armenian Speedwell, violet-blue flower panicles, rich flowering, cushion plant.
Gram to get 1000 plants = 2,0 g. 
* Cold-germinators are still referred to as frost-germinators, although this is not quit correct. The sowing must be kept warm (about +18+22 °C) and moist for the first 2-4 weeks. After this period the sowing must be kept a cold temperature (between -4 and +4 °C) for another 4-6 weeks. It is not so important if  the temperature is higher or lower during the cooling period, but the cooling period has to be prolonged because the synthesis of  the germination inducer, hormon-like acid, slows down or comes to a standstill.
It is beneficial  to cover the sowing with snow during the cooling-period. The temperature below it usually keeps in the optimum range of -4 °C to 0 °C. The sowing is kept moist , and the melting snow helps to destroy the shell, which is advantageous for the germinating seedling. After this cooling-period the sowing may not be immediately exposed to high temperatures. The most effective temperatures are between +5 to +12 °C, even if germination has started. The best location for this sowing, even in March, April and May, is the open field, the cold frame or a cold greenhouse.

 
Armenian Speedwell.