Coossi Violet Rugosa Rose (Rosa rugosa) 5 seeds flower Garden The seeds are suitable for growing in sunlight with weak acid loosen fertile sandy soil. Good option for pots. The China Rose like sunshine, air circulation, good drainage and sheltered environment, and it need appropriate shade in hot summer. The optimum temperature of most species in day time is 15~26 and in night is 10~15 . It can bear the cold a bit, and it will sleep when air temperature is below 5 in winter. If heat continued for more than 30 in summer, then the majority of species will Reduce flowering, lower quality, access to semi-sleep state. General varieties resistant to -15  low temperature.