leadingstar 20 Pcs Rare Purple Seeds Growth optimum temperature: 10-25 Centigrade The seed surface is 1-2 times the diameter of the seed. Cover seeds with preservative films,and then piercing the films to make several holes. Keep seeds covered in the daytime and uncover it in the night Take off the preservative films when the seeds are half-germinated The plant will be in a state of dormancy in summer and the leaves will turn yellow. Beginners should better use sand to cultivate the seeds.although the seeds will grow slower in the sand,the plants will be the most vigorous in the future.