Dahlia - Mix 'Topmix'Wonderful in a bed or planter. The Top mix dahlia does not grow tall and so is perfect for those places. The flowers are all brightly coloured with a yellow centre. Plant the tubers in the spring. The flowers bloom in the summer and autumn. Space the tubers out when planting. The distance between plants is three times the width of the tuber. Plant the tuber the depth of three times the tuber's height. Put the dahlia in a sunny spot. Water the tuber