60x Gladiolus - MixLooking for gladioli with a twist? This gladiola mix is the perfect choice. The flowers are the ones we know the colours are unique! The gladioli attract butterflies. That completes the picture! Plant the tubers in the spring. The flowers bloom in the summer. 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. Place the gladioli in full sun.