Here is a video of the engine. There are marks on the ball to make it's rotation easier to see. You will notice that at the start I hold the ping-pong ball in my hand very briefly so the liquid nitrogen will boil and start the rotation quickly.
They can be planted in the spring around your last frost date. Gladioli bloom about 90 days (three months) after they sprout in spring, so the bloom time really depends on when you plant them. In warm climates, where they stay in the ground year-round, gladioli bloom anytime from late spring (deep South) to midsummer (middle South).
Gladiolus Hybrid Groups. Gladiolus hybrids included in the Nanus group begin to bloom in early summer. They produce two to three stems or spikes from one corm. The stems grow between 9 and 14 inches tall with three to five flowers open at the same time.Hybrids included in the Primulinus group begin to bloom in midsummer.ladioli are long-lasting cut flowers, but determining exactly how long they will last in a vase is difficult. Proper cutting, handling and care of the flowers make them last longer. Cut the flowers in the evening or late afternoon when the first two buds change color or begin to open.