The gladiola flower, also known as gladiolus, can be any color except true blue. Caring for gladiolas is easiest in warm regions, though removing them at the first frost and replanting them in early spring enables gladiolas to thrive in cooler climates.
Planting
Gladiolas grow from corms rather than bulbs, and they are best suited to warm soil with good air circulation and plenty of sun. Plant gladiola corms 3 to 6 inches apart.
Water
Gladiolas require about 1 inch of water per week from rain or watering. More may be required in regions with hot summers.
Cut Flowers
As soon as the first flower has opened, gladiolas are ready to be cut. Cut stems at an angle in the morning, plunge them into water and enjoy one to two weeks of gladiola flowers indoors. Change vase water daily for longest bloom life.
Warning
The greatest threat to gladiola flowers is the gladioli thrip, a small, winged insect that drains plants and damages foliage and blossoms. Spray insecticidal soap weekly on gladiola plants to prevent thrip damage.
Storing & Replanting
Once frost has darkened gladiolas' leaves, remove their corms from the ground. Snip off the stems and treat the corms with insecticide and fungicide before storing them in a cool, dry place. Replant corms after all danger of frost has passed.
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