Gladiolus 'Flevo Jive'
Common Name: gladiolus 
Type: Bulb
Family: Iridaceae
Zone: 7 to 10
Height: 1.00 to 2.00 feet
Spread: 0.75 to 1.50 feet
Bloom Time: August to September
Bloom Description: White and yellow
Sun: Full sun
Water: Medium
Maintenance: Medium
Suggested Use: Annual
Flower: Showy

Culture

In St. Louis, corms must be lifted in fall each year. Although corms may be left in the ground year round in USDA Zones 7-10, it is generally believed that plants in these areas will flower best if corms are dug annually there as well. Best grown in humusy, medium wet, well-drained soils in full sun. Adapts to a wide range of soils except heavy clay. Site plants in locations protected from strong winds. Corms may be started indoors in early spring (for earlier bloom) or planted directly in the ground after last frost date. Plant at two week intervals until June to extend the bloom time. Plant corms 4-6” deep and 5-6” apart. Provide consistent moisture during the growing season, especially during dry summer periods, and do not allow soils to dry out. After bloom, reduce watering. After foliage yellows and before the first significant fall frost, dig up corms, cut off stems and leaves, separate cormels (small corms at the base), dry corms and cormels, discard any diseased or damaged corms and store remaining ones for winter in a dry medium in a cool, frost-free location. If fungal diseases have been a problem, consider dusting corms with a fungicide immediately prior to storage. Corms may also be planted in containers with corms stored for winter in the same manner as if they were planted in the ground.

Noteworthy Characteristics

Gladiolus is a genus of about 180 species of corm-bearing plants from mainly South Africa but also found in the Mediterranean, Arabian Peninsula, North West Africa and East Africa. The wide range of hybrids produce some of the showiest of summer garden flowers. They are also a mainstay in the florist trade.

Genus name comes from the Latin word for a small sword in allusion to the shape of the leaves. The plants are also sometimes called sword-lilies but people generally use the Latin plural gladioli.

'Flevo Jive' (Flevo is a trademark for a flowering group) is a compact gladiolus that grows to 12-24" tall. Short flower stems of this hybrid usually do not need staking or support. Funnel-shaped white and yellow flowers on slender scapes bloom bottom to top in mid-summer. Narrow, sword-shaped, medium green leaves grow in upright fans.

Problems

Susceptible to botrytis, crown rot, rust, wilt and mosaic virus. Watch for aphids, mealy bugs, spider mites and thrips. If thrips were a problem during the growing season, consider treating corms with an insecticide prior to storage.

Garden Uses

Beds, borders. Container plant for decks and patios.