Crocosmia Care Must-Knows
Crocosmia is hardy in Zones 6 through 10. Some nurseries stock small crocosmia plants in nursery pots but the greatest selection of crocosmia cultivars is usually available as corms. These bulblike structures are planted in spring or fall. When planted in spring, they may not bloom until the following season. Plant crocosmia corms 3 to 5 inches deep and 6 to 8 inches apart in full sun and moist, well-drained soil that is rich in organic matter. Prior to planting, you may need to enrich the soil by incorporating a 2-inch layer of well-decomposed compost. For the best bloom show and quick, easy planting, plant a dozen or more of the same cultivar in a trench. Staking is sometimes required for the tallest crocosmia cultivars. Sink a stake into the ground near the corms and loosely tie about three flower stems to it using garden twine. Crocosmia is known for its ability to multiply quickly. Plan to dig and divide corms every three or four years in early spring just before growth starts. Replant the corms or share extras with friends.
Cut-Flower Tips
Crocosmia’s arching stems make it a unique addition to any flower arrangement. Give this plant extra care right after cutting and it will last for more than a week in a vase. First, cut stems when the first few flowers at the bottom of the spike are just opening. Remove the leaves from the stems and recut them. Immerse the stems in warm water up to the point where the flowers emerge. Place the vase in a cool, dark place for 48 hours, then move it to a bright spot and enjoy your handiwork.
More Varieties of Crocosmia
‘Ember Glow’ Crocosmia
Crocosmia x crocosmiiflora ‘Ember Glow’ has vibrant upward-facing scarlet flowers that open wide to reveal golden throats. Zones 6-9
‘Lucifer’ Crocosmia
Crocosmia ‘Lucifer’ offers arching spikes of scarlet flowers in mid- to late summer. It grows 3 to 4 feet tall. Zones 6-9
‘Meteore’ Crocosmia
Crocosmia ‘Meterore’ bears bright yellow-orange blooms with red throats. It grows 3 feet tall. Zones 6-10
