Crocosmia bulbs are popular and attractive flowering bulbs. They are native to South Africa and crocosmia bulbs are members of the Iris family. Crocosmia bulbs are very easy to grow. The plants grow two to four feet tall in a season. Tube shaped flower colors include red, yellow, orange-yellow, and orange with splotches. Crocosmia bulb flowers bloom from July-October. Crocosmia bulbs grow well in the flower garden and in containers on patios or decks.
While people talk about Crocosmia "bulbs", they are really grown from corms. The corms are best planted in the fall for blooms the following spring.
Crocosmia can also be started from seeds. Plants seeds in seed trays, about 2 cm deep, in seed starting soil. Seedlings can be transplanted outdoors in late spring.
After three or four years, dig up and divide Crocosmia bulbs in the fall. Replant the bulbs, giving them more space to grow big and bright blooms next year.
Crocosmia bulbs are easy to grow. They grow best in full sun. Plant in in rich, loose garden soil. If the soil is heavy or doesn't drain well, mix in a generous amount of sand. Plant corms four to five inches deep, and four inches apart. Water during planting, only if the soil is dry. Keep soil moist, not wet. Add fertilizer only if the soil is poor.
Plants will grow 60 cm tall, and begin to produce flowers in the summer. If growing Crocosmia bulbs in containers, select a large pot with drainage holes. Keep well watered. Add fertilizer regularly for best growth.
After the plants have died back in the fall, they can be cut and removed to the ground. In cold areas, add a generous amount of mulch to protect the corms from freezing. Or, dig them up and store them for replanting in the spring.