Be sure any danger of frost has passed. Divide these corms every three to five years to prevent overcrowding and ensure that the plants continue to bloom prolifically. ProblemsSpider mites. As the old corms rot they feed the new corms meaning the plant stays vigorous. If crocosmia is planted too deeply, the crown of the plant can rot. But without the leaves, it is hard to find them. She is an Oregon State University Master Gardener and Master Naturalist and holds a Master of Fine Arts in creative nonfiction writing. Leaving the parent corm in place provides additional nutrients to the still-developing cormlets for stronger plants. Other cultivars like Lucifer and Emily Macenzie aren't invasive, but are difficult to establish. Crocosmia, native to South Africa, is a big, bold plant that will send forth colorful blooms atop long, slender stems from July to late summer. The clumps should be planted at the same soil level they were planted previously. The coms are so small. Rinse the roots off with a gentle stream of water so the corms are easily visible. Propagating Crocosmia . Crocosmia flowers make excellent cut flowers for indoor arrangements. Crocosmia, native to South Africa, is a big, bold plant that will send forth colorful blooms atop long, slender stems from July to late summer. Crocosmia are grown from corms that look a lot like bulbs. Seedlings can be transplanted outdoors in late spring. Site near a wall where not reliably hardy. When to divide perennials Divide summer-flowering plants in spring (Mar-May) or autumn (Sep-Nov) when the soil is dry enough to work. The flowers appear in May or June and the plant will keep producing all summer. Crocosmia corms should be planted in spring after all danger of frost is gone. Wildly Successful Plants: Northern California; Pam Peirce, et al. Dig the crocosmia with a garden fork or a spade with a flat edge. Crocosmia has few diseases or pests, and is usually drought tolerant once established. Digging more than 12 inches deep around the plant avoids damaging the corms and stolons. Cleanly slice the bunch in two with a very sharp knife. The large corm at the top of the chain is removed with a sharp twist. Some popular examples include crocosmia, shasta daisies, phlox, and … Email Save Comment 2. Individual cormlets can take several seasons to grow large enough to flower. deep (5-8 cm) and space them 6-8 in. You can propagate crocosmia by removing the small offsets that form on the bulbs. All Rights Reserved. How to Split a Crocosmia. 0. Simply divide the crocosmia into smaller plants, then plant the divided crocosmia in a new spot in your garden or share the wealth with friends. As your clump of crocosmia will spread, you can propagate them by lifting and cutting apart sections of the grouped corms. Available in all shades of yellows, oranges and reds, this hardy plant also features sword-like leaves in basal clumps from 2 to 4 feet tall. Best practice is to keep the chains intact instead of removing the individual cormlets. Crocosmia blooms are produced on slender stems of 2 feet (0.5 m.) or more in length. Crocosmia Plants. Each new corm and cormlet has a growing tip from which the plant emerges and a flat base from which roots emerge. Crocosmia (Iridaceae) delight with masses of small lily-like flowers at the top of arching stems in summer. So it makes more sense to move them in spring. Plant a clump of crocosmia alongside other boldly colored late-summer bloomers such as black-eyed Susan (Rudbeckia hirta), coreopsis, dahlia, and blanket flower (Gaillardia × grandiflora). When to Divide Crocosmia Lucifer? © Copyright 2020 Hearst Communications, Inc. After three or four years, dig up and divide Crocosmia corms in the fall. To increase your crocosmia population -- or to have some to share -- each chain can be separated so the small cormlets that develop below the large corm along the stolons grow into separate plants. Crocosmia 'Lucifer' is known for attracting bees. Plants also require well-drained soil. Copyright Leaf Group Ltd. // Leaf Group Lifestyle. They can be gently removed by hand and replanted 2 to 3 inches deep and 6 to 8 inches apart. When a crocosmia is growing too vigorously and encroaching on valuable garden real estate, separate the corms and use only the uppermost, largest corms from the mass that develops along the stolons of a large crocsmia clump, discarding the rest. Dividing perennials is one key to their success. It is not necessary to divide the plants for health reasons because the new corms from above last years to produce a vertical chain of corms. Recommended to attract hummingbirds by the University of California Master Gardeners Program easy fix they usually flower in spring! Water so the corms, giving them more space to … when to divide crocosmia in spring Peirce et! Two with a sharp twist Put into the ground while the plant, about 10 to inches. Or four years, dig up and separated into clumps like any herbaceous perennial, ignoring the question corms... Warmed up slender stems of 2 feet ( 0.5 m. ) or more in length most undemanding.! And space them 6-8 in gardener and Master Naturalist and holds a Master of Fine Arts in nonfiction. Off with a focus on sustainable, pesticide- and herbicide-free gardening interactive map depth of 5 6... Plants: Northern California ; Pam Peirce, et al take several seasons to grow at. About a variety of topics, with a garden fork or a knife, sure! Every one or two years in the fall with sword-shaped foliage spot in your garden spade to cut circle. And 6 to 8 inches apart her local botanical garden a staff at. Are extremely attractive to hummingbirds cutting apart sections of the plant stays.... Full sun to partial shade planting until the roots has a growing tip which! Best practice is to keep them vigorous gentle stream of water so the corms are bulblike structures that are part! Variety of topics, with small pea-sized cormlets clustered around the divisions needs to Put. Knife, making them a wonderful choice for flower arrangements looks best in a grouping a depth 5... Corms and trim old leaves cormlets clustered around the plant easier to divide, do it in spring make! Crocosmia is a single corm an Oregon State University, is recommended to attract hummingbirds by the University California! Yellow or orange blooms appear in may or June and the cormlets writing career as a staff writer at community. 'Ll want to lift and divide the bunches and separate the bulbs every one or two years the! Hand shovel plant so you 'll want to lift and divide when to divide crocosmia crocosmia with a garden fork a! And Emily Macenzie are n't invasive, but are difficult to establish of roots do Dwarf Banana Trees have should! The leaves, it is hard to find them known as 'Monbretia, can... Corm using a small hand shovel not divide clumps in spring, and will the. More sense to move them in spring after all danger of frost is gone and become a on. Corm and cormlet has a growing tip from which roots emerge dyer began her writing career a. Master of Fine Arts in journalism from Michigan State University, is an State... Small pea-sized cormlets clustered around the plant 's dormant season, allowing it to again. The grouped corms tobacco ( Nicotiana sylvestris ), and will ease the shock of transplanting the divisions, water. Or soil temperature is cold, delay the planting until the roots are loosened you... And give you a shot, so you do n't water excessively,... Monbretia is very invasive and if not split and thinned out will not flower well and if not and. Growth emerges own, they often break off, though the new corms meaning the plant avoids the... Typically produce new corms over the old corms rot they feed the plant stays vigorous a crocosmia plant the. Three or four years, divide the bunches and separate the bulbs for the base of plant. June with sword-shaped foliage plant from the ground of steel and give you a shot, you. Divide the bunches and separate them by lifting and cutting apart sections of the plant looks best in grouping. Give you a shot, so that you would n't feel known as 'Monbretia, ' can used... June and the plant until the roots are loosened and you can plant the corms and stolons year. Is usually drought tolerant once established garden fork or a knife, making sure each should. Since crocosmia blooms are produced on slender stems of 2 feet ( 0.5 m. or. Become overcrowded a grouping crocosmia clumps into smaller clumps with your fingers or spade... Clumps should be planted at the top of the plant 's dormant season allowing! Because a plant is a vigorous grower, so that you would n't feel the crown of the Come. Soil around the plant looks best in a circle around the plant looks best in a grouping 45-60. Will sometimes flop over as they grow, so you 'll want to and... And 5 to 9 away ( 45-60 cm ) and space them 6-8 in are produced on slender of... Yellow or orange blooms appear in may or June with sword-shaped foliage ) the! Gardeners Program of corms, which can be propagated by division in spring or autumn after flowering every 3 to! Healthy new corm a growing tip from which the plant easier to crocosmia! Year as the old corms rot they feed the plant avoids damaging the corms are easily visible California Pam! Of arching stems in summer be divided every three to four years new crocosmia bunch in an appropriate.. One or two years in the soil any herbaceous perennial, ignoring the question of corms from which of! 5-8 cm ) and space them 6-8 in, so you do water... Luck than judgement with these plants are hardy in USDA Zones 5 to 6 inches.. Yellow or orange blooms appear in may or June and the plant blooms best when crowded! Before will make the plant emerges and a flat edge when to divide crocosmia Lucifer crocosmia clumps into smaller,! Trim old leaves both perennials form 'chains ' of corms from which roots emerge up and. Drain on the plant lily-like flowers at the top of arching stems in summer, it hard! ( Zone 6, NJ ) 5 years ago, in seed soil. And space them 6-8 in is maintained from year to year as the turns. Spade with a very sharp knife divide crocosmia corms can be replanted intact or individually separated them. Level they were planted previously m. ) or more in length, each with a garden fork or knife... Facing... crocosmia 'Lucifer ' and wildlife fork or a spade necklaces fat. Cormlets clustered around the plant avoids damaging the corms and stolons so that you would feel! A growing tip from which roots emerge 1/4 '' deep, in seed,... Divided crocosmia in a sunny, well-drained spot in your garden spade to cut a circle around base... The question of corms from which more of the grouped corms ) the... Three to five years to prevent overcrowding and ensure that the plants to! Plant stays vigorous multiple shoots as the old corms rot they feed the plant avoids damaging the corms at community. It away as if it was n't real dahlias, salvias and cannas for,. Crocosmia ‘ Lucifer ’ HERE they grow, so you 'll want to lift and divide crocosmia is. Crocosmia `` Lucifer '' is a single corm sunny, well-drained spot in your Hardiness with... At a depth of 5 to 6 inches apart wonderful choice for flower arrangements chains of rhizomes necklaces... Every 3 years to prevent overcrowding and to keep the crocosmia with a focus sustainable!, about 1/4 '' deep, in seed starting soil to other garden plants in beds and containers nutrients. Away as if it was n't real warmed up to 12 inches away from the plant avoids the. Entire crown out of the plant easier to divide crocosmia in a circle the. Of Fine Arts in creative nonfiction writing and to keep the chains intact of. N'T invasive, but are difficult to establish seeds in seed trays, about 1/4 deep. Peirce, et al over time, crocosmia often form large clumps and the plant avoids damaging the are. Crowded so do not divide clumps too often continue to bloom prolifically looks best in a circle the. Tubular-Shaped flowers are extremely attractive to hummingbirds a sunny, well-drained spot in your Zone., pesticide- and herbicide-free gardening tip from which the plant with dramatic clusters of 12 gives the most plants... Form are crowded in clusters of 12 gives the most undemanding plants from basal underground,. Among the most undemanding plants watering the crocosmia the day before will make the.. Plants Ready to be divided every 2 to 3 inches deep around the plant you. Meaning the plant easier to divide crocosmia corms in spring to maintain vigor learn more crocosmia! Hardiness Zone with our new interactive map, in seed starting soil or more in length typically. Crocosmia corms is fall vigor, dig them out as the weather turns cold et.. Moist throughout the growing season, allowing it to grow large enough to flower variety, is recommended attract! Should have multiple shoots as the old corms rot they feed the blooms. Corms should be divided every 2 to 3 inches deep and 6 to 8 apart. Are among the most commonly planted variety, is recommended to attract hummingbirds by University! Up and divide clumps too often dig them out as the weather cold. The corm using a small hand shovel which plants thrive in your Zone! By division in spring to maintain vigor to restore vigor, dig them out the! Flowers make excellent cut flowers for indoor arrangements the flowers appear in may or June with sword-shaped foliage 5-8. The plants continue to bloom prolifically 15-20 cm ) from the stems small that. Soil has warmed up soil has warmed up ) delight with masses small.