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Montbretia Crocosmia x crocosmiiflora

Phonetic Spelling
kroh-KOZ-mee-ah BY kroh-koz-mee-ih-FLOR-ah
This plant is an invasive species in North Carolina
Description

Native to South Africa and produced in France, it is a hybrid of horticultural origin from two Crocosmia species, Crocosmia aurea and Crocosmia pottsii

Once cultivated as an ornamental, it has since become invasive, spreading in disturbed sites as well as wet grasslands, open woodlands, pastures, gardens, wastelands, and along roadsides.  It will compete for space with native plants, and has succeeded in displacing some natives by aggressively competing for water and nutrients.  As it spreads, the abundance of corms in the soil tends to break down the soil allowing erosion along creeks and riverbanks.  

The dramatic reddish-orange flowers of Crocosmia are exciting and eye-catching in the garden.  Flowers form in two rows along the branches at the stem top.  Each branch can have 4 to 20 flowers.  The flowers are yellow or reddish-orange with a yellow center.  Its tepals are fused together to form a tubular shape.  

The corms should be dug and divided every 2-3 years to maintain vigor.  Its corms can be round or flat and covered with brown fibrous layers.  

Propagation can be accomplished by division done just before the new growth begins.  Pruning is not required.  You may want to remove deal stems and leaves in the spring before new growing begins.

Insects, Diseases, and Other Plant Problems:  Maintenance is considered to be low, however, can be considered high due to its invasive nature.  Care should be taken when disposing of waste materials.

It can be affected by glasshouse red spider mites.

 

See this plant in the following landscape:
Cultivars / Varieties:
  • 'Solfatare'
    Apricot-yellow flowers.
  • 'Star of the East'
    Soft orange flowers
'Solfatare', 'Star of the East'
Tags:
#invasive#perennials#weedy#disease resistant#herbaceous#herbaceous perennials#long bloom time#long lifespan#naturalizes#cutting garden#clumping#naturalized area#herbaceous bulb#corm
 
Cultivars / Varieties:
  • 'Solfatare'
    Apricot-yellow flowers.
  • 'Star of the East'
    Soft orange flowers
'Solfatare', 'Star of the East'
Tags:
#invasive#perennials#weedy#disease resistant#herbaceous#herbaceous perennials#long bloom time#long lifespan#naturalizes#cutting garden#clumping#naturalized area#herbaceous bulb#corm
  • Attributes:
    Genus:
    Crocosmia
    Family:
    Iridaceae
    Uses (Ethnobotany):
    Home gardens
    Life Cycle:
    Perennial
    Recommended Propagation Strategy:
    Division
    Root Cutting
    Country Or Region Of Origin:
    South Africa
    Wildlife Value:
    Hummingbirds love the tubular shaped flowers.
    Play Value:
    Attractive Flowers
    Attracts Pollinators
    Colorful
    Easy to Grow
    Wildlife Larval Host
  • Whole Plant Traits:
    Plant Type:
    Perennial
    Woody Plant Leaf Characteristics:
    Deciduous
    Habit/Form:
    Arching
    Erect
    Growth Rate:
    Medium
    Maintenance:
    Low
    Texture:
    Medium
  • Cultural Conditions:
    Light:
    Full sun (6 or more hours of direct sunlight a day)
    Partial Shade (Direct sunlight only part of the day, 2-6 hours)
    Soil Texture:
    Clay
    High Organic Matter
    Sand
    Soil pH:
    Acid (<6.0)
    Alkaline (>8.0)
    Neutral (6.0-8.0)
    Soil Drainage:
    Good Drainage
    Moist
    Occasionally Dry
    Occasionally Wet
    Available Space To Plant:
    Less than 12 inches
    NC Region:
    Coastal
    Mountains
    Piedmont
    USDA Plant Hardiness Zone:
    5a, 5b, 6b, 6a, 7a, 7b, 8a, 8b, 9b, 9a
  • Fruit:
    Fruit Color:
    Brown/Copper
    Green
    Display/Harvest Time:
    Fall
    Fruit Type:
    Capsule
    Fruit Length:
    < 1 inch
    Fruit Width:
    < 1 inch
    Fruit Description:
    The fruit consists of a 3-lobed capsule that forms after the plant flowers. The green capsule matures to brown. It contains, shrivelled, triangular, red or brown seeds that may not be viable.
  • Flowers:
    Flower Color:
    Gold/Yellow
    Orange
    Red/Burgundy
    Flower Inflorescence:
    Corymb
    Spike
    Flower Value To Gardener:
    Good Cut
    Long Bloom Season
    Flower Bloom Time:
    Summer
    Flower Shape:
    Trumpet
    Tubular
    Flower Petals:
    6 petals/rays
    Flower Size:
    1-3 inches
    Flower Description:
    The zig zag rachis produces these two-toned orange/red/burgundy flowers perhaps lasting up to a month.
  • Leaves:
    Woody Plant Leaf Characteristics:
    Deciduous
    Leaf Color:
    Green
    Leaf Type:
    Sheath
    Leaf Arrangement:
    Other/more complex
    Leaf Shape:
    Lanceolate
    Leaf Margin:
    Entire
    Hairs Present:
    No
    Leaf Length:
    > 6 inches
    Leaf Width:
    1-3 inches
    Leaf Description:
    Its flat, sword shaped, bright green leaves can reach lengths of up to 40". They may be pleated at the base. Each corm will produce 6 to 12 leaves.
  • Stem:
    Stem Color:
    Green
    Stem Is Aromatic:
    No
    Stem Cross Section:
    Round
    Stem Form:
    Zig Zags
    Stem Description:
    The stems typically have a few branches near the tips.
  • Landscape:
    Landscape Location:
    Container
    Naturalized Area
    Patio
    Riparian
    Walkways
    Woodland
    Landscape Theme:
    Cottage Garden
    Cutting Garden
    Drought Tolerant Garden
    Design Feature:
    Border
    Mass Planting
    Attracts:
    Hummingbirds
    Resistance To Challenges:
    Diseases
    Dry Soil
    Problems:
    Invasive Species
    Weedy