Photo of Dierama 'Cosmos' flower by Annie's Annuals & Perennials

Photo by Annie's Annuals & Perennials

Used with permission, all rights reserved.

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Dierama 'Cosmos'

Also Known As

  • Cosmos Angel's Fishing Rod

Plant type

bulb / corm / tuber

size

  • H: 3'-4'
  • W: 1'-2'

planting zones

  • 7a-10b

More Options

Dierama 'Cosmos' plant details

Dierama 'Cosmos' is a broadleaf evergreen or semi-evergreen bulb / corm / tuber with green foliage. In summer burgundy and purple flowers emerge. Features grassy texture. Grows well with sun and even moisture water. Drought tolerant once established. Does well in rich and well-drained soil. A good option if you're seeking something verticillium wilt resistant.

CHARACTERISTICS OF Dierama 'Cosmos'

Plant type: bulb / corm / tuber
Plant family: iridaceae
Foliage: evergreen or semi-evergreen green
Mature size: 1 FT - 2 FT - wide, 3 FT - 4 FT - tall
Flowers: burgundy and purple blooms in summer

GROWING CONDITIONS for Dierama 'Cosmos'

USDA Zones: 7a - 10b
Sun exposure: sun
Watering frequency: even moisture
Resistant to: verticillium wilt
Soil needs: rich and well-drained

Nursery contributed plant descriptions

A spectacular, newly discovered plant with dark burgundy-almost black bells. The original plant (from which the seeds come) was found growing in a batch of wild seed collected from the Drakenberg Mts. So we are actually not quite sure of the outcome (colo
Probably the darkest Wandflower available…bloom shades of purple, deep purple to raven (almost black). Flowers dangle from thin wands over evergreen swords of foliage 3-4’ off the ground, late summer to early fall. Well drained soils, sun and summer moisture will make this perennial happy
As deeply dark as the night sky! 'Cosmos' is the darkest Dierama out there, giving a richer & more stunning visage to a plant that's already over-the-top lust-worthy & dramatic. Come Summer, when the Dieramas begin their reign over the garden, there's not a soul in the nursery who isn't swayed by their delicate yet impressive display, a 3-4' abundance of long, thin dancing stems decked with myriad bells. Dieramas hail from the Eastern Cape of South Africa where rainfall occurs in the Summer, but they still thrive here in California. Once established, they're drought tolerant & evergreen, needing only occasional grooming (just pull the spent leaves & cut down faded flower stems, & top dress annually when the plants are in growth.) Especially heavy soils should be amended for drainage.
Very dark burgundy flowers that contrast nicely with the papery white bracts. 3-4' tall and quite rare.

Gardening facts about Dierama 'Cosmos' plant

How to Grow Dierama 'Cosmos'

  • Sun Exposure

    • sun
  • Water Needs

    • even moisture - drought tolerant
  • Soil Needs

    • well-drained
    • rich
  • Special Situation

    • verticillium wilt resistant

Features

  • Foliage Color

    • green
  • Flower Color

    • purple
    • burgundy
  • Flower Season

    • summer
  • Foliage Season

    • evergreen
    • semi-evergreen
  • Texture

    • grassy

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