• Person holding a pink bouquet of omega dahlia flowers in a garden setting
  • Person holding a pink bouquet of omega dahlia flowers in a garden setting
  • Person holding a pink bouquet of omega dahlia flowers in a garden setting
  • A cluster of dahlia tubers with dirt on the ready for planting.
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Ships Spring 2027

Dahlia Tubers (Semi-Cactus) - Omega

Quilled, twisted, and lacerated petals give each flower a playful appearance

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About the Variety

New

Key Features

Heat Tolerant
Prefers Moist Soil
Container Friendly
Attracts Bees
Attracts Butterflies
Fast Growing
Easy to Grow
Perfect for Cut Flowers
Perfect for Borders
Edible

Plant Details

BOTANICAL NAME

Dahlia 'Omega'

LIFE CYCLE

  • Perennial

SEED TYPE

  • Tuber

LIGHT REQUIREMENT

  • Full Sun

BLOOM SEASON

  • Summer through Fall

GROWTH HABIT

  • Upright

PLANT HEIGHT

  • 35 to 40 inches

PLANT TYPE

  • Semi-Cactus

COLOR

  • Pink
  • Orange
  • Yellow

Wow, there is nothing ordinary about Dahlia Omega. Smoky coral, rose-pink, mango, and yellow mingle across enormous blooms. Its semi-cactus form adds even more personality, with quilled petals that twist, curl, and finish in playfully lacerated tips. Dramatic yet remarkably versatile, Omega makes a spectacular focal flower, bringing incredible texture, movement, and warm color to summer bouquets.

  • • Impressive, oversized blooms create an eye-catching garden display
  • • Shifting hues pair easily with a wide range of bouquet color palettes
  • • Large plants produce long, strong stems ideal for cutting

Planting Information

PLANTING SEASON

  • Spring

SOWING METHOD

  • Direct Sow

PLANTING DEPTH

  • Deep Enough to Cover with 2 inches of Soil

WATER NEEDS

  • Average

PLANT SPACING

  • 12 to 18 inches

HARDINESS ZONES

  • 7
  • 8
  • 9
  • 10
  • 11

COVERAGE

Amount Recommended Coverage
2 Bulbs / Ships in Spring Up to 0.75 Sq. Ft
4 Bulbs / Ships in Spring Up to 1.5 Sq. Ft
8 Bulbs / Ships in Spring Up to 2.75 Sq. Ft

Planting Guide

View our Dahlia Planting Guide to learn more.

Ready to Grow

We guarantee that our seeds & bulbs will be true to type and ready to thrive. If something doesn't grow as expected, we will make it right. Questions? Call us at 855-440-2929

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    Dahlia Tubers (Semi-Cactus) - Omega FAQs

    When do I plant dahlia tubers?

    Think of planting your dahlias when you plant your tomatoes. Plant in spring after the danger of frost has passed and the soil has warmed to at least 60°F. In warmer climates, planting can begin earlier than in regions with colder springs.

    Can Omega Dahlia tubers be started indoors before planting?

    Yes. Start tubers indoors about 4 to 6 weeks before your last expected frost to give plants a head start. Use containers with good drainage and keep them in a warm, bright location until outdoor conditions are suitable for planting.

    Do dahlias need staking?

    Staking is recommended, particularly in windy locations or when plants become heavily loaded with flowers. Providing support early helps protect stems as the plant grows.

    What is the difference between semi-cactus and cactus dahlias?

    Both types feature pointed petals, but cactus dahlias have narrow petals that roll backward along more than half their length, creating a spiky appearance. Semi-cactus dahlias have broader petals that are rolled for less than half their length, giving the blooms a fuller, slightly softer appearance.

    Will dahlias come back every year?

    Dahlias are tender perennials that can overwinter in the ground in sufficiently warm climates with good drainage. In colder regions, tubers should be lifted after frost and stored in a cool, frost-free location until spring.

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