• Purple pramie 18 dahlia up close showing all the petals
  • A cluster of dahlia tubers with dirt on the ready for planting.
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Ships Spring 2027

Dahlia Tubers (Decorative) - Pramie 18

Bred in 1948 and valued for its reliable garden performance

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About the Variety

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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 'Prämie 18'

LIFE CYCLE

  • Perennial

SEED TYPE

  • Tuber

LIGHT REQUIREMENT

  • Full Sun

BLOOM SEASON

  • Summer through Fall

GROWTH HABIT

  • Upright

PLANT HEIGHT

  • 48 inches

PLANT TYPE

  • Decorative

COLOR

  • Purple
  • White

Some dahlias are simply too good to go out of style. Heritage variety Dahlia Prämie 18 has stood the test of time with dramatic lilac-purple blooms finished in crisp white tips and edging. The high-contrast coloring makes each enormous flower easy to spot from across the garden, while its classic decorative form brings plenty of fullness and impact to indoor displays.

  • • Impressive blooms can reach up to 10 inches across
  • • Classic decorative form features broad, beautifully layered petals
  • • Plants create a commanding display four feet tall

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

  • 18 to 24 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.

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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 (Decorative) - Pramie 18 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.

    What is a decorative dahlia?

    Decorative dahlias feature fully double blooms with broad, relatively flat petals that overlap in lush layers, completely concealing the flower's center. Their blooms range from small to dinnerplate-sized, making them a popular choice.

    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.

    How can I encourage longer stems on Pramie 18 Dahlia?

    Provide full sun, adequate spacing, and consistent moisture to encourage vigorous growth. Pinching young plants promotes branching, while selectively removing side shoots and buds can help direct energy toward developing longer, stronger flowering stems.

    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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