Dahlia Classification: A Guide to Different Types of Dahlias

Dahlias are a beloved flower with a wide variety of types and classifications. Each type exhibits unique characteristics that make it special. In this article, we’ll explore the different classifications of dahlias, helping you discover the perfect dahlia for your garden or floral arrangements.

Cactus Types

IC: Incurved Cactus – These dahlias have petals that are rolled for their full length, with the tips curving towards the center of the flower. They create a stunning, eye-catching display with their striking shape.

SC: Semi Cactus – The petals of semi cactus dahlias are flat at the base, with less than half of the petals rolled or quilled. This type of dahlia offers a balance between the intricate cactus form and a more relaxed appearance.

C: Straight Cactus – With petals rolled for one-half their length, straight or nearly straight, straight cactus dahlias exude elegance. They possess a sleek and streamlined look that adds sophistication to any floral arrangement.

Decorative Types

FD: Formal Decorative – Formal decorative dahlias boast flat petals with an even, regular placement throughout the flowers. They create a sense of grace and refinement, making them perfect for formal occasions.

ID: Informal Decorative – Informal decorative dahlias have petals that are generally flat, sometimes slightly rolled at the tips. Their irregular arrangement gives them a charming, relaxed appearance.

Balls and Pom Pons

BA: Ball – Ball dahlias are fully double flowers that are ball-shaped or slightly flattened at the face. The ray florets are blunt, rounded, or indented, creating a unique texture. They are often displayed in a captivating spiral arrangement.

P: Pom Pon – Pom pon dahlias are fully double flowers that are almost round in shape, with tightly quilled petals. These petite flowers, typically 2″ in size or smaller, are incredibly charming.

Singles, Semi Doubles, Collarettes, and Anemones

S: Single – Single dahlias feature a single row of flat petals surrounding a disc. This simple, yet elegant, arrangement highlights the beauty of each individual petal.

SD: Semi-Double – Semi-double dahlias have two or more rows of petals surrounding a disc. They offer a fuller appearance while still maintaining the delicate charm of the single variety.

CO: Collarette – Collarette dahlias have one row of flat or slightly cupped petals surrounding a disc. These flowers have an inner set of petaloid, forming a collar around the disc. Their unique structure adds intrigue and visual interest.

AN: Anemone – Anemone dahlias boast one or more rows of petals surrounding a dense group of colored, elongated disc florets. This creates a striking contrast between the outer petals and the central disc, making them a captivating choice.

MS: Mignon Single – Mignon single dahlias feature a single row of petals, with a flower diameter under 2″. These petite blooms are charming and delicate, perfect for adding a touch of elegance to any arrangement.

Orchid & Peony Types

O: Orchid Type – Orchid-type dahlias have open-centered flowers with one of the ray florets surrounding a disc. The florets involute for two-thirds or more of their length, and they usually overlap partially. This unique form creates a stunning display reminiscent of orchid blossoms.

PE: Peony Type – Peony-type dahlias feature open-centered flowers with two or more rows of petals surrounding a disc. The petals may be irregularly formed, adding a touch of whimsy to their appearance.

Waterlily

WL: Waterlily – Waterlily dahlias have a closed center with multiple rows of ray florets. Their petals are normally broad and flat or slightly incurved. The depth of the flower is usually less than half the diameter, creating a delicate and enchanting look.

Stellar

ST: Stellar – Stellar dahlias have decorative-shaped flowers with petals that are creased, causing them to be narrow and involute. They also exhibit a slight recurve to the stem, adding a unique touch to their overall appearance.

Size Codes

Size codes are used to denote the approximate size of dahlia blooms that a tuber will produce. Here are the common sizes and their corresponding codes:

  • AA: Giant, over 10 inches in diameter
  • A: Large, 8-10 inches in diameter
  • B: Medium, 6-8 inches in diameter
  • BB: Small, 4-6 inches in diameter
  • M: Miniature, 3-4 inches in diameter

Now that you’re familiar with the different types of dahlias, you can select the perfect varieties to create stunning floral displays or enhance your garden. Embrace the diversity of dahlias and let their beauty brighten your day!