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Swan Island Dahlias
Customer Service
(800) 410-6540 or
(503) 266-7711
Fax (503) 266-8768

Hours:
M-F 9:00AM-4:30PM (PST)
 (*June/July by appt. only)

Mailing Address:
PO Box 700
Canby, OR 97013

Physical Address:
995 NW 22nd Ave
Canby, OR 97013

  
 
Dahlia Classification

 

 

Classification Codes

Classification codes are a means to group the many varieties of dahlias that exist. You can find specific information on each of these types in the following:

 

 

 

Cactus Types

      

  • IC: Incurved Cactus- Petals rolled for their full length, with tips of the petals curving toward the center of the flower.

  • SC: Semi Cactus- Petals flat at the base, with less than half of the petals rolled or quilled.

  • C: Straight Cactus- Petals rolled for one-half their length, straight or nearly straight.

 

 

Decorative Types

    

  • FD: Formal Decorative- Flat petals with an even, regular placement throughout the flowers
  • ID: Informal Decorative- Generally flat petals, sometimes slightly rolled at the tips, but with irregular arrangement of formation.

 

 

Balls and Pom Pons

    

  • BA: Ball- Fully double flowers, ball-shaped or slightly flattened at the face, the ray florets blunt, rounded, or indented. Involute for most of their length, fully involute for about one-half their length, and normally displayed in a spiral arrangement.
  • P: Pom Pon- Fully double flowers almost round in shape with tightly quilled petals. Flower size 2" or less.

 


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Singles, Semi Doubles, Collarettes and Anemones

         

  • S: Single- Single row of flat petals surrounding a disc.
  • SD: Semi-Double- Two or more rows of petals surrounding a disc.
  • CO: Collarette- One row of flat or slightly cupped petals surrounding a disc. These flowers have an inner set of petaloids generally generally multiple and irregular forming a collar around the disc.
  • AN: Anemone- One or more rows of petals surrounding a dense group of colored, elongated disc florets.

  • MS: Mignon Single - single row of petals, with a flower diameter under 2"

 

 

Orchid & Peony
  • O: Orchid Type- Open centered flowers with one of ray florets surrounding a disc. The florets involute for two-thirds or more of their length. Usually partially overlapping.
  • PE: Peony type- Open centered flowers with two or more rows of petals surrounding a disc. Petals may be irregularly formed.

 

 

Waterlily
  • WL: Waterlily- Closed center with multiple rows of ray florets normally broad and flat or slightly incurved, depth usually less that one half the diameter.

 

Stellar

  • ST: Stellar- decorative shaped flowers with petals being creased causing them to be narrow and involute with a slight recurve to the stem.

 

 

Size Codes

Size codes denote the approximate size of dahlia blooms that the tuber will produce. The sizes and their codes are: 

  • AA: Flowers over 10" or more
  • A: Flowers 8" to 10" across
  • B: Flowers 6" to 8" across
  • BB: Flowers 4" to 6" across
  • M: Flowers up to 4" across
  • P: Flowers up to 2" across