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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)
Mailing Address:
PO Box 700
Canby, OR 97013
Physical Address:
995 NW 22nd Ave
Canby, OR 97013
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Home > Dahlia Classification
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Dahlia Classification
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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
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IC: Incurved Cactus- Petals rolled for their full length, with tips of the petals curving toward the center of the flower.
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SC: Semi Cactus- Petals flat at the base, with less than half of the petals rolled or quilled.
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C: Straight Cactus- Petals rolled for one-half their length, straight or nearly straight.
Decorative Types
 
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FD: Formal Decorative- Flat petals with an even, regular placement throughout the flowers
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ID: Informal Decorative- Generally flat petals, sometimes slightly rolled at the tips, but with irregular arrangement of formation.
Balls and Pom Pons
 
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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.
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P: Pom Pon- Fully double flowers almost round in shape with tightly quilled petals. Flower size 2"e; 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.
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"e; or more
- A: Flowers 8"e; to 10"e; across
- B: Flowers 6"e; to 8"e; across
- BB: Flowers 4"e; to 6"e; across
- M: Flowers up to 4"e; across
- P: Flowers up to 2"e; across
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