Dahlia


2 entries found.
Dahlia
Common Name: Dahlia
Botanical Name: Dahlia spp. (DAL-ya or DAHL-ee-a)
Decorative Life: 4-10 days.
Post Harvest Care:
  • Remove bottom leaves if present, recut stems in air or under water and place into a fresh flower food solution. A hydration pretreatment may also be beneficial as a way to help rid the stems of microbes, which in turn may help to extend their vaselife in flower food.
  • The use of floral foam does not decrease vaselife.
Harvest Instructions: Plugs can be stored for 2 weeks in the dark (5 weeks in light) at 41F and subsequently grow into very acceptable plants and/or flowers. There is some data suggesting that flowers should be harvested when nearly fully open. Other data indicates that various bud harvested stages work equally well, depending on cultivar. If harvested when the flowers are 50% open, they respond well to flower food solutions containing 2-4% sucrose.
Family Roots:
  • Member of the Asteraceae or Compositae (aster or sunflower family).
  • Native to Mexico, Central America and Colombia
  • Related species include sunflower, daisy, chrysanthemum, zinnia.
Personality:
  • Flower forms are variable, one head per stem. Flower diameters range from 4-6" to 10 inches.
  • Stems are leafy, 12-24 inches long.
  • Plant is a herbaceous perennial from tuberous roots, classed as a dicotyledon, leaves not parallel veined.
  • Flowers of most species and cultivars are not fragrant.
Availability: Summer through fall.
Flower Color: Most, except blue.
Storage Specifics: If need be, store at 34-38F. Storage is not recommended or if need be, only for a short period. Storage for one week at 34f can reduce vaselife by about 20-30%.
Tidbits:
  • Flower types as designated by the American Dahlia Society include: single, anemone, colarette, peony, formal decorative, informal decorative, ball, pompon, incurved cactus, straight cactus, semicactus, miscellaneous.
  • Named after Swedish botanist, Anders Dahl (1751-1789), but are called "georginas" in eastern Europe in honor of Russian botanist, Johann Georgi. The American Academy of Allergy, Asthma and Immunology list this species as an allergy-safe pollen producing plant.
  • Dahlias were grown by the Aztecs, who called them cocoxochitl. They used them for ornament and for the edible tuberous roots.
  • Very large flowers can be floated on water, as their stems are often too weak to support the flower weight.
  • Dahlias have underground storage structures called tuberous roots and were once investigated as a potato substitute. The Compositae or aster family is vast, with over 20,000 species, and is also one of the most developed families. It was named Compositae because the flowers are actually a "composite" of many individual flowers into one head. Hence, when children pull one "petal" off at a time, saying "she/he loves me, loves me not", they are actually removing a complete flower, not just a petal.
Recent Findings: Eason et.al, (2002) found that storage temperatures between 32 and 47F were equal as far as influencing vaselife of 6 cultivars when stored for 7 days.
Personal Experiences: You list Dahlias as "Flower forms are variable, one head per stem. Flower diameters range from 4-6" to 10 inches". Patio dahlias can have flowers as small as 1" whilst Pompon flowers are 1 - 2 inches and Giants (Dinner plate dahlias) can reach 15 inches. Many of the newer Cut flower varieties can last up to (and beyond) 14 days in the right conditions, if conditioned properly. David Hill, Abacus Nurseries
Dahlia
Common Name: Dahlia
Botanical Name: Dahlia spp. (DAL-ya or DAHL-ee-a)
Decorative Life: Four to five weeks depending on cultivar and how the plant is maintained under interior conditions, especially light.
Harvest Instructions: Harvest when first flowers begin to open. Plugs can be stored for 2 weeks in the dark (5 weeks in light) at 41F and subsequently grow into very acceptable plants and/or flowers.
Family Roots:
  • Member of the Asteraceae or Compositae (aster or sunflower family).
  • Native to Mexico, Central America and Colombia.
  • Some common relatives include sunflower, daisy, chrysanthemum, zinnia, lettuce, endive and strawflower.
Personality:
  • Flower forms are variable, one head per stem. Flower diameters range from 4-6" to 10 inches.
  • Stems are leafy, 12-24 inches long, sometimes hollow and not very strong.
  • Plant is a herbaceous perennial from tuberous roots, classed as a dicotyledon, leaves not parallel veined.
  • Flowers are mostly not very fragrant.
Availability: Summer through fall to year-round.
Flower Color: Most colors except blue, often bicolored.
Storage Specifics: Possibly at 32-38F but more research is likely needed. However, storage is not recommended.
Tidbits:
  • Flower types as designated by the American Dahlia Society include: single, anemone, colarette, peony, formal decorative, informal decorative, ball, pompon, incurved cactus, straight cactus, semicactus, miscellaneous.
  • Named after Swedish botanist, Anders Dahl (1751-1789), but are called "georginas" in eastern Europe in honor of Russian botanist, Johann Georgi. The American Academy of Allergy, Asthma and Immunology list this species as an allergy-safe pollen producing plant.
  • Dahlias were grown by the Aztecs, who called them cocoxochitl. They used them for ornament and for the edible tuberous roots.
  • Needs almost full sun for best results. Some favorite cultivars and their respective flower colors include 'Figaro' (orange, red, violet, white, yellow), 'Redskin (mixed flower colors, bronze foliage) and 'Diablo' (dark leaves, many flower colors). Harvest when nearly fully open.
  • Dahlias have underground storage structures called tuberous roots and were once investigated as a potato substitute. The Compositae or aster family is vast, with over 20,000 species, and is also one of the most developed families. It was named Compositae because the flowers are actually a "composite" of many individual flowers into one head. Hence, when children pull one "petal" off at a time, saying "she/he loves me, loves me not", they are actually removing a complete flower, not just a petal.