Formal Decorative Dahlia 'Duet'


Family: Asteraceae (ass-ter-AY-see-ee) (Info)
Genus: Dahlia (DAHL-ya) (Info)
Cultivar: Duet
Hybridized by Scott
Registered or introduced: 1955
» View all varieties of Dahlias
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Flower Size:

Medium - 6 to 8 inches (150 to 200 mm) diameter

Bloom Color:


Red, Dark Red



Unknown - Tell us


36-48 in. (90-120 cm)


18-24 in. (45-60 cm)



Other details:

Unknown - Tell us

Soil pH requirements:

6.1 to 6.5 (mildly acidic)

6.6 to 7.5 (neutral)

Patent Information:

Unknown - Tell us

Propagation Methods:

By dividing rhizomes, tubers, corms or bulbs (including offsets)


Parts of plant are poisonous if ingested

Handling plant may cause skin irritation or allergic reaction

Seed Collecting:

N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed

Foliage Color:

Unknown - Tell us

Bloom Characteristics:

Flowers are good for cutting

Water Requirements:

Average Water Needs; Water regularly; do not overwater

Where to Grow:

Suitable for growing in containers


This plant has been said to grow in the following regions:


Birmingham, Alabama

Capitola, California

Chowchilla, California

Oakland, California

Santa Monica, California

Temecula, California

Winsted, Connecticut

Bartow, Florida

Ashley, Illinois

Dayton, Kentucky

Ewing, Kentucky

Halethorpe, Maryland

Chelmsford, Massachusetts

Norwell, Massachusetts

Grand Rapids, Michigan

Wrightstown, New Jersey

Roswell, New Mexico

Binghamton, New York

Saugerties, New York

Southold, New York

Woodside, New York

Corvallis, Oregon

Myrtle Beach, South Carolina

Freeport, Texas

League City, Texas

Farmington, Utah

Cathan, Washington

Kalama, Washington

Vancouver, Washington

Harpers Ferry, West Virginia

Appleton, Wisconsin

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Gardeners' Notes:


On Jun 28, 2013, TSTruax24 from Catonsville, MD wrote:

I bought Dahlia tubers to mix up the flower combinations in my walkway garden because I have never grown them. They say you can leave them in the ground over winter in my Zone (Zone 7). I have not had such luck thus dig them up when their leaves and blooms dye off which isnít until the first frost. And with the climate changing that might not be until December in Maryland now a days. I spent last summer disappointed from leaving them over winter and they didnít return, and so have learned if no leaf shoots donít come up in May then there will be no Dahlias. This year I have replaced my Amethyst colored ones with Marble ones similar to the pictures above. I have dead headed the top of the stalk about 22Ē up and it exploded with more leaves and flower buds. The Dahlia hasnít bloomed yet but ... read more


On Jul 5, 2009, WillowWasp from Jones Creek, TX (Zone 9a) wrote:

So far this is the only Dahlia that I have growing this year. I hope to add a few more as they seem to like it here even in our hot, hot summer. I have had a couple of others in the past but don't remember their names.


On Oct 3, 2007, mbgardener from Myrtle Beach, SC wrote:

I saw this beautiful flower at a nearby garden center and bought 2 plants. Transplanted them to 2 huge pots and set them in the garden...I followed advice from DG and have enjoyed many blooms all summer long...our winters here are short in myrtle beach so i hope to enjoy the dahlias well into early november i hope. ive been watering every other day with success and dead heading the blooms has kept me with beautiful blooms.


On Oct 1, 2007, mbhoakct76 from Winsted, CT wrote:

I to got one of these in a mix, the rest were white and boring but this flower made it worth it, they are very easy to grow, only bad part is here in CT the tubers have to be lifted for winter, I have left them out in winter and had about half return, but thats no guarentee. potting is easiest and they easily survive the winter in a pot kept in a cool basement.


On Aug 6, 2006, grannymarsh from Marquette, MI (Zone 5a) wrote:

Big, full blooms. Good bud count


On Sep 19, 2004, butterflydawn from Appleton, WI wrote:

Saw this gorgeous flower and HAD to have it. Planted 4 tubers mid-summer - all 4 are growing like mad. Has a lot of rich green foliage and many buds which are blooming a couple at a time. Very large flowers - average 6" diameter. Haven't watered it any - it's doing great on the rain that we've had (or not had recently). Soil has clay content. Full sun approx 6 hrs / day.


On Jul 11, 2003, jkom51 from Oakland, CA (Zone 9b) wrote:

I picked this dahlia up as an inexpensive 3-pak of tubers. Hoping to get at least one to grow, I potted them up separately and of course -- all three sprouted! I gave one away but kept the other two. They are extremely handsome dahlias and have garnered many compliments from visitors. Note that mine, at least, are the purple-red color, not a true red, so it shouldn't be planted near orange-colored flowers as the shades don't blend well.


On Oct 14, 2002, debi_z from Springfield, MA (Zone 6a) wrote:

i was lucky enough to get this gorgeous dahlia in a mixed bag of dinner plate size tubers at a local home center.
i planted them,in a part sun location and they thrived. i'll try a full sun location next year to see the difference in this strain.
the blooms last a long time.
for a vase, i cut them in the early morning and place into water about 120 degrees. i only guesstimated at the temperature and perhaps that is why they only lasted 2-3 days in the vase indoors, on the screened porch 4-5 days. i'll have to purchase a thermometer for next years flowers.

deadheading through the summer yielded many new blooms.
if you want the really large blooms cut off the other buds and the energy will go into making 1 big beautiful flower.


On Aug 3, 2002, mystic from Ewing, KY (Zone 6a) wrote:

I have really enjoyed this Dahlia the color is so intense and the blooms last along time. In warmer climates you maybe able to leave in the ground with heavy mulch. But for me in Zone 6 I have to dig the tubers before first frost. Clean and let dry good. Pack in dry peat and store in cool dry place.