The Main Plant entry for Dahlias (Dahlia)

This database entry exists to show plant data and photos that apply generically to all Dahlias.

General Plant Information (Edit)
Plant Habit: Herb/Forb
Life cycle: Perennial
Sun Requirements: Full Sun
Flowers: Showy
Resistances: Deer Resistant
Propagation: Other methods: Division
Other: Propagate by taking cuttings of newly emerged shoots
Containers: Suitable in 3 gallon or larger

Image
Common names
  • Dahlia

Photo Gallery
Location: The Park
Date: 2014-10-10
Blooms in October have much more yellow in them than earlier bloo
Location: The Park
Date: 2014-09-03
Still nothing at all like the stock photo that made me buy it.
Location: KALAMA WA
Location: In my garden in Kalama, Wa.
Date: Mid Summer
Location: My garden in Kalama, Wa. Zone 8
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Comments:
  • Posted by DeborahvanderBeek on May 20, 2020 4:02 AM concerning plant:
    Could we have estimated height of Dahlias under 'size' rather than just flower size? It makes a huge difference in planning where to put it.
    Happy to help when and where I can.
  • Posted by Marilyn (Kentucky - Zone 6a) on May 20, 2013 3:59 AM concerning plant:
    Taken from wikipedia's page at: http://en.wikipedia.org/wiki/D...

    "Dahlia is a genus of bushy, tuberous, herbaceous perennial plants native mainly in Mexico, but also Central America, and Colombia. A member of the Asteraceae or Compositae, dicotyledonous plants, related species include the sunflower, daisy, chrysanthemum and zinnia. There are at least 36 species of dahlia, with hybrids commonly grown as garden plants.

    Dahlias grow naturally in climates which do not experience frost (the tubers are hardy to USDA Zone 8), consequently they are not adapted to withstand sub-zero temperatures. However their tuberous nature enables them to survive periods of dormancy, and this characteristic means that gardeners in temperate climates with frosts can grow dahlias successfully, provided the tubers are lifted from the ground and stored in cool yet frost-free conditions during the winter. Planting the tubers quite deep (10 – 15 cm) also provides some protection. When in active growth, modern dahlia hybrids perform most successfully in well-watered yet free-draining soils, in situations receiving plenty of sunlight. Taller cultivars usually require some form of staking as they grow, and all garden dahlias need deadheading regularly, once flowering commences.

    Slugs and snails are serious pests in some parts of the world, particularly in spring when new growth is emerging through the soil. Earwigs can also disfigure the blooms. The other main pests likely to be encountered are aphids (usually on young stems and immature flower buds), red spider mite (causing foliage mottling and discolouration, worse in hot and dry conditions) and capsid bugs (resulting in contortion and holes at growing tips). Diseases affecting dahlias include powdery mildew, grey mould (Botrytis cinerea), verticillium wilt, dahlia smut (Entyloma calendulae f. dahliae), phytophthora and some plant viruses. Dahlias are a source of food for the larvae of some Lepidoptera species including Angle Shades, Common Swift, Ghost Moth and Large Yellow Underwing."

Plant Events from our members
chelle On October 25, 2014 Winterized
Dug in-ground plants for drying and storing. Seven or eight bags in crawlspace.
dragonfetti On March 25, 2015 Plant emerged
Just a small sprout so far.
dragonfetti On January 22, 2015 Obtained plant
Planted tubers in glass tulip bed
AndreA33 On April 30, 2016 Maintenance performed
Cuttings of unknown dahlias done on Place Pompidou
carolem On January 2, 2018 Bloomed
UncleWill On September 15, 2018 Obtained plant
Surface portions killed by hurricane. Left tubers in place.
MrsBinWY On March 23, 2018 Potted up
5
MrsBinWY On February 25, 2018 Seeds sown
Cactus Mix (commercial seeds from patrob to Lalambchop1 to me), 20 seeds (all) @ warm room temp
piksihk On March 16, 2021 Obtained plant
Middle of Round bed
Trade with Atia I.
paleohunter On June 18, 2022 Transplanted
paleohunter On April 7, 2022 Plant emerged
paleohunter On March 24, 2022 Seeds sown
Pompon Mix
paleohunter On March 6, 2022 Potted up
paleohunter On October 15, 2021 Cuttings stuck
dnrevel On May 27, 2022 Plant Ended (Removed, Died, Discarded, etc)
Winter Sowing dahlias did not sprout from seed.
dnrevel On March 3, 2022 Seeds sown
WS in jug. WS in jug. Ark of Taste says: Seeds are sown from February to July and transplanted after 3 weeks, full sun. When the plants reach a height of 30 cm, soil should be added to the base of the plants to encourage the development of tuberous roots. After about twelve weeks, dahlias will bloom for 4-6 weeks.

From TrueLove Seeds: When warm, germination should take 7-12 days. When the starts are about an inch tall, pot them up into 3" pots. Transplant them in the garden when they have filled in their pots and after the last danger of frost. Space plants in garden by 18-24". Trellis or stake as the plant grows tall.
» Post your own event for this plant

Discussion Threads about this plant
Thread Title Last Reply Replies
Beautiful!! by SongofJoy Nov 22, 2012 1:17 AM 1
Arabian Night? by frankrichards16 Nov 4, 2013 4:17 PM 9
Untitled by bamira Apr 16, 2015 7:46 PM 0
twyning´s smartie by bamira Apr 20, 2015 2:57 PM 3
Wizard of Oz by bamira Apr 16, 2015 8:16 PM 0
tag along by jmorth Sep 27, 2015 8:56 AM 3
Oh, wow! by chelle Oct 2, 2015 8:17 AM 0
Dahlia ID by Calif_Sue Jun 11, 2017 10:58 AM 1
Caption notes by Calif_Sue Aug 21, 2017 9:30 PM 2
ID question by eclayne Feb 10, 2018 1:16 PM 2
Image ID by DaylilySLP Oct 20, 2019 8:44 PM 1
Image ID by DaylilySLP Oct 24, 2019 2:58 PM 1
Questionable ID as 'Just Peachy' by arctangent Jan 7, 2020 8:16 AM 0
outstanding capture! by Tom_F_GA Apr 9, 2020 2:43 AM 1
Id? by Calif_Sue Sep 21, 2020 5:56 AM 4
Possible misidentification? by zuzu Sep 23, 2020 10:36 PM 2

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