Peony Dahlia 'Bishop of Llandaff'


Family: Asteraceae (ass-ter-AY-see-ee) (Info)
Genus: Dahlia (DAHL-ya) (Info)
Cultivar: Bishop of Llandaff
Hybridized by Treseder
Registered or introduced: 1928
» View all varieties of Dahlias



Flower Size:

Small - 4 to 6 inches (100 to 150 mm) diameter

Bloom Color:

Red, Dark Red


Do not disbud


24-36 in. (60-90 cm)

36-48 in. (90-120 cm)


18-24 in. (45-60 cm)


Grown for foliage


Other details:

Unknown - Tell us

Soil pH requirements:

6.1 to 6.5 (mildly acidic)

6.6 to 7.5 (neutral)

Patent Information:


Propagation Methods:

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


Parts of plant are poisonous if ingested

Seed Collecting:

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

Foliage Color:



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:


Atlanta, Georgia

Olathe, Kansas

Mandeville, Louisiana

Roslindale, Massachusetts

Keene, New Hampshire

Southold, New York

Columbus, Ohio

Grants Pass, Oregon

Portland, Oregon

Salem, Oregon

Allentown, Pennsylvania

Seattle, Washington

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Gardeners' Notes:


On Apr 13, 2015, wakingdream from Allentown, PA wrote:

I grew this variety for many years, digging and storing tubers in winter in my attached garage (around 50 degrees). Two years ago I lost the tubers in storage and I miss this plant. The dark stems and foliage are so elegant and make a lovely contrast in the border. I always started the tubers early, inside the house, in late March just to get a head start on blooming. The flowers are a gorgeous, bright red and help to make the fall gardens colorful. I deadheaded regularly to keep blossoms coming. Large bumblebees and orchard bees sleep in the wide open blossoms at night as though they are drunk on nectar. When I saved a seed head and grew out the seedlings, many different colors of Dahlias showed up. There were singles and doubles in yellow, red, wine, salmon, dark red. There were at le... read more


On Feb 7, 2014, coriaceous from ROSLINDALE, MA wrote:

A dahlia for those who usually dislike dahlias.

This is the cultivar that helped make dahlias fashionable again. The leaves are smaller and less coarse than with most dahlias, and their purple/chocolate color is immensely useful in the border. The flowers are small (about 3" across), semi-double, glowing scarlet/warm red, and produced in profusion.

I find that where well grown this routinely reaches 6' or more in height. That too makes it more useful.

Dahlias can cause skin rashes and stomach upsets in cats and dogs, but they are non-toxic to humans, and the tubers were grown as a root vegetable in Central America before Columbus.

Great for cutting, great for the border!


On Jun 30, 2007, girlgroupgirl wrote:

I was given this dahlia by a friend last year, to celebrate my Welsh heritage. It stayed fairly low, was rather floppy and did not produce many flowers. I was worried I had done something wrong! Dahlias do very well here, in general.
However, this year one Bishop is almost 6' tall, straight as an arrow and flowering it's fool head off. The other has remained 2' tall and was late to flower - and they are only a few feet apart.
But no worries, this is a GORGEOUS dahlia, and a beautiful accent in a tall, bright colored border. The foliage alone is worth growing it, and I would like to get others in the series!

This plant is hardy here.


On Feb 21, 2007, saya from Heerlen
Netherlands (Zone 8b) wrote:

Lovely striking Dahlia with very dark foliage.
Grower: Treseder, Ian & S Treseder & Sons (Great Britain), 1928


On Jul 2, 2004, langbr from Olathe, KS (Zone 6a) wrote:

Planted tubers in zone 6 garden on June 3rd and first blooms appeared on June 18th! A glorious and striking burgundy (near black) foliage. This is a peony type dahlia that is one of the parents of today's popular 'Bishop's Children' dahlias.

This cultivar is named for Bishop Hughes of Llandaff (now Cardiff), Wales, UK and was introduced in 1924. It won the prestigious Award of Merit from the RHS in 1928.

As with all dahlias it must be dug and stored in cool, dry place over winter in zones colder than 8.