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A picture of a Single Dahlia's

Single Dahlia's

Dahlia (1: Sin Group) 'Group 1 Single Types'

Dahlia Moonfire 1 by Stan Shebs (CC BY-SA 3.0)

Full Sun
Moderate care
Moderate watering
Half-hardy

H3

RHS hardiness

-5°C

Minimum temperature

Expected size

Height
Spread

1m

Max

50cm

50cm

Min

10cm

2 years to reach maturity

Flowering

  • spring
  • summer
  • autumn
  • winter

This plant has a mild fragrance

More images of Single Dahlia's

A close up of an orange flower of a single Dahlia type
A close up of the pink flowers of a single Dahlia type
A close up of the red, white and yellow flower of a single type dahlia 'Twyning's Smartie'

Single Dahlia's Overview

Single Dahlia's produce blooms that have a single outer ring of florets - that occasionally overlap - around a central disc, that superficially resemble daisies. These florets can be either flat or slightly curved and judges of professional shows look to see if the overlaps are all in the same direction. The central disc can have up to three rows or very small bright-yellow or orange coloured flowers. The florets can be a whole range of colours or a mixture of two, making them a perfect addition to flower borders to provide late summer colour architectural interest to almost all garden styles. Regular watering and cutting flowers from this plant will improve performance. These plants may need staking; however, pinching out the growing tips in early summer will help it develop a bushier habit. The genus Dahlia contains around 20,000 cultivars are predominantly derived from D. pinnata and D. coccinea. Most Dahlias are divided into groups based on the form of their flower heads, from dwarf varieties to tall bushes and even tree specimens. This group of cultivars can have the abbreviation (Sin) or the number 1 included in the name.

Common problems with Single Dahlia's

Dahlia tend to be affected by fungal diseases such as powdery mildew or grey mould if planted in poorly draining soil.

How to harvest Single Dahlia's

Flowers can be cut for floral arrangements as required.

How to propagate Single Dahlia's

Cuttings

In spring take soft-wood cuttings from the shoots appearing from stored tubers.

Division

Lifted clumps of Dahlia's can be divided in late winter, ensuring each section has an 'eye' (growing tip).

Special features of Single Dahlia's

Attractive flowers

Brings colour to the garden during autumn months.

Attracts useful insects

It attracts beneficial pollinators such as butterflies, bees and moths.

Pot plant

Can be grown in large containers.

Other uses of Single Dahlia's

Grown as bedding plants or for their flower heads, which are good for cutting or exhibition. Suitable for coastal conditions.