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Collerette Dahlia's

Dahlia (3: Col Group) 'Group 3 Collerette Types'

Full Sun
Moderate care
Moderate watering


USDA zone


Minimum temperature

Expected size








2 years to reach maturity


  • spring
  • summer
  • autumn
  • winter

This plant has no fragrance

Collerette Dahlia's Overview

Collerette Dahlia's are beautiful compact perennials that produce blooms which have a flattened outer ring of overlapping ray florets (petals) around a ring of smaller florets that form a 'Collar' around the central disc. Group 3 Collerette Dahlia types come in a range of colours and are perfect for adding to flower borders to provide late summer colour and 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 (Col) or the number 3 included in the name.

Common problems with Collerette 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 Collerette Dahlia's

Flowers can be cut as required for floral arrangements.

How to propagate Collerette Dahlia's


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


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

Special features of Collerette Dahlia's

Attractive flowers

Brings colour to the garden during autumn months.

Attracts butterflies

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

Pot plant

Can be grown in large containers.