Dahlia
- Height × spread
- 0.25m – 2.5m × 0.25m – 1.5m
- Position
- Full sun
Availability
Generally available as bulbs in early Spring, plants in late Spring & Summer
Many plants are seasonal. Call 01234 567890 to check current stock.
About this plant
Amazing long lasting colour, in a huge range to brighten borders, pots and indoors as cut flowers. They bloom summer through to autumn. There's neat pom poms, spiky ones like sunbursts, frilly or daisy like, which are pollinator friendly. Heights from 30cm to 1.5m. Some have bronze foliage. They need winter protection. If slugs are a problem for you, plant Monarda or Peony instead.
- Flower colour
- Black, Brown, Cream, Green, Lavender, Lilac, Mauve, Orange, Peach, Pink, Purple, Red, Rose, Violet, White, Yellow
- Foliage colour
- Black, Brown, Green, Mahogany, Purple
- Variegated
- No
- Scent
- Yes, some varieties
- Shape
- Bell, Cube, Dome
- Height
- 0.25m – 2.5m
- Spread
- 0.25m – 1.5m
- Season of interest
- Spring, Summer, Autumn
- Evergreen
- Deciduous
- Garden style
- Small scale garden, Seaside garden, Scented garden, Exotic garden, Cottage garden, Conservatory
- Sun or shade
- Likes full sun, tolerates part shade
- Soil type
- Clay, Loam (normal)
- Soil pH
- Neutral
- Drainage
- Well drained soil
- Winter hardiness
- Varies, most are not hardy
- Borders & containers
- Borders
- Use for
- Bedding plant, Rabbit resistant, Bee attraction, Butterfly attraction
- Hazards
- No
AutumnNow
Autumn - late · Outdoors
Apply a deep protective mulch
Provide a deep protective mulch in autumn, spreading it around the plant and covering it to give it both nutrients and some protection against the weather.
A mulch is a covering that can: protect the soil surface from rain, heat and cold; deter weeds; provide nutrients. Organic indicates that material has vegetative origin e.g. manure, compost. Synthetics i.e. plastics, or stones are often called mulches.
Autumn · Planting
Lift before winter
Lift bulbs. tubers or rhizomes in autumn, to keep for the following year. Keep dry and in a frost-free location for the winter. Re-plant in spring.
Spring
Spring-Autumn · Outdoors
Water during dry periods
For plants in the ground, when there has been little or no rain for a period of 7-10 days and the soil is dry, give it a deep watering and repeat weekly until there is a downpour of rain. Check plants in pots more frequently, especially in hot weather.
Spring-Autumn · Planting
Protect from slugs & snails
Protect young plants and new growth from slugs; mature plants can withstand slugs though damage affects their appearance. Apply nematodes in Spring. Or sprinkle organic slug pellets thinly around plants. Barrier methods, eg copper tape, may help.
Summer
Summer - early · Outdoors
Apply slow release fertiliser
Apply a slow release fertiliser which is spread around the root area of the plants soon after they have come into growth. (Or apply a liquid feed at regular intervals throughout the growing season.)
This is a simple way to provide a nutrient boost as a single annual procedure.
Planting & general
Planting
Prune some varieties
Some plants within this genus have additional requirements for pruning. It is best to look up your specific plant, or the species it belongs to for pruning guidance.
Planting
Deadhead blooms during flowering season
Remove flowers as they turn brown and fade. Snip the stem just below the bloom. This will keep the plant tidy and encourage more flowers.
The removal of spent flowers encourages the plant to produce fresh ones, rather than spend its energy on the development of seeds.
Planting
Support some varieties
Some plants within this genus may require support for young plants and/or long stems. It is best to look up your specific plant for guidance, and/or check the label.
Compost · Planting
Multi-purpose compost
Use a good quality peat-free multi-purpose compost when growing in pots and containers.