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Summary
Physical Characteristics
Dahlia rosea is a PERENNIAL growing to 1.5 m (5ft).
See above for USDA hardiness. It is hardy to UK zone 9 and is frost tender. It is in flower from August to October. The species is hermaphrodite (has both male and female organs) and is pollinated by Insects.
Suitable for: light (sandy), medium (loamy) and heavy (clay) soils. Suitable pH: mildly acid, neutral and basic (mildly alkaline) soils. It cannot grow in the shade. It prefers moist soil.
UK Hardiness Map
US Hardiness Map
Synonyms
Plant Habitats
Cultivated Beds;
Edible Uses
Edible Parts: Flowers Root
Edible Uses: Condiment Sweetener
The flower petals are used in salads[2]. Root - cooked and used as a vegetable[61, 105]. A bitter flavour[200]. Inedible according to another report[2]. A sweet extract of the tuber, called 'dacopa', is used as a beverage or as a flavouring. It is mixed with hot or cold water and sprinkled on ice cream. Its naturally sweet mellow taste is said to combine the characteristics of coffee, tea and chocolate[183]. The root is rich in the starch inulin. Whilst not absorbed by the body, this starch can be converted into fructose, a sweetening substance suitable for diabetics to use[4, 61].
References More on Edible Uses
Medicinal Uses
Plants For A Future can not take any responsibility for any adverse effects from the use of plants. Always seek advice from a professional before using a plant medicinally.
Miscellany
A valuable and much needed drug was extracted from dahlia roots during the first world war[4]. No more information was given in the report[K].
References More on Medicinal Uses
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Other Uses
Dye Miscellany
Yellow and gold dyes are obtained from the flowers and seed heads[169].
Special Uses
References More on Other Uses
Cultivation details
Requires a deep rich soil and a sunny position[1], disliking shade[200]. The growing plant is very frost-tender, though the tubers are somewhat hardier. However, these tubers are not reliably hardy if left in the ground over winter in Britain[200]. They are best harvested after the foliage is killed off by frost and then stored in a cool but frost-free place over the winter, planting out in April/May[200]. A parent of the cultivated garden dahlia[1]. There is some confusion over this name, this entry might refer to D. hortensis or D. pinnata[200].
References Carbon Farming Information and Carbon Sequestration Information
Temperature Converter
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Plant Propagation
Seed - sow late winter to mid spring in a greenhouse. The seed usually germinates in 1 - 3 weeks at 20°c[164]. When they are large enough to handle, prick the seedlings out into individual pots and grow them on in the greenhouse for at least their first winter. Plant them out into their permanent positions in late spring or early summer, after the last expected frosts. Cuttings of young shoots in early spring. The tubers are usually brought into the greenhouse in late winter in order to encourage early growth and young basal shoots are removed as soon as they are large enough[200]. Division. The roots are usually harvested in the autumn. These can be divided into individual tubers when planting out in the spring. Each portion should have a growing point[200].
Other Names
If available other names are mentioned here
Native Range
Coming Soon
Weed Potential
Right plant wrong place. We are currently updating this section.
Please note that a plant may be invasive in one area but may not in your area so it’s worth checking.
Conservation Status
IUCN Red List of Threatened Plants Status :
Growth: S = slow M = medium F = fast. Soil: L = light (sandy) M = medium H = heavy (clay). pH: A = acid N = neutral B = basic (alkaline). Shade: F = full shade S = semi-shade N = no shade. Moisture: D = dry M = Moist We = wet Wa = water.
Expert comment
Author
Cav.
Botanical References
200
Links / References
For a list of references used on this page please go here
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