Dahlia × hortensis
Dahlia
Photo: Diego Delso · CC BY-SA 3.0 · Source
This description was machine-translated.
Description
The Dahlia is a lush, flowering tuberous perennial that blooms from July until the first frost in a wide array of colors and flower forms. It produces excellent cut flowers and thrives in sunny beds. The tubers are not winter-hardy.
Care instructions
Plant the tubers in mid‑May (after the ice‑holy days, week 20) in a full‑sun location with nutrient‑rich soil. Water deeply during dry periods and support tall varieties with a stake. Regularly prune spent blooms to encourage continuous flowering. After the first frost in October, dig up the tubers, keep them dry and frost‑free over winter, and re‑plant in spring.
Soil & site
Soil pH
Soil type
humus-rich, well-drained, nutrient-rich, loamy
Feeding
Heavy feeder
Months
Apr–Aug
Propagation
Methods
- Division
- Cuttings
- From seed
Companion planting
Good neighbors
carrot family (Apiaceae)
Calendula and Tagetes next to carrots keep the carrot fly away with their scent.
For example Carrotcelery rootDillParsleyCarrot fennelCoriander and 19 more species in the catalogue
Source: classic companion planting (DACH-Gartenpraxis)
Rather not
nightshade family (Solanaceae)
Sunflowers release substances into the soil that inhibit potato tuber growth, and they also compete for water and nutrients.
For example PotatoTomatoSweet pepperCocktail tomatoEggplantCape gooseberry and 9 more species in the catalogue
Source: basic crop-rotation rule
Companion planting is partly traditional gardening lore. Where the reason is known, it is given.
Some of these explanations were machine-translated.
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From the magazine
Planting summer tubers in spring: dahlias and gladioli only after frost
Dahlias, gladioli and lilies go into the ground only after the last frosts. How to set summer tubers right and stake them from the start.
Overwintering dahlias and gladioli: dig up, dry, store
Dahlias and gladioli are not hardy. How to dig up the tubers in autumn, dry them properly, store them frost-free and divide them.