Denis Conrado · CC BY-SA 3.0
Dahlia
Plant·Dahlia pinnata
Full sun
Sun
Medium
Water
Well-drained soil
Drainage
Zones 8–11
Hardiness
Dahlia (Dahlia pinnata) is a plant. It grows best in full sun and has moderate water needs.
Through the year
DormantLeafing outFlowering
Works well with
from wiki dataNo companions recorded.
WHAT IT NEEDS
Wants full sun
Needs moderate water
Needs well-drained soil
Prefers soil pH 6–7
Show moreShow less
Prefers loam, sandy loam soil
Struggles in compacted soil
Draws up potassium, phosphorus from deep in the soil
Adds a moderate amount of organic matter to the soil
WHAT IT GIVES
Gives mulch biomass (medium)
Gives nectar (attracts pollinators)
Provides potassium
Provides phosphorus
Attracts pollinators
HOW IT GROWS
SIZE & SPACING
Herbaceous
Height30–180 cm
Spacing60 cm (min 30 cm)
Root depthShallow
Width30–90 cm
Width figures are rough estimates, the most variable measurement in our data.
AI estimate · accuracy improves as growers contribute corrections.
HOW TO PROPAGATE
Propagate by tuber division, seed, cuttings
Difficulty
Establishes in about 1 yr
Doesn't self-seed on its own
Where this comes from
Parsed11 Sept 2026
ConfidenceNot recorded
Photograph Denis Conrado · CC BY-SA 3.0