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Arrowroot

Canna edulis

Also listed as Canna coccinea, Canna ascendens

Also known as Edible Canna, Queensland Arrowroot, African Arrowroot

herbaceous☀️ full sun💧💧💧 high water❄ Hardy: Zone 8a – Zone 11b

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A tropical perennial with bold, large green or bronze leaves and striking orange, red, or yellow flowers; grown primarily for its starchy edible rhizomes. The plant thrives in warm, wet conditions and makes an excellent ornamental and food crop in permaculture systems.

Why grow it

Canna edulis produces edible rhizomes with higher starch content than many tropical alternatives, making it a practical staple crop for warm-climate permaculture systems. Unlike cassava or taro, cannas tolerate temporary waterlogging and poor soil, which can reduce establishment time. The dual ornamental and food value means a single planting can serve aesthetic and productive roles, though rhizome yields tend to be modest compared to dedicated starch crops in optimal conditions.

Watch out for

Cannas establish slowly and require consistent warmth to thrive; in marginal climates, the growing season may be too short to develop harvestable rhizome size. The plant's preference for high moisture can lead to rhizome rot if drainage is poor, particularly in heavy clay soils. Harvest timing matters: rhizomes dug too early yield poorly, while late harvest risks frost damage in cooler regions.

Overview

Form
Upright
Growth Rate
fast
Size
3–6′ tall × 1.5–3′ wide
Dormancy
deciduous
Family
Cannaceae
EdibleBiomass and mulch

Native to the United States

Native Range

South America

Native to: Florida, Louisiana, South Carolina, Texas

Seasonality

Bloom Season

J
F
M
A
M
J
J
A
S
O
N
D

Harvest Season

J
F
M
A
M
J
J
A
S
O
N
D

Edible Parts

rootleafshoot

Season of Interest

SummerFall

Notable Cultivars

Canna edulis is the primary cultivated food variety, prized for large rhizome production, while ornamental Canna hybrids like 'Tropicanna' and 'Black Knight' are grown for vibrant foliage and flowers.

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Companion Planting

Plants well with