Root layer · Warm-season root / vine crop
Kūmara
Ipomoea batatas
A warm-season root crop and sprawling groundcover. Central to Māori and Pacific gardens; needs heat and a frost-free growing window.
Also known as: Kūmara, Sweet potato
Layer
Root layer
Climate
Subtropical, Warm temperate
Sun
Full sun and heat.
Water
Moderate; even moisture while vines run; ease before harvest for some growers.
Soil
Free-draining fertile sandy loam; raised ridges help on heavier soils.
Size
0.2–0.4 m vines H · Spreading 1–3 m W
Growth
Fast in heat
Frost
Very frost tender; tops and tubers damaged by frost.
Edible uses
Tubers, Young tips (culinary in some traditions)
Harvest window
Autumn before frost
Ecological functions
Seasonal groundcover · Soil shading in summer
Wildlife value
Seasonal cover
Human uses
Staple root crop · Storage kai
Propagation
Sprouted tubers / slips.
Maintenance
Plant after frost; ridge soil; harvest before cold; cure tubers for storage where practised.
NZ growing notes
Best with long warm summers — northern and coastal warm-temperate districts. Cool short seasons reduce tuber size.
In the food forest
Kūmara is a summer root crop and living groundcover in warm food forest clearings. Give it sun and free drainage; do not bury it under dense shade.
Establishment
Raise slips after frost risk. Plant into ridges of fertile free-draining soil. Water while establishing. Harvest before autumn frost and cure for storage if that is your practice.
NZ honesty
Honest in warm northern and coastal districts. Cool short summers limit tubers — local proof beats catalogue enthusiasm.
Suitable NZ regions
Companion plants
Related guilds
References
- NZ kūmara growing practice — Heat units and frost-free days drive yield.