When to plant sweet potato in Auckland
Sweet potato is frost-tender, so every date keys off Auckland's last spring frost.
Step 1 · Sow
Direct sow outdoors
Dec 21 – Jan 11
Sow straight into warm, workable soil.
Step 2 · Harvest
Harvest window
Mar 21 – Apr 20
Picking runs until conditions turn against the crop.
Window
Days to maturity
90 – 120 d
From sowing to first pick.
Common questions
When can I sow sweet potato outdoors in Auckland?
Direct-sow around late December (Dec 21–Jan 11) in Auckland, based on its local frost dates. Confidence 44%.
When will sweet potato be ready to harvest in Auckland?
Expect to harvest from around late March (Mar 21–Apr 20) in Auckland, based on its local frost dates. Confidence 40%.
How long is the growing season in Auckland?
Auckland has roughly 365 frost-free days, which is enough time to grow sweet potato to maturity outdoors.
The rule of thumb
Sow sweet potato 6–8 weeks before your last spring frost; plant out 2–3 weeks after it. Every date on this page is derived from that rule and Auckland's frost dates.
Confidence 45/100 · Curated · based on NASA POWER (modeled) 1991–2020 · frost dates are probabilities, not guarantees.