When to plant onion in Miami
Miami is frost-free, so onion's dates key off the local wet and dry seasons and monthly temperatures — not a frost date.
Step 1 · Sow
Direct sow outdoors
Nov 1 – Jan 31
Sow straight into warm, workable soil.
Step 2 · Harvest
Harvest window
Jan 30 – May 21
Picking runs until conditions turn against the crop.
Window
Days to maturity
90 – 110 d
From sowing to first pick.
Common questions
When can I sow onion outdoors in Miami?
Direct-sow around early November (Nov 1–Jan 31) in Miami, based on its local frost dates. Confidence 67%.
When will onion be ready to harvest in Miami?
Expect to harvest from around late January (Jan 30–May 21) in Miami, based on its local frost dates. Confidence 60%.
The rule of thumb
Miami never frosts, so timing is about heat and the wet/dry seasons, not frost. Sow onion into its window above and keep it watered. Every date here is modelled from Miami's monthly climate normals, not frost dates.
Confidence 67/100 · Curated · based on NASA POWER (modeled) 1991–2020 · modelled from climate normals.