Shiso · Córdoba, Andalusia, Spain
When to plant shiso in Córdoba
Main outdoor window
4-25 Mar
The window this page is built around.
Timed from last spring frost
25 February
In Córdoba, on your chosen risk.
Ready to pick
20 May - 9 Jun
If you plant at the start of the window.
The average last frost. Half of all years are later than this.
Step by step in Córdoba
Each window is a range, not a single day. Earlier in the range buys you a longer season; later in it buys you a safer one.
Start indoors
14 Jan - 4 Feb
Six weeks before your last frost, under cover or on a windowsill.
Sow direct
4-25 Mar
One week after your last frost.
Plant out
11 Mar - 1 Apr
Two weeks after your last frost.
Harvest
20 May - 9 Jun
Shiso through the year
Against the frost risk in Córdoba
Why these dates
Killed by the first frost, like basil.
Seed packets and extension guides express timing as weeks either side of the last spring frost, because that is the only reference point that travels. Shiso are timed from 6 weeks before that frost for an indoor start, with planting out 2 weeks after it, and this page simply resolves those offsets against the frost date computed for Córdoba.
The median frost-free season here is 285 days, against 70 to 90 days to maturity for this crop counted from planting out. That margin is what decides whether a late sowing is worth attempting.
Growing shiso in Córdoba
When should I plant shiso in Córdoba?
Aim for 4-25 Mar in an average year. If you would rather not gamble on the weather, wait until 25 Mar - 15 Apr - by then frost has finished in nine years out of ten.
When will shiso be ready to harvest in Córdoba?
Expect to start picking around 20 May - 9 Jun, based on 70 to 90 days to maturity from the planting date calculated for this location.
How much frost will shiso tolerate?
Killed by the first frost, like basil.