Stock · Saltillo, Coahuila, Mexico
When to sow stocks in Saltillo
Main outdoor window
30 Jan - 20 Feb
The window this page is built around.
Timed from last spring frost
13 February
In Saltillo, on your chosen risk.
Ready to pick
20 Apr - 20 May
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 Saltillo
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
19 Dec - 9 Jan
Eight weeks before your last frost, under cover or on a windowsill.
Plant out
30 Jan - 20 Feb
Two weeks before your last frost.
In flower
20 Apr - 20 May
Stocks through the year
Against the frost risk in Saltillo
Why these dates
Start indoors eight weeks before the last frost and plant out two weeks before it. Stocks need cool nights, below about 15C, for several weeks to initiate flower spikes, so early planting is not optional - a late-planted stock grows into a leafy plant that never blooms.
Hardy to about -8C. In zone 8 and warmer the sensible approach is autumn planting for late-winter flowers, and in hot climates it is a winter crop only.
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. Stocks are timed from 8 weeks before that frost for an indoor start, with planting out 2 weeks before it, and this page simply resolves those offsets against the frost date computed for Saltillo.
Hardiness is not the obstacle here. Saltillo is zone 9b, comfortably inside the range this crop is rated for, so an established plant should come through an average winter without protection.
The median frost-free season here is 297 days, against 80 to 110 days to first flower for this crop counted from planting out. That margin is what decides whether a late sowing is worth attempting.
Nearby
Stocks in places close by
Also in Saltillo
Other flowers to time
Growing stocks in Saltillo
When should I plant stocks in Saltillo?
Aim for 30 Jan - 20 Feb in an average year. If you would rather not gamble on the weather, wait until 25 Feb - 18 Mar - by then frost has finished in nine years out of ten.
When will stocks be ready to harvest in Saltillo?
Expect to start picking around 20 Apr - 20 May, based on 80 to 110 days to maturity from the planting date calculated for this location.
How much frost will stocks tolerate?
Hardy to about -8C. In zone 8 and warmer the sensible approach is autumn planting for late-winter flowers, and in hot climates it is a winter crop only.