Rhubarb · Saltillo, Coahuila, Mexico
When to plant rhubarb in Saltillo
Main outdoor window
7 Dec - 30 Jan
The window this page is built around.
Timed from last spring frost
13 February
In Saltillo, on your chosen risk.
Ready to pick
1 Apr - 30 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 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.
Plant the crown
7 Dec - 30 Jan
Any time the plant is dormant and the ground is neither frozen nor waterlogged: after leaf fall in autumn, or at the end of winter before growth restarts.
Harvest
1 Apr - 30 Jun
Rhubarb through the year
Against the frost risk in Saltillo
Why these dates
Plant dormant crowns with the buds just at soil level. Take nothing at all in the first year and only lightly in the second - the plant is building a root system, and stripping it early stunts it permanently. After that, pull rather than cut, and stop by midsummer.
The crown is entirely hardy and actively wants the cold. Early stalks caught by a hard frost turn limp and should be discarded rather than eaten.
Rhubarb are planted once and then left in place, so there is no sowing offset to resolve. What matters in Saltillo is the shape of the year: this crop is dormant through the winter and is planted while it sleeps, any time between leaf fall in autumn and the restart of growth in spring, so long as the ground is neither frozen nor waterlogged. That is why the window below spans the cold months rather than sitting in the middle of the growing season.
Saltillo sits in zone 9b, which is milder than this crop wants, and a winter that never really arrives is its own problem. The dates below still describe the right time of year; the open question is survival rather than timing.
One caution specific to warm climates: this crop needs roughly 500 hours below 7.2°C (45°F)45°F (7.2°C) over winter before it will flower properly, and the coldest month in Saltillo averages 12.9°C (55.1°F)55.1°F (12.9°C). Low-chill varieties exist for exactly this situation and are worth seeking out by name.
Do not expect a crop in the first year. A plant set out now should give its first worthwhile pick around year 2, and will then produce every year after that, which is what makes the planting decision worth getting right the first time.
Nearby
Rhubarb in places close by
Also in Saltillo
Other fruits to time
Growing rhubarb in Saltillo
When should I plant rhubarb in Saltillo?
Aim for 7 Dec - 30 Jan in an average year. If you would rather not gamble on the weather, wait until 20 Nov - 25 Feb - by then frost has finished in nine years out of ten.
When will rhubarb be ready to harvest in Saltillo?
Expect to start picking around 1 Apr - 30 Jun, based on 60 to 90 days to maturity from the planting date calculated for this location.
How much frost will rhubarb tolerate?
The crown is entirely hardy and actively wants the cold. Early stalks caught by a hard frost turn limp and should be discarded rather than eaten.