Blackcurrant · Ho Chi Minh City, Ho Chi Minh City (HCMC), Vietnam
When to plant blackcurrants in Ho Chi Minh City
Main outdoor window
not outdoors here
The window this page is built around.
Timed from last spring frost
no spring frost
In Ho Chi Minh City, on your chosen risk.
First autumn frost
no autumn frost
The far end of the outdoor season.
The average last frost. Half of all years are later than this.
Step by step in Ho Chi Minh City
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.
Blackcurrants through the year
Against the frost risk in Ho Chi Minh City
Why these dates
Plant dormant, and plant deep - 5 cm lower than the nursery mark - which encourages new shoots from below ground. Blackcurrant is the one soft fruit that genuinely benefits from being buried.
Very hardy. The flowers open early and can be caught by frost in a cold spring, which shows up as a bare patch at the base of an otherwise full strig.
Blackcurrants are planted once and then left in place, so there is no sowing offset to resolve. What matters in Ho Chi Minh City 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.
Ho Chi Minh City sits in zone 13a, 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 800 hours below 7.2°C (45°F)45°F (7.2°C) over winter before it will flower properly, and the coldest month in Ho Chi Minh City averages 25.9°C (78.5°F)78.5°F (25.9°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.
Also in Ho Chi Minh City
Other fruits to time
Growing blackcurrants in Ho Chi Minh City
How much frost will blackcurrants tolerate?
Very hardy. The flowers open early and can be caught by frost in a cold spring, which shows up as a bare patch at the base of an otherwise full strig.