Safe to Plant

Blueberry · Najafgarh, Delhi, India

When to plant blueberries in Najafgarh

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not outdoors here

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Timed from last spring frost

7 January

In Najafgarh, on your chosen risk.

Ready to pick

1 Jul - 31 Aug

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 Najafgarh

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.

Harvest

1 Jul - 31 Aug

Frost tolerance
Very-hardy
First crop
Year 2
Chill needed
800 hours
Hardy to
Zone 3a–8a
Spacing
120 cm
Sun
Full

Blueberries through the year

Against the frost risk in Najafgarh

Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Frost risk Harvest Today

Why these dates

Plant dormant. In anything but naturally acid soil, grow in a container of ericaceous compost and water with rainwater rather than tap water - hard tap water raises the pH steadily until the leaves yellow and the plant stalls.

Extremely hardy in wood, to -25C or lower in the highbush types. The flowers open late enough that frost damage is uncommon.

Blueberries are planted once and then left in place, so there is no sowing offset to resolve. What matters in Najafgarh 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.

Najafgarh sits in zone 10b, 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) over winter before it will flower properly, and the coldest month in Najafgarh averages 14.5°C (58.1°F). 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.

See every crop timed for Najafgarh →

Growing blueberries in Najafgarh

When will blueberries be ready to harvest in Najafgarh?

Expect to start picking around 1 Jul - 31 Aug, based on 60 to 80 days to maturity from the planting date calculated for this location.

How much frost will blueberries tolerate?

Extremely hardy in wood, to -25C or lower in the highbush types. The flowers open late enough that frost damage is uncommon.