Safe to Plant

Hellebore · Brussels, Brussels Capital, Belgium

When to sow hellebores in Brussels

Main outdoor window

15 Nov - 30 Mar

The window this page is built around.

Timed from last spring frost

13 April

In Brussels, on your chosen risk.

Ready to pick

1 Jan - 31 Mar

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 Brussels

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 out

15 Nov - 30 Mar

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.

In flower

1 Jan - 31 Mar

Frost tolerance
Very-hardy
Damaged below
-25°C (-13°F)
First crop
Year 2
Hardy to
Zone 4a–8a
Spacing
45 cm
Sowing depth
20 mm (0.8 in)
Sun
Partial

Hellebores through the year

Against the frost risk in Brussels

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

Frost risk Plant Harvest Today

Why these dates

Plant in autumn or early spring, in shade under deciduous shrubs. Cut every old leaf off at the base in midwinter as the flower buds appear: it removes the leaf-spot fungus and makes the flowers visible, and it is the one piece of maintenance the plant genuinely needs.

Hardy to -25C. Open flowers droop alarmingly in a hard frost and lift again undamaged when it thaws. Needs winter cold and cool summer shade; it will not persist in a hot climate.

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

Brussels sits in zone 8b, 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.

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 Brussels →

Nearby

Hellebores in places close by

Growing hellebores in Brussels

When should I plant hellebores in Brussels?

Aim for 15 Nov - 30 Mar in an average year. If you would rather not gamble on the weather, wait until 21 Oct - 9 Apr - by then frost has finished in nine years out of ten.

When will hellebores be ready to harvest in Brussels?

Expect to start picking around 1 Jan - 31 Mar, based on 150 to 190 days to maturity from the planting date calculated for this location.

How much frost will hellebores tolerate?

Hardy to -25C. Open flowers droop alarmingly in a hard frost and lift again undamaged when it thaws. Needs winter cold and cool summer shade; it will not persist in a hot climate.