Sowing window (UK)April to June
Minimum soil temperature5°C at seed depth
Sowing depth1 cm
Spacing50 cm apart
Days to germination7 days
Days to harvest245 days
Sowing methodStart under cover, transplant out
Frost hardyYes
Sunfull-sun
Wateringmoderate
Plant familyBrassicaceae

When should I sow Kaibroc in the UK?

In the UK, sow Kaibroc from April to June. It is normally started under cover and transplanted. Wait until the soil has reached 5°C at seed depth rather than going by the calendar - kaibroc will sit and rot in cold ground.

What soil temperature does Kaibroc need to germinate?

Kaibroc needs a minimum soil temperature of 5°C at seed depth to germinate reliably. Below that, germination is slow and patchy, and seed is more likely to rot than sprout. Measure at around 5cm down, in the morning, rather than trusting air temperature.

How deep and how far apart should I sow Kaibroc?

For Kaibroc, sow it 1cm deep and space plants 50cm apart.

How long does Kaibroc take to grow?

Kaibroc takes roughly 245 days from sowing to harvest. Seed usually germinates in about 7 days.

Is Kaibroc frost hardy?

Yes. Kaibroc is frost hardy and will stand through UK frosts, so it can be left out over winter in most of the country.

Sowing data cross-checked against RHS growing guides and UK seed-merchant catalogues. Soil temperatures are the minimum for reliable germination, measured at seed depth.