🌽 Sweetcorn 'Lark'

Sowing window (UK)	April to May
Minimum soil temperature	10°C at seed depth
Sowing depth	3 cm
Spacing	45 cm apart
Days to germination	10 days
Days to harvest	112 days
Sowing method	Start under cover, transplant out
Frost hardy	No
Sun	full-sun
Watering	moderate
Plant family	Poaceae

When should I sow Sweetcorn 'Lark' in the UK?

In the UK, sow Sweetcorn 'Lark' from April to May. It is normally started under cover and transplanted. Wait until the soil has reached 10°C at seed depth rather than going by the calendar - sweetcorn will sit and rot in cold ground.

What soil temperature does Sweetcorn 'Lark' need to germinate?

Sweetcorn 'Lark' needs a minimum soil temperature of 10°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 Sweetcorn 'Lark'?

For Sweetcorn 'Lark', sow it 3cm deep and space plants 45cm apart.

How long does Sweetcorn 'Lark' take to grow?

Sweetcorn 'Lark' takes roughly 112 days from sowing to harvest. Seed usually germinates in about 10 days.

Is Sweetcorn 'Lark' frost hardy?

No. Sweetcorn 'Lark' is not frost hardy. Do not put it outside until the risk of frost has passed in your area, and be ready to fleece it if a late frost is forecast.

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.