🌱 Acorn Squash

Sowing window (UK)	April to May
Minimum soil temperature	12°C at seed depth
Sowing depth	3 cm
Spacing	150 cm apart
Days to germination	10 days
Days to harvest	100 days
Sowing method	Start under cover, transplant out
Frost hardy	No
Sun	full-sun
Watering	moderate
Plant family	Cucurbitaceae

When should I sow Acorn Squash in the UK?

In the UK, sow Acorn Squash from April to May. It is normally started under cover and transplanted. Wait until the soil has reached 12°C at seed depth rather than going by the calendar - acorn squash will sit and rot in cold ground.

What soil temperature does Acorn Squash need to germinate?

Acorn Squash needs a minimum soil temperature of 12°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 Acorn Squash?

For Acorn Squash, sow it 3cm deep and space plants 150cm apart.

How long does Acorn Squash take to grow?

Acorn Squash takes roughly 100 days from sowing to harvest. Seed usually germinates in about 10 days.

Is Acorn Squash frost hardy?

No. Acorn Squash 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.