🌱 Spaghetti Squash

Sowing window (UK)	April to May
Minimum soil temperature	12°C at seed depth
Sowing depth	3 cm
Spacing	120 cm apart
Days to germination	7 days
Days to harvest	110 days
Sowing method	Start under cover, transplant out
Frost hardy	No
Sun	full-sun
Watering	moderate
Plant family	Cucurbitaceae

When should I sow Spaghetti Squash in the UK?

In the UK, sow Spaghetti 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 - spaghetti squash will sit and rot in cold ground.

What soil temperature does Spaghetti Squash need to germinate?

Spaghetti 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 Spaghetti Squash?

For Spaghetti Squash, sow it 3cm deep and space plants 120cm apart.

How long does Spaghetti Squash take to grow?

Spaghetti Squash takes roughly 110 days from sowing to harvest. Seed usually germinates in about 7 days.

Is Spaghetti Squash frost hardy?

No. Spaghetti 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.