Zone 11 · Squash Growing Guide

When to Plant Butternut Squash
in Zone 11

The king of winter squash. Long shelf life (up to 6 months), sweet nutty flavour, and one plant produces 3–5 large squash. Needs room to sprawl — give it space.

Plant outdoors
Sep – Dec
Start indoors
Direct sow
Last Frost
~none
Days to harvest
80–100 days
Difficulty
Easy
Late season — Zone 11
Harvest window: Jan – Mar

Planting Calendar

In Zone 11, Butternut Squash should be planted outdoors Sep – Dec, after the average last frost date of approximately none.

Cool season planting only. Very challenging in Zone 11 heat.

Care Guide

Sunlight
Full sun · 6–8 hrs/day
Watering
Moderate
Spacing
36–48 inches
Soil
Rich, well-draining, compost-amended
Days to maturity
80–100 days
Soil pH
6.0–7.5
plant tip · Zone 11

Cool season planting only. Very challenging in Zone 11 heat.

Feeding Schedule

How often
monthly
Feed type
balanced then high potassium
Key timing
switch to high-potassium when fruit sets

Long season crop. Feed at planting, again at flowering, then switch to potassium-rich feed once fruit is sizing up.

Companion Planting for Butternut Squash

What you plant next to butternut squash makes a real difference — some plants actively help, others compete or attract pests.

Grows well with
  • Beans
  • Corn
  • Nasturtiums
Keep away from
  • Potatoes
  • Brassicas
  • Fennel

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Common questions

In Zone 11, butternut squash is a fall-planted crop. Plant outdoors Sep – Dec once temperatures cool in autumn. It overwinters and is ready to harvest around Jan – Mar. No last frost consideration — plant before the ground freezes.
Zone 11 has an average last spring frost of approximately none and a first fall frost around none. These dates vary by specific location — use your ZIP code in the plant app for precision based on the nearest NOAA weather station.
Good companion crops for butternut squash include Beans, Corn, Nasturtiums. Avoid planting near Potatoes, Brassicas, Fennel, which can compete for nutrients or attract pests.
Butternut Squash typically takes 80–100 days from transplant or direct sow to harvest in Zone 11. Expected harvest window: Jan – Mar.

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Butternut Squash in other zones
Crop Guides