Orange Summer

Winter Squash

Zone 4b Save Garden

🌱 90d to harvest Vine

Sunlit and unmistakable, Orange Summer winter squash brings a rich, glowing orange flesh that tastes sweet and mellow with a velv…

Crop Dates

Milestone	Date
Start Indoors	Direct Sow
Last Frost	May 13th
Transplant / Sow Outdoors	Jun 10th
Harvest Begins	Sep 8th
Harvest Ends	Sep 27th

Crop Details

Trait	Value
Days to Maturity	90
Sun Requirements	Full Sun
Growth Habit	Vine
Support Needed	Trellis
Planting Depth	Normal
Germination Temp (°F)	70
Min Soil Temp (°F)	65
Min Night Temp (°F)	55
Harden Off (days)	10

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Frequently Asked Questions

What pest or disease commonly affects Cucurbita maxima (Orange Summer) and how can I control it?

Cucurbita maxima often gets powdery mildew, especially in warm weather with humid nights. Start prevention early by spacing plants for airflow and watering at the soil line (not the leaves), then treat at the first white spotting with a labeled sulfur or potassium bicarbonate spray, repeating as directed. If vines are badly affected, remove heavily diseased leaves so the canopy can stay dry and reduce further spread.

How often should I water Orange Summer (Cucurbita maxima) during peak growth?

During the main vine-and-fruit growth phase, keep soil consistently moist but not waterlogged—aim for about 1 inch of water per week, delivered in deep soaks. Water 1–2 times per week depending on heat and soil type, letting the top 1–2 inches dry slightly between waterings to prevent fruit rot and fungal spread. Once fruits reach full size, reduce frequency so the rinds cure more firmly and the fruit is less prone to rot.

How do I know when Orange Summer (Cucurbita maxima) is ready to harvest?

Harvest at about 90 days when the rind is fully colored, hard enough that it resists a fingernail, and the stem starts to dry and turn corky. Use a thumbnail test on the fruit’s skin—if it doesn’t dent easily, it’s ready. Cut with a sharp knife leaving 2–3 inches of stem, and cure in a warm, dry place for about a week to improve storage.

Sunlit and unmistakable, Orange Summer winter squash brings a rich, glowing orange flesh that tastes sweet and mellow with a velvety, spoon-ready texture. The rind matures to a handsome, deep orange with a sturdy, long-keeping finish, making it a dependable centerpiece for the season’s harvest. Grow Orange Summer for its bold color and comforting flavor—ideal for roasting and for turning into silky purées, hearty soups, and spiced sauces.

Sowing Tips

Transplant Conditions

Wait until soil reaches 65°F and nights stay above 55°F before moving outdoors. Harden off for 10 days first.

Direct Sow Preferred

Sensitive roots — does not transplant well. If starting indoors, use biodegradable pots and disturb roots as little as possible when moving outdoors.

Expert Note

For best sweet, storages-worthy fruit, transplant/plant only after nights are reliably warm and keep vines mulched to conserve moisture.