Baby Blue Hubbard

Winter Squash

Zone 4b Save Garden

Botanical illustration of Baby Blue Hubbard

🌱 95d to harvest Vine

Sweetly aromatic and richly colored, Baby Blue Hubbard brings a cool, misty beauty to the winter garden—its skin a powdery blue-g…

Crop Dates

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

Crop Details

Trait	Value
Days to Maturity	95
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

Recommended Companions

Early Sunglow Corn

Whirlybird Mix Nasturtium

Frequently Asked Questions

What pest or disease commonly hits Cucurbita maxima (Baby Blue Hubbard) and how can I control it?

Cucurbita maxima is commonly plagued by powdery mildew, which appears as a gray-white coating on leaves in midsummer and can reduce yield by late season. Improve airflow by spacing plants well and water the soil (not the leaves), then start a preventative spray program as soon as leaf spotting appears using a labeled fungicide for cucurbits. If you find vines heavily infected, remove the worst leaves and avoid working between plants when foliage is wet to limit spread.

How often should I water Baby Blue Hubbard during the main growing phase?

During active vine growth and fruit set, keep the soil consistently moist but not soggy: water about 1–2 times per week depending on heat, aiming for deep moisture to the root zone. Check by feel—if the top 1–2 inches of soil are dry, water; if it stays wet or you see pooling, cut back. Reduce watering once fruits are fully sized and the vines start to slow so the squash cures better.

How do I tell when Baby Blue Hubbard is ready to harvest?

Harvest when the fruits reach about 95 days from sowing and the rind turns hard and deeply blue-gray with tough skin that resists scratching. The stems should be thick and starting to dry, and the fruit should sound dense when tapped lightly. Cut from the vine with 3–4 inches of stem attached and cure in a warm, dry place for 7–10 days before storing.

Sweetly aromatic and richly colored, Baby Blue Hubbard brings a cool, misty beauty to the winter garden—its skin a powdery blue-gray that deepens with age. Expect dense, fine-grained flesh that turns velvety when roasted, with a naturally sweet, nutty flavor and a spoonable texture that shines in hearty winter preparations. Grow it for dependable storage and for showstopping color that makes every harvest feel like a keepsake.

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

Sow/transplant only when nights are reliably warm, then give plants plenty of space for their vine growth even if the fruit is smaller.