Variety field guide
What to expect from Blue Hubbard Winter squash Seeds
Blue Hubbard Winter squash seeds produce blue winter squash, often 10-20 lb, on vining/climbing plants.
Read the complete product descriptionTraits, flavor, garden use, variety notes, and the full catalog record
Blue Hubbard Winter squash seeds produce blue winter squash, often 10-20 lb, on vining/climbing plants. It is best suited to large gardens, winter storage, bulk cooking, roasting, soups, and growers who want a dramatic storage squash. rich, sweet, dry flesh that works well for roasting and puree Grow massive blue-gray storage squash with dense golden flesh for winter meals, roasting, and large-batch cooking.
About Blue Hubbard
Blue Hubbard is an annual winter squash with blue color, 97–120 in mature height or spread, and a vining/climbing habit. Harvest form or size: often 10-20 lb. Botanically it is Cucurbita maxima Duchesne. Maturity or first bloom: 100-109 Days; germination: 7-10 Days at 75–90 °F. Best for large gardens, winter storage, bulk cooking, roasting, soups, and growers who want a dramatic storage squash. Rich, sweet, dry flesh that works well for roasting and puree.
History and provenance
Blue Hubbard belongs to a long-circulated American Hubbard squash tradition. The named type became valued in northern gardens for thick rinds, large fruit, dense flesh, and the ability to store well when fully mature and sound. Botanical record: Cucurbita maxima var. maxima. The broader crop history is kept separate from the documented history of the named variety. Where an exact breeder, introduction date, family story, or cultural attribution cannot be supported by a credible record, repeated claims are not presented as certain. Blue Hubbard squash seeds produce large blue-gray, hard-rinded squash with dense golden-orange flesh. The defining kitchen quality is rich, sweet, dry flesh that works well for roasting and puree. Blue Hubbard squash seeds are warm-season seed. Give runners a planned direction so leaves receive air and fruit can rest on a dry surface.
Growing facts
| Scientific name | Cucurbita maxima Duchesne |
|---|---|
| Life cycle | Annual |
| Maturity / first bloom | 100-109 Days |
| Germination | 7-10 Days at 75–90 °F |
| Seed depth | 1 in |
| Plant height / spread | 97–120 in |
| Growth habit | Vining/Climbing |
| Spacing | 36 in between plants; 72 in between rows |
| Sunlight | Full sun |
| Soil | Loamy; pH 6.0–6.5 |
| Water | Moderate |
| Support | No-Support |
Starting Blue Hubbard from seed
How to grow Blue Hubbard Winter squash
Botanical identity: Cucurbita maxima Duchesne. Life cycle: Annual.
Sow 1 in and use a seed-zone temperature near 75–90 °F. Expected emergence: 7-10 Days. No stratification; direct sow into warm soil or start briefly in biodegradable cells and transplant young
Plant during Late Spring. Space plants 36 in apart with 72 in between rows or planting bands.
Provide Full sun, moderate water, and loamy near pH 6.0–6.5. Support: No-Support.
Garden performance and care
Give Blue Hubbard enough room for its vining/climbing growth. Direct irrigation to the soil, keep developing fruit on dry mulch or boards where rot is common, and leave seed-saving fruit on the plant beyond the eating stage. Expected emergence is 7-10 Days; the listed maturity or bloom timing is 100-109 Days.
Harvest, bloom, and uses
Blue Hubbard is best for large gardens, winter storage, bulk cooking, roasting, soups, and growers who want a dramatic storage squash. Harvest form or size: often 10-20 lb. Color at the principal harvest or mature stage: Blue. Rich, sweet, dry flesh that works well for roasting and puree.
Saving seed
Seed saving for Blue Hubbard Select several healthy, true-to-type plants so the saved lot represents the variety rather than one unusually early or large individual. Squash and gourds are insect-pollinated and cross readily with other varieties of the same species. Confirm the species identified for this crop, then isolate by distance or controlled hand pollination. Mark seed fruit and let it reach full biological maturity; summer squash must become large and hard, winter squash must develop full rind color, and luffa or hard-shell gourds must mature well beyond the edible stage. Cure sound fruit before extraction when the crop benefits from curing. Remove, wash, and dry seed to a hard, storage-ready condition. Maintain several representative plants and record species, population, isolation, fruit selection, curing, cleaning, and test date.
Common problems
Watch Blue Hubbard for cucumber beetles, squash bugs where applicable, aphids, powdery or downy mildew, bacterial wilt, crown rot, poor pollination, and fruit damage on wet soil. Rotate cucurbit crops, provide airflow, water at the root zone, protect young plants before flowering, and remove covers when blossoms need pollinators. Do not work wet vines.
Frequently asked questions
When is Blue Hubbard ready?
100-109 Days from warm direct sowing or equivalent established transplant
How long does germination take?
Expect 7-10 Days near 75–90 °F; actual emergence changes with moisture, seed condition, and soil temperature.
How large does it grow?
About 97–120 in with a vining/climbing habit. Support: No-Support.
Can it grow in a container?
Best in open ground or a large raised bed; mature vines require substantial horizontal or vertical space.
How is it used?
Primary uses: large gardens, winter storage, bulk cooking, roasting, soups, and growers who want a dramatic storage squash. Rich, sweet, dry flesh that works well for roasting and puree.
Can I save seed?
Yes where the crop biology allows, but keep compatible varieties isolated, use several healthy plants, wait for full seed maturity, dry thoroughly, and label the lot.
Minimum Seed Count:25 seeds
