VegetablePumpkin
Montana Jack Pumpkin
Montana Jack is an early-maturing pumpkin bred by renowned plant breeder John Navizio specifically for short-season gardeners. Reaching 8-15 pounds with a uniform shape, it produces reliably in 90-99 days, making it often the first pumpkin out of the field in regions with limited growing windows. Hardy from zones 3-13, this rare variety thrives on a strong vining habit and delivers equally well whether you're carving jack-o'-lanterns or baking pies.
Photo © True Leaf Market
Growing Conditions
USDA Zone
3-13
Sunlight
Full Sun
Water
Moderate
Soil
Well-drained, Fertile Loam With Organic Matter
Growth Stats
24 in
Height
Spacing
36
Plant Profile
Sunlight
Full Sun
Water
Moderate
Zones
3-13
Size
24in H x ?in W
Growth
—
Care
High
Hover over chart points for details
Highlights
Montana Jack earns its reputation as a farmer's market favorite through sheer practicality and reliability. An 8-15 pound pumpkin with a uniform, attractive shape arrives early in the season when demand peaks. The fact that these typically emerge first from the field in any given region speaks to John Navizio's careful selection for early maturity, a trait he specifically prioritized when developing this cultivar.
Common Uses
Montana Jack serves both the carver and the baker with equal competence. Its uniform 8-15 pound size slots perfectly into the sweet spot for jack-o'-lanterns, producing enough flesh and seeds for cutting while remaining manageable to handle. For kitchen use, it cooks down beautifully for pies and purees, delivering reliable results in soups and traditional autumn dishes.
Growing Timeline
No timeline data available yet for this variety.
Care Instructions
Direct Sow
Sow seeds directly into warm soil after the last frost date has passed and soil temperature reaches at least 60°F, ideally warmer. Plant in groups of 3-4 seeds spaced 36 inches apart, thinning to the strongest seedling once true leaves appear.
Harvesting
Montana Jack reaches maturity in 90-99 days from planting. Harvest when the rind has fully hardened (a fingernail cannot easily pierce the skin), the stem turns brown and corky, and the fruit has developed full color. Cut pumpkins from the vine with 2-3 inches of stem attached rather than pulling, which can damage both fruit and plant.
Growing Calendar
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Companion Planting
Ecology & Traits
Edible
Scientific Classification
Cucurbita pepo
Family
Cucurbitaceae
Genus
Cucurbita
Native Status
L48 (NI)PR (I)CAN (W)
History & Origin
“Montana Jack owes its existence to John Navizio, a famed plant breeder who recognized a critical gap in the pumpkin world: gardeners in short-season climates needed a variety that would reliably mature before frost. Rather than accept that northern growers should settle for later varieties, Navizio selected and developed Montana Jack specifically for early maturity. His work resulted in a pumpkin that consistently outpaces competitors to harvest, often the first to reach full size in any given field.”