Jarrahdale

Pumpkin

Zone 11b Save Garden

🌱 105d to harvest Vine

Sink your senses into Jarrahdale’s velvety, slate-blue skin—an elegant, dusted rind that feels almost powder-soft at first touch.…

Crop Dates

Milestone	Date
Start Indoors	Feb 12th
Last Frost	Jan 1st
Transplant / Sow Outdoors	Feb 26th
Harvest Begins	Jun 11th
Harvest Ends	Dec 31st

Crop Details

Trait	Value
Days to Maturity	105
Sun Requirements	Full Sun
Growth Habit	Vine
Support Needed	Trellis
Planting Depth	Normal
Germination Temp (°F)	80
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 most often affects Cucurbita maxima (Jarrahdale) and how can I control it in a home garden?

Cucurbitaceae squash commonly suffer from powdery mildew, which shows up as a white, dusty coating on leaves and can quickly reduce fruit size late in the season. Start control early by spacing plants for airflow and removing the most heavily infected leaves; avoid wetting foliage when irrigating. If it’s spreading, use a labeled fungicide for powdery mildew and repeat according to the label, focusing on leaf surfaces.

How often should I water Jarrahdale squash during the main growing phase, and what soil moisture level should I aim for?

During flowering and fruit set through mid-growth, keep the root zone evenly moist but not waterlogged—about 1 to 2 deep waterings per week depending on heat and soil, so the soil dries slightly on the surface between irrigations. Aim for moisture at roughly the top 5–10 cm (2–4 in) staying consistently damp; if you can push a finger in and it comes out dry several cm down, it’s time to water. Once fruits are well sized, reduce slightly to prevent overly wet conditions that encourage disease.

How do I tell when Jarrahdale (Cucurbita maxima) is ready to harvest?

Harvest when the rind is fully hardened—your thumbnail should not easily puncture it—and the fruit’s color has deepened and looks uniform for the variety. The stem should be dry and tough, and the vines may start to yellow as the squash reaches its ~105-day maturity window. Cut with a few inches of stem attached and cure the fruit in warm, dry conditions afterward for best keeping.

Sink your senses into Jarrahdale’s velvety, slate-blue skin—an elegant, dusted rind that feels almost powder-soft at first touch. Inside, the flesh turns a rich, warm butter-yellow with a fine, dense texture that roasts to a smooth, spoonable consistency and shines in hearty purées, soups, and pies. A dependable 105-day pumpkin for gardeners who love a dramatic harvest and versatile, comforting flavor from one standout variety.

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

Start seeds only if you can transplant with minimal root disturbance; otherwise direct-sow after soil warms, because Jarrahdale is a frost-sensitive cucurbit.