Jarrahdale Pumpkin
Cucurbita maxima 'Jarrahdale'
A distinct winter squash variety featuring a heavily ribbed, flattened globe shape and a striking blue-gray to slate-green rind.
- Light
- Full sun, requiring 6 to 8 hours of direct sunlight daily
- Water
- Water deeply and consistently, providing about 1 to 2 inches of water per week. Keep the soil evenly moist but avoid waterlogging, and water at the base to keep foliage dry.
- Growth
- Vigorous herbaceous annual with a trailing, sprawling vine habit. Vines can extend up to 10 to 15 feet, producing large fruits typically weighing between 6 and 18 pounds.
Care instructions
Provide full sun exposure with at least 6 to 8 hours of direct light daily. Maintain consistently moist soil using deep watering at the base to prevent foliage moisture. Apply a balanced organic fertilizer every few weeks during the active growing season, and ensure good air circulation around the spreading vines.
Growing details
Sunlight
Full sun, requiring 6 to 8 hours of direct sunlight daily
Watering
Water deeply and consistently, providing about 1 to 2 inches of water per week. Keep the soil evenly moist but avoid waterlogging, and water at the base to keep foliage dry.
Soil
Rich, well-draining loamy soil amended with ample organic matter such as compost, with an ideal pH range between 6.0 and 6.8.
Hardiness zone
Typically grown as an annual across USDA zones 3 through 11, as it is sensitive to frost.
Growth habit
Vigorous herbaceous annual with a trailing, sprawling vine habit. Vines can extend up to 10 to 15 feet, producing large fruits typically weighing between 6 and 18 pounds.
Bloom season
Flowers appear during the mid-summer months, producing large, vibrant yellow to orange bell-shaped flowers.
Propagation
Propagated primarily from seeds sown directly into warm soil after the last frost date, or started indoors in biodegradable pots 3 to 4 weeks prior to transplanting.
Common pests & issues
Susceptible to powdery mildew, downy mildew, vine borers, and cucumber beetles. Prevent issues by ensuring proper spacing for air circulation, using row covers early in the season, and rotating crop locations annually.
Similar species
Similar to other blue-green winter squash varieties such as 'Queensland Blue' and 'Triamble', but distinguishable by its specific deeply ribbed, strongly flattened globe contour and slate-gray coloration.