Watermelon Seeds – Square

Square Watermelon Seeds produce a fascinating heirloom variety traditionally shaped during growth using containers or molds. Known for their crisp texture, refreshing sweetness, and strong vine growth, these watermelons add a unique touch to home gardens. With high germination and vigorous performance, this variety thrives in warm-season conditions, making it ideal for gardeners seeking something visually striking and productive.

Features

• Unique Shape Potential: Fruits naturally grow round but can be shaped into a square form using a growth mold.

• Heirloom Quality: Open-pollinated seeds preserved for consistent growth and flavor.

• Non-GMO & Organic: Naturally grown, untreated seeds suitable for clean and sustainable gardening.

• High Germination Rate: Ensures reliable early sprouting and strong vine development.

• Warm-Season Performer: Thrives in sunny, well-drained garden locations.

Specifications

• Seed Type: Heirloom, Non-GMO, Organic

• Planting Season: Warm-season crop

  • Indoor Sowing (optional): Late March–April

  • Direct Sowing Outdoors: April–June after soil warms to at least 70°F (21°C)

• USDA Hardiness Zones: Best for Zones 4–11

  • Zones 4–6: Start indoors April; transplant outdoors May–June after frost

  • Zones 7–9: Direct sow or transplant April–May

  • Zones 10–11: Direct sow February–April

• Sunlight: Full sun (8+ hours daily)

• Soil Requirements: Loose, well-drained, nutrient-rich soil with pH 6.0–7.5

• Germination Time: 7–12 days

• Maturity: Approximately 80–95 days

• Growth Habit: Vigorous trailing vines

• Use: Suitable for shaping novelty watermelons and general summer harvests