Sow in average, well-draned soil in full sun in spring after danger of frost. Sow 4-6 seeds about 3" apart in hills 36" apart. Cover with 1" of fine soil; firm lightly and keep evenly moist. Seedlings emerge in 7-14 days. Thin seedlings to 2-3 per hill when they are 2-3" high.
Aim to sow 0.47 inches (1.2 cm) deep and try to ensure a gap of at least 11.7 inches (30.0 cm). Soil temperature should be kept higher than 16°C / 61°F to ensure good germination.By our calculations, you should look at sowing Burpee Hybrid II about 14 days after your last frost date.