Try to aim for a seed spacing of at least
11.7 inches (30.0 cm) and sow at a depth of around
0.39 inches (1.0 cm). Soil temperature should be kept higher than
20°C / 68°F to ensure good germination.
By our calculations, you should look at sowing Hollyhill Electra about 60 days before your last frost date.
Ensure that temperatures are mild and all chance of frost has passed before planting out, as Hollyhill Electra is a tender plant.