Try to ensure a gap of at least
1.95 feet (60.0 cm) when sowing to prevent overcrowding your seedlings. Soil temperature should be kept higher than
18°C / 64°F to ensure good germination.
By our calculations, you should look at sowing Emerald about 48 days before your last frost date.
Ensure that temperatures are mild and all chance of frost has passed before planting out, as Emerald is a half hardy plant.