Ensure a seed sowing distance of
8.58 inches (22.0 cm). Soil temperature should be kept higher than
21°C / 70°F to ensure good germination.
By our calculations, you should look at sowing Pompon Splendid about 42 days before your last frost date.
Ensure that temperatures are mild and all chance of frost has passed before planting out, as Pompon Splendid is a tender plant.