Keep in mind when planting that Lemon Symphony is thought of as half hardy, so it will need protecting in periods of cold weather.
Aim to sow
0.04 inches (0.1 cm) deep and try to ensure a gap of at least
11.7 inches (30.0 cm). Soil temperature should be kept higher than
18°C / 64°F to ensure good germination.
By our calculations, you should look at sowing Lemon Symphony about 56 days before your last frost date.
Ensure that temperatures are mild and all chance of frost has passed before planting out, as Lemon Symphony is a half hardy plant.