Try to aim for a seed spacing of at least
11.7 inches (30.0 cm) and sow at a depth of around
0.47 inches (1.2 cm). Soil temperature should be kept higher than
16°C / 61°F to ensure good germination.
By our calculations, you should look at sowing Richmond Green Apple about 14 days after your last frost date.
Ensure that temperatures are mild and all chance of frost has passed before planting out, as Richmond Green Apple is a tender plant.