Cover with a very fine sprinkling of compost or vermiculite. To not exclude light. Keep moist but not waterlogged.
For optimal germination, soil temperature should be a minimum of 20°C / 68°F.Acclimatise to outdoor conditions over weeks. Transplant when all risk of frost has passed.
Pop art golden and red is half hardy, so ensure you wait until all danger of frost has passed in your area before considering planting outside.