Not recommended for indoor sowing. Important to keep soil moist to prevent crusting over, which causes poor emergence. Temperature and moisture stress can cause zoning (internal rings) and premature bolting.
Try to aim for a seed spacing of at least 2.97 inches (7.62 cm) and sow at a depth of around 0.5 inches (1.27 cm). Soil temperature should be kept higher than 13°C / 55°F to ensure good germination.By our calculations, you should look at sowing Flat of Egypt about 28 days before your last frost date.
Flattened three inch crimson purple roots and short leafy tops – Baker Creek Heirloom Seeds