Aim to sow
0.49 inches (1.25 cm) deep and try to ensure a gap of at least
3.12 inches (8.0 cm). For optimal germination, soil temperature should be a minimum of
8°C / 46°F.
By our calculations, you should look at sowing Espinaca about 60 days before your last frost date.
Espinaca is half hardy, so ensure you wait until all danger of frost has passed in your area before considering planting outside - as a guideline, the minimum temperature outside should be approximately 0°C / 32°F.