Aim to sow
0.25 inches (0.64 cm) deep and try to ensure a gap of at least
3.96 feet (1.22 metres).
By our calculations, you should look at sowing Veteran's Memorial about 35 days before your last frost date.
As Veteran's Memorial is hardy, ensure temperatures are mild enough to plant out - wait until after your last frost date to be on the safe side.