Wonderful herb often used in perfumes and for medicinal reasons. Very beautiful plant.
You can either start hyssop in seed trays or you can direct sow them into the soil.
If sowing in a seed tray simply start them indoors 8 to 12 weeks before setting them in the garden. Keep soil moist and at a temperature around 65 to 70 degrees until they emerge. They should emerge in 14 to 21 days. Make sure they can receive daily light once they have sprouted. Once danger of frost has past plant them in well drained soil about 12 inches apart.
If direct sowing only plant them after danger of frost has past. Plant seeds in well drained soil. Once they emerge thin down to one plant every 12 inches or so. Harvest leaves and enjoy.