Why not grow both moss curled decorative kinds as well as the plain leaved flavorful Italian kinds? Here is the ultimate parsley mix in one packet.
A packet of sows a 10 ft row (200 seeds)
Sow the seed in a pot or flat indoors and maintain a warm soil temperature (80° F) and moist soil conditions until germination but use care in transplanting to the garden. Some people plant the seed directly in the garden a few seeds per inch early in the season covering with 1/4 inch of soil. The seeds may take several weeks to germinate in the garden but the plants are hardy, robust and a bit of crowding seems fine in this crop. While germinating don’t let the seed dry out. Parsley will winter over and bolt into seed early summer the following year.