Lathryus odoratus A native to Italy, the sweet pea became the quintessential royal English garden flower early in the 1700s. By the 1800s, sweet pea breeding was a gardening "thing." More than 130 varieties greeted the 20th century, including the famous "Old Spice" varieties. Transplant or thin to 4-6" spacing, expect vines to reach 6'. Seeds Per Packet: 50 Seeds Per Gram: 12 Seeds Per Ounce: 300