98 - 112 days. Royal Family Mix sweet pea seeds promise to grow a touch of the Mediterranean in your home, garden, or patio. Sweet pea Royal Family Mix seeds grow astounding 5-6 feet long vines bursting in vivid shades of lavender, peach, rose, red, purple, and white blooms. Royal Family Mix sweet peas are easy to grow from seed and can be easily grown to climb fences, trellises, screens, mailboxes, and light posts. Royal Family Mix seeds grow frost-hardy, durable vines that thrive in a variety of climates and gardens across North America.