After their cold vacation, your seeds are ready for soil. Use a small pot with drainage holes—think a yogurt cup with a hole poked in the bottom. Fill it with a light, sandy potting mix; pines like it lean and gritty, not rich and soggy.
Plant each seed about a quarter-inch deep, then water gently. Place the pot somewhere bright but not in direct, scorching sun. Think of it as a tiny green diva that needs soft light and a steady hand.