How to Grow a Pomegranate Plant Let seeds dry out for a few days, then place them in potting soil and keep warm and moist. Place pot in a sunny window. The seeds will germinate in about 2 months. Don't let the soil dry out while you're waiting. To keep the soil moist longer, slip the pot into a plastic bag and tie it closed. NEVER mist the plant. This will grow into an attractive, compact shrub which may eventually produce edible fruit.