High Germination Rate: These double flowered moss rose portulaca seeds ensure 90%+ germination in USDA zones 4–11. Sow purslane seeds 1/8 inch deep, sprouts appear in 7–14 days under 65°F+. Easy to Grow: double flower rose moss germinate best in full sun. Keep soil moist but not soggy; their portulaca seeds bloom into vibrant, low-maintenance beauty. Compact Growth: Moss rose plant reaches about 8 inches tall, spreading 6 inches wide. Portulaca grandiflora seeds yield dense, succulent foliage and bright double blooms all summer. Long-Lasting Blooms: Heirloom rose moss seeds produce eye-catching, double flowered portulaca in vivid colors. Ideal flower seeds for planting in rock gardens, borders, and containers.