Mexican petunias Seed- Ruellia brittoniana 'Blue Star' 30 Seeds! Mexican petunias Seed- Ruellia brittoniana 'Blue Star' 30 Seeds! Mexican Petunia Blue (Ruellia Brittoniana Souther Star Blue) - The first dwarf Mexican Petunia from seed, the Southern Star series produces clean green foliage without any spots. Seed-grown Mexican Petunia makes this popular heat-loving nursery item more readily available and affordable to produce. Very adaptable and low-maintenance Southern Star Ruellia tolerates both wet and dry conditions. A great product to expand Southern perennial programs; can be used as an in-ground or container annual in other regions, but is not recommended for the far North. Flower Specifications Season: Perennial USDA Zones: 8 - 10 Height: 10 - 12 inches Bloom Season: Late spring to late summer Bloom Color: Blue Environment: Full sun Soil Type: pH 5.8 - 6.2, well drained soil Planting Directions Temperature: 72 - 76F Average Germ Time: 7 - 10 days Light Required: No Depth: Cover seed lightly Sowing Rate: 1 - 2 seeds per plant Moisture: Keep seeds moist until germination Plant Spacing: 12 inches