Treasuresbylee - Blue Diamond Phlox - 30 Heirloom Flower Seeds 30 Freshly Harvested Seeds Beautiful Packaging, Instructions on backside. The plant needs sunny to very minimal shade with rich well-drained soil. Also give attention to plant-placement. Great for gardens, borders, cut flowers Because phlox need moisture, water them regularly at ground level if at all possible. Once new-season growth reaches a six-inch height, eliminate 5-6 stems per plant and pinch back growing tips.