About This 200 Penstemon Seeds. Multicolor flowers can be grown outdoors, in the greenhouse, garden, under a sheltered canopy or in pots on the balcony. Sowing time: January to February. Flowers: June to September. Plant height: 75-100 cm. Brightly colored garden flower seeds. Grow a robust red penstemon flowers yourself. Germination temperature: 18-22°C. Germination time: 2-3 weeks. It's best to pre-germinate the seeds in germination bags or mini-greenhouses at room temperature. Please plant floral under suitable environment, temperature and humidity during planting. Store unused red penstemon seeds in a sealed container. After-sales service. If you have any questions about red penstemon seeds, please tell us by email. We will answer you within 24 hours. Overview Brand : Samen Schenker Color : Multicolor Sunlight Exposure : Partial Sun Unit Count : 200.0 Count Number of Pieces : 200 Number of Items : 200