Seeds - Chocolate Drop Penstemon. Minimum of 20 seeds. This flower produces 2ft spikes of deep purple, almost black flowers. Wonderful perennial in zones 3-9. Great pollinator plant for bees, butterflies & more. Seeds are extremely small. Please make sure to research your seeds online before starting them, so that you can ensure proper germination. We are not responsible for any issues due to germination. Seeds - Chocolate Drop Penstemon