F1 Hybrid Pollenless Sunflower Sunbright has is very popular. Being pollenless Sunbright is an excellent and very uniform cut flower and is vigorous in growth even under low temperature and short day conditions. A dense planting produces very high quality cut flowers in a short period of time. Sunbriht is an economical and profitable variety. Exercise extra care not to overfeed plants. Excessive application of Nitrogen fertilizer may result in overgrowth of plants, especially when grown as a summer crop.