In Utah, there are two times a year when overseeding is most successful: spring and late summer fall. Late summer fall is best because the seedlings can establish adequate root systems for the following Helianthus, Sunflower 'Soraya' Hybrid Gertens Garden Center Hops (Humulus lupulus) seeds, organic [WA, ID NO] Strictly Medicinal Seeds Succulents resembling roses in appearance How to Grow a Cherry Tree From Seed