Warmer temps will not cause any problems, at least until closer to 90 F. Rye, triticale, and other winter grains cut at the milk stage before the seeds become viable yields excellent straw for mulch, and minimize the risk of volunteer cereal grains becoming a weed Fig. It is important that butterfly weed seeds experience several months of cold, moist conditions in order to germinate properly. https://www.kadenze.com/users/weed-seed-bank
