Bachelor Button (Centaurea Cyanus) Tall Mix Seed attract butterflies and are superb cut flowers regardless of whether they are fresh or dried. These plants need little care and as a bonus they are deer resistant. They bloom in late spring or early summer, and produce a large amount of flowers that are around two inches in diameter and double-fringed, with a thistle-like appearance. In areas with milder summers, they will continue to thrive and bloom until early September, provided that you are removing the old flowers. For optimal results, the best time to sow the seeds depends on where you're located. If you're from an area with milder winters, sow them in the fall, but anywhere else, sow in early spring. They should be sown in even rows, ideally with around six seeds per foot, as soon as the soil can be easily worked on, for optimal results. Ensure they are 6-12 inches apart. For the best results it is easier to start indoors in 2 inch pots, at least 4-6 weeks prior to planting them outside in the garden or on land. They should be kept at 65 degrees Fahrenheit and germinations is between 1-2 weeks. It is best to plant them in full sun, or partial sun in warmer climates. They tend to tolerate a wide range of soils provided it has good drainage, therefore ensure it is moist frequently for optimal results.