Do Cosmos Flower Each Year. For cosmos to reseed itself you have to leave the faded flowers in place long enough for seeds to form. So if you plan to sew some Cosmos seeds you have to be patient.
Oct 17 2009 Annual varieties of the cosmos flower grow best when fresh seeds are planted every year. Dec 13 2019 Seeds can be started indoors to get a jump-start on the season or sown directly into garden beds once the weather warms. Most cosmos varieties are annuals which means they wont return year after year.
In addition cosmos will not tolerate long periods of cold and wet weather as they actually prefer it dry.
Blooming throughout the summer months they attract birds bees and butterflies to your garden. Jan 15 2020 Seeds need about 7 weeks to turn into beautiful blooming flowers. The flowers blossom heavily during the season but they die when the first frost strikes. Both are native to Mexico and South America and both are tender annuals so will only withstand the.