We typically expect the first blooms during the second week of August with a full bloom lasting 4-6 week starting mid August.  However, the sunflower can bloom 2 weeks earlier or 2 weeks later than expected.. Typically we receive a hard frost early September which marks the end of the blooming period, but we have had blooms into the 4th week of September some years.  It’s best to check our facebook page for current updates.