1) Exceeding annual expectations 
Reblooming hydrangeas bloom in late spring or early summer like other Hydrangea macrophylla and then bloom again, producing a second set of flowers later in the season. Early season flowers are produced from buds that formed the year before. Flowers that come later in the summer are formed on the current season's growth. Most Hydrangea macrophylla...
Reblooming plants bloom during their expected bloom cycle and then again produce a second set of flowers later in the season. Remontant is another name for reblooming.