For standout garden displays and landscape designs that are sure to be a hit, you can’t go wrong with this amazing hydrangea. Annabelle bears eye-popping, 10" flower heads that begin life as snowy white and then transform to a unique green shade later in summer. Butterflies and other pollinators love the extra-large bloom heads that appear over a two-month period. This is a deciduous shrub that boasts a rounded form and is quite easy to grow.