Our goal in creating Incrediball ® hydrangea was to develop a non-flopping version of 'Annabelle.' What we ultimately selected, though, was even better: a powerhouse of a plant that not only has strong, sturdy, supportive stems, but also extra large flowers. On mature plants, they can become as large as basketballs! Blooms age to a beautiful jade green through summer and fall. Don't let its good looks fool you, though - this North American native is super hardy and tough as nails.