Mophead - The nickname used to describe the familiar 'snowball' bloom on these hydrangeas. The florets seen are all sterile forming large colorful globular heads.
Lacecap - These flowers are made up of small fertile flowers in the center with a ring of larger sterile florets around the outside. The flower head has a comparatively flat, roughly disc-shaped appearance.
Zone hardiness is USDA zone 6 to 9 unless otherwise noted. Bloom times vary just slightly but most bloom late spring through fall.