Success with Hydrangeas, A Gardener’s Guide
by Lorraine Ballato

Hydrangeas and Viburnums
by Douglas Bartrum

Today’s Hydrangeas, A Buying Guide & More
by Tim Boebel

Hydrangeas in the North, Getting Blooms in the Colder Climates
by Tim Boebel

by Daria Price Bowman

by Glyn Church

Hydrangeas for the American Garden
by Michael Dirr

The Hydrangea Book, The Authoritative Guide
by Michael Dirr

Hydrangeas, A Gardeners Guide
by Toni Lawson-Hall & Brian Rothera

Our Favorite Hydrangeas, The Cape Cod Hydrangea Society
by Joan Harrison

Hydrangeas, Cape Cod and the Islands
by Joan Harrison

Heavenly Hydrangeas
by Joan Harrison

The Colorful World of Hydrangeas
by Joan Harrison

Marvelous Mopheads
by Joan Harrison

The Hydrangeas
by Michael Hayworth-Booth

Hydrangeas, Species & Cultivars 
by Corinne Mallet, Robert Mallet & Harry van Trier

Hydrangeas, Species & Cultivars, Volume 2
by Corinne Mallet

Hydrangeas, How to Grow, Cultivate & Enjoy
by Betty Momtgomery

Hydrangeas, beautiful varieties for home and garden
by Naomi Slade

ENCYLOPEDIA of Hydrangeas
by C.J. Van Gelderen & D.M. Gelderen