One of the handful of Hydrangea macrophyllas identified as a re-bloomer by the research work done by Dr. Dirr and others of his team at UGA. DNA tests showed it was a near match with "Endless Summer". It has performed similarly for us. That means either pink or blue mophead blooms on new growth as well as old terminals if grown well and deadheaded of the first round of blooms. This assumes you have a long enough growing season to get the 2nd flush. Not patented or trademarked so not as expensive as some other re-bloomers. Zones 5-9. For more information on the DNA tests performed by Dr. Lindstrom, Matthew Pelto & Dr. Dirr, see Molecular assessment of remontant (Reblooming) Hydrangea macrophylla cultivars in Journal of Environmental Horticulture, 2003, 21:57-60.

A pastel mophead identified through the extensive research of the team assembled by Dr. Michael Dirr at the University of Georgia as one of a handful of re-blooming mophead hydrangeas, Hydrangea macrophylla ’Oak Hill’ is very much in the mode of "Endless Summer" or "Penny Mac" but has received little publicity and no marketing campaign so it remains a rare find for the gardening public. Flowers on both old & new growth of the season. Like the true "re-bloomers" it will do so ONLY if you remove the spent blooms (deadhead) the first flush. Quite an easy grow and a fine plant that’s been shoved aside by the marketing mavens & plant megaliths -- a bargain for gardeners who wish to avoid the patented and heavily marketed clones that so often don’t perform up to their glossy hype. Height to 5 feet; deciduous. Zones 5 - 9.

Discovered by Shawn Walls as a seedling in our hydrangea display bed in 1997 coming up between H. s. ’Rosalba’ and H.s. ’Blue Billow’. We assumed they were the parents. We didn’t really pay much attention to it but, wisely Shawn shared it with Flo at Specialty Ornamentals. She has grown it since and sold it wholesale to a widening, appreciative audience. Meanwhile, ours died from neglect. Time passed. Flo raved about it and brought us a replacement plant a few years ago. She’s right: it’s a keeper. Great, clean foliage of a lighter green than ’Blue Billow’ but with that same felty look. Lacecap flowers of a nice, rosy hue. She claims it is a re-bloomer which would be unique since lacecaps usually don’t do that. ’Twist & Shout’ being an exception. Zones 5-8.

From the garden of Penny McHenry, founder of the American Hydrangea Society, Hydrangea macrophylla ’Penny Mac’ covers itself with mid-blue mophead flowers (on acid soil) that age to tones of aquamarine. Produces bloom on current season’s growth as well as old wood so is one of the best for reblooming, & comes cheaper than the trademarked & much hyped ES. Deciduous for part shade, in zones 6-9, maturing at 6 feet.