Hydrangea plant ‘TMHY18-1’

#Latin name of the genus and species: Hydrangea macrophylla x angustipetala.

#Variety denomination: ‘TMHY18-1’.

#The new cultivar is a product of a planned breeding program conducted by the inventor, at a research nursery in Suffolk, UK. The objective of the breeding program was to produce new, more floriferous Hydrangea varieties with large flowers and upright habits. The crossing resulting in the new variety was made during the Summer of 2014.

#The accompanying photograph in FIG. 1 illustrates in full color a typical flowering plant of ‘TMHY18- 1’ grown outdoors in Suffolk, UK. Age of the plant photographed is approximately 1 year.

#FIG. 2 illustrates a close up of the inflorescence.

#The photographs were taken using conventional techniques and although colors may appear different from actual colors due to light reflectance it is as accurate as possible by conventional photographic techniques.

#In the following description, color references are made to The Royal Horticultural Society Colour Chart 2007, except where general terms of ordinary dictionary significance are used. The following observations and measurements describe ‘TMHY18-1’ plants grown outdoors in Camarillo, Calif. The plants were about 2 to 3 years old. Temperatures ranged from 10° C. to 20° C. at night to 15° C. to 27° C. during the day. No artificial light, photoperiodic treatments were given to the plants. Measurements and numerical values represent averages of typical plant types. Botanical classification: Hydrangea macrophylla x angustipetala ‘TMHY18-1’.

#Typical method: Softwood cuttings. Time to initiate roots: Approximately 16 to 28 days at approximately 22 to 27° C. Time to produce rooted cutting: 30 days during the Summer. Roots: Medium to thick, moderately free branching, fibrous and fleshy, moderately dense. White in color, not accurately measured with R.H.S. chart.