Information about the region Seine-Maritime:

www.seine-maritime-tourisme.com

website parcs et jardins de France:

www.jardinez.com

www.parcsetjardins.fr

websites about hydrangea:

www.lecomptoirdeshydrangea.com

www.pepiniere-kervilou-quimper.fr

www.pepinieredelathyle.com

www.hortensia-hydrangea.fr

www.hydrangea.com

www.hortensias.org 

www.hortensias.nl 

www.hydrangeasplus.com

www.americanhydrangeasociety.org