Hello, I'm on a hunt for hydrangea Incrediball x 2, however what I find confusing is the eventual height given on different websites. Some list it as up to 2m tall, some 1.5m, some 1.2m. Are they all different varieties or which website should I trust? I would like to put them under my windows and they can't be taller than 1.2-1.5m, so it really makes a difference to me. Hydrangea Anabelle is the same, all different hights listed. Thank you!