Complex sentence: Britain's first "Singing Sequoia" was commissioned in BlueBell Arboretum in spring, 2013; this automated musical and educational feature is amongst a group planting of Coastal Redwoods, which fully-grown in California are the tallest trees in the world.
Split into simpler sentences: Britain's first "Singing Sequoia" was commissioned in BlueBell Arboretum in spring, 2013. This automated musical and educational feature is amongst a group planting of Coastal Redwoods, which fully-grown in California are the tallest trees in the world.