Green

Flowers of Persian silk tree, Albizia julibrissin. Photo: Getty Images.

Albizia julibrissin

Heracleum sphondylium flowers. Getty Images

Heracleum sphondylium

Sweet briar flower. Getty Images

Rosa rubiginosa

Limelight hydrangea. Getty Images

Hydrangea paniculata ‘Limelight’

Philodendron scandens in a pot. Getty Images

Philodendron scandens

Amelanchier canadensis. Getty Images

Amelanchier canadensis

Osmanthus x burkwoodii in flower. Getty Images

Osmanthus x burkwoodii

Ash tree, Fraxinus excelsior. Getty Images

Fraxinus excelsior

Chinese magnolia (Magnolia Liliiflora Nigra) flowers. Getty Images

Magnolia liliiflora ‘Nigra’

Ficaria verna flowers. Getty Images

Ficaria verna subsp. verna

Sweet chestnut (Castanea sativa) tree

Castanea sativa

Liquidamber leaves and seed balls. Getty Images

Liquidambar styraciflua

Quercus robur. Getty Images

Quercus robur

White poplar tree. Getty Images

Populus alba

Weeping cherry (Pendula Rubra). Getty Images

Prunus pendula ‘Pendula Rubra’