Acer platanoides ‘Crimson King’ – This RHS Award of Garden Merit winner has long been a standard shade tree with its distinct crimson-purple foliage (leaves about 7″ wide), with the leaf colour persisting through summer. It was originally a seedling of Acer platanoides ‘Schwedleri’ and forms a rounded tree with a very dense canopy. Grows 35′ high by 25′ wide. Hardy to zone 3.
Acer negundo ‘Kelly’s Gold’ – This Manitoba or Boxelder Acer features very un-maple-like compound foliage of golden-yellow (in spring), maturing to chartreuse by summer. The new stems are an attractive green covered with a greyish-white bloom. Tolerates part to full sun and produces yellow foliage tones in autumn. Grows 18-30′ high by 15-20′ wide. Hardy to zone 4.
Acer circinatum PACIFIC PURPLE (syn. ‘JFS-Purple’) – A newer cultivar of Vine Maple with bronzed new growth that shifts to a deep purple in the summer heat. It is usually grown as a multi-stemmed form and features bronze-orange autumn tones when grown in part to full sun. The stems and petioles are also reddish-purple. Grows 12-15′ high by 8-12′ wide. Zone 6.
Acer platanoides ‘Princeton Gold’ (syn. ‘Prigo’) – This golden-leaved Norway Maple was introduced in 1987 after being discovered in a block of green seedlings. The new foliage emerges a bright golden-yellow and tones down by summer, with leaf scorch being common in younger specimens or during periods of extreme heat. Grows 45′ high by 40′ wide. Hardy to zone 3.
Acer palmatum ‘Atropurpureum’ – This cultivar of Japanese Maple has finely divided leaf lobes with delicate serrations. The leaves emerge a deep red colour in spring but eventually fade to a bronze-green by summer – shifting back to bright red in autumn. ‘Atropurpureum’ has an upright vase-shaped growth habit. Tolerates air pollution. Grows 20′ high by 15-18′ wide. Zone 5.