Home Gardening some think the Katsura tree smells like caramel or cotton candy when it loses its leaves in the fall. Besides being wonderful to smell in the fall, the Katsura sports a lovely blend of orange-, raspberry- and apricot-coloured leaves. In the spring Katsura has reddish-purple new growth, in summer it sports heart-shaped blue-green leaves and in winter the gray, slightly exfoliating bark lends interest.