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PtABI3 is the poplar homolog of the Arabidopsis ABSCISIC ACID-INSENSITIVE 3 gene. The cover shows a radial section through an apical bud of a PtABI3-overexpressing poplar. Growing apices of poplar develop into dormant buds upon perception of a short-day signal in late summer. Buds enable perennial plants to survive the winter season and to resume growth in spring. Buds contain arrested leaf primordia encased by bud scales. PtABI3-overexpressing poplars, however, develop inappropriate buds with large embryonic leaves and small stipules and miss bud scales. On pages 1885­1901, Rohde et al. show that poplar PtABI3 is required for the growth rate and differentiation of the organs inside the forming bud.