 'Cupcake' is a compact, bushy shrub, 1 to 2 ft (30—60 cm) in height with a 1 to 2 ft (30—60 cm) spread.Blooms are 2—3 in (5—7 cm) in diameter, high-centered with a double (17-25 petals) bloom form.The flowers are a clear, pretty pink, darker pink in cool weather and paler pink in warmer weather.