YouGarden Buddleia Tricolour Plant Pot Homebase Selecting Plants Buddleja Collection National Plant Network Buddleia Bicolor Flowering Shrub in 1 Gallon 1 X BUDDLEIA TRICOLOUR BUTTERFLY BUSH MIXED COLOURS HEALTHY GARDEN. Buddleja, the butterfly bush, is a lavishly flowering deciduous, in this case, patio tree. In August and September the plant produces flumes of deliciously fragrant flowers. As the name suggests, the fragrant flowers attract butterflies. Prune the plant hard in March; it flowers most profusely on new wood. This tree has three different coloured blooms, making it so much more stunning!