Philadelphus 39yellow hill39 is a superb deciduous hardy shrub that bears wonderful double and semi double white flowers in early summer the young foliage of this mock orange is a vivid yellow colour gradually maturing to a more green45yellow shade a sweet orange blossom fragrance emanates from this variety which is sure to delight visitors to your garden philadelphus 39yellow hill39 is well suited to your bed or shrub border where it should be situated next to plants with a