Hydrangea Hortbux Blue & Pink This compact Hydrangea makes a fabulous floral hedge, offering a showy and disease-free alternative to low-growing box hedging. It is naturally compact, remaining less than 50cm (20) with maturity. If you need a lower hedge then it will respond well to pruning without compromising on flowers! This hardy deciduous shrub is a versatile choice for hedging or planted in patio pots as individual specimens. With such a compact habit, it will fit into the smallest of gardens! Height and spread: 50cm (20).