Philadelphus coronarius Dwarf, narrow and columnar mock orange for tighter spaces. Erect, compact branches with dark green foliage are interspersed with hundreds of fragrant, single white blooms in late spring/early summer. Prefers a moist, well-drained soil. Drought tolerant once established. Height:  100cm (36 IN.) Spread:  125cm (48 IN.) Zone 4