Answer: Your Mock Orange prefers full sunshine and should flower after the new leaves emerge. You didn't say whether or not your shrub is producing new leaves - they are slow growing and the leaves emerge in a rosette, quickly followed by fragrant flowers. If your Mock Orange is not producing new leaves, try pruning it back to encourage new growth. If it is producing new leaves each spring, it simply needs to mature a bit more. Hold off on fertilizer until it finally does flower; too much nitrogen fertilizer can result in lots of green growth at the expense of flowers.
Best wishes with your Mock Orange.
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