Mock Orange

Philadelphus

A graceful, arching shrub grown here as a semi-formal hedge; blooms on old wood.

Sun
full sun to part sun
Water
moderate
Bloom
Fragrant white flowers in late spring (on old wood).

Care guide

Quick ID

Shrub used in hedge form. Arching stems with a naturally graceful habit. Moderately wind-tolerant. More realistic as a semi-formal hedge than a crisp geometric shape.

Draper Microclimate Notes

Tolerates full sun but may perform better with light afternoon relief under Draper's high-elevation sun intensity. In intense west-facing exposures, foliage can look coarse and stressed by late summer. Sandy loam with high percolation is favorable for root health. Wind can drive asymmetric growth; manage the windward side with targeted pruning.

Watering & Irrigation

Prefer deeper, spaced watering cycles over shallow frequent irrigation. Ensure the irrigation pattern wets beyond just the crown — broader root-zone saturation encourages deeper rooting. Maintain 2-3 inches of mulch to moderate root-zone temperature and retain moisture between cycles.

Pruning & Shaping

Blooms on old wood — prune immediately after flowering, not before.

Semi-formal hedge strategy (recommended):

Maintain a soft trapezoid profile: wider at the base than the top. Allow slight seasonal expansion during the bloom period for a natural look.

Post-bloom (late spring): Primary thinning and rejuvenation. Remove roughly 20-30% of the oldest stems at ground level. Lightly head back long flowering shoots to shape the hedge. Mid-summer: Very light corrective shaping only if needed. No heavy cuts. Winter: Selective rejuvenation only if the plant has become overgrown or congested. Avoid cutting deeply into old wood.

Transplanting & Establishment

Early-to-mid March. Lightly prune before moving. Deep soak after planting.

Seasonal Care

Early-mid March: Transplant if needed. Deep soak. Late spring (right after bloom): Primary thinning/rejuvenation + light heading-back of flowering shoots. Mid-summer: Optional minimal corrective shaping. Fall: Avoid heavy cuts. Year-round: Maintain 2-3 inches of mulch.