Philadelphus Virginal, Commonly Called Mock Orange Blossom, Is A Hardy Flowering Shrub That Bears Sweetly Scented Flowers In Mid Summer. These Deciduous Shrubs Have Double Pure White Blooms & Their Orange Blossom Perfume Often Fills The Garden, Attracting Bees & Other Pollinating Insects. Philadelphus Are superb Shrubs For A Boundary Or In A Border. They Can Get Quite Large But Regular Pruning Keeps These Shrubs Neat & Manageable & Encourages More Flowers.grow Philadelphus In Fertile, Well Drained Soil In A Sunny Or Part Shaded Position. Philadelphus Are Excellent For Coastal Gardens & They Will Also Tolerate City Pollution. plantingdig A Hole Large & Deep Enough To Take The Plant’s Root Ball.gently Tap The Plant Out Of Its Pot Without Disturbing The Soil Around The Roots.position The Plant In The Hole So The Plant’s Crown Is Level With The Surface & Sits At The Same Depth As It Was In The Pot; Make Sure The Roots Are In Direct Contact With The Soil.backfill With The Excavated Soil & Firm In Gently.water To Settle The Soil Around The Roots. aftercare.watering: Water Regularly In The First Few Weeks After Planting But Don’t Overwater. The Plants Will Send Their Roots Down In Search Of Moisture As They Grow.feeding: Give Plants A Boost If Necessary With A Handful Of Granular Feed Hoed Into The Soil In Spring.pruning: Prune Philadelphus As Soon As The Shrub Has Finished Flowering. Cut Flowering Stems Back By Two Thirds To Ensure Next Year’s Flowers.on Well Established Or Congested Shrubs Cut Out A Third Of The Old Stems Every Year, Back To Within A Few Inches Of The Ground, To Encourage New Stems.