How to Fertilize Philadelphus × polyanthus?
Balanced shrub feed once in spring

Philadelphus × polyanthus · Philadelphus × polyanthus
Grow in moist, well drained soil in sun to partial shade. Plant bare root plants in winter when the ground is not frozen or waterlogged. Incorporate lots of well-rotted manure or garden compost to improve the soil and water in well. Mulch in spring
Balanced shrub feed once in spring