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Pruning Requirements (American Elder Spiraea arguta)

American Elder Spiraea arguta Hybrid Snow Garland Spiraea billardi Billard's Spirea Spiraea prunifolia Bridal Wreath Spiraea tomentosa Hardhack Spiraea vanhouttei Van Houtte's Bridal Wreath Stephanandra flexuosa Stephanandra Syringa (in variety) Lilac Viburnum (in variety) Viburnum b. Late summer and fall-flowering:

Amorpha fruticosa False Indigo Buddleia davidi (Cut back in spring to prevent danger of rotting) Sweet-scented Buddleia Ceanothus americanus New Jersey Tea Clethra alnifolia Sweet Pepper Bush Hibiscus syriacus Rose of Sharon Hydrangea (in variety) Hydrangea Sorbaria arborea Chinese Mountain Ash Spirea Spiraea douglasi Douglas' Spirea Symphoricarpos racemosus Snowberry Vitex incisa Cut-leaved Hemp-tree B. SHRUBS NEEDING REMOVAL OF OLD WOOD ONLY: a.

Summer pruning:

Caragana Pea Shrub Daphne Deciduous Daphne Halesia Silver Bell Koelreuteria Varnish Tree Laburnum vulgare Golden Chain Magnolia Magnolia Mahonia Oregon Grape Prunus cerasus Flowering Cherry Pyracantha Evergreen Thorn Rhododendron Rhododendron Staphylea Bladder-nut Xanthoceras Lonicera tatarica Tartarian Honeysuckle Chinese Flowering Chestnut b. Winter pruning:

Aralia Angelica Tree Artemisia Wormwood Cladrastis Yellow-wood Pavia Dwarf Horse-chestnut Robinia Pseudacacia Black Locust Yucca Adam's Needle C. TREES WHICH REQUIRE LITTLE OR NO PRUNING:

Aesculus Horse-chestnut Catalpa Indian Bean Liriodendron Tulip Tree Paulownia Empress Tree Robinia Locust Sophora Pagoda Tree Sorbus Mountain Ash D. EVERGREENS THAT SHOULD BE PRUNED IN MAY OR JUNE:

Abies Fir Pinus Pine Picea Spruce E. EVERGREENS THAT MAY BE PRUNED AT ANY TIME:

Chamaecyparis Cypress Juniperus Juniper Taxus Yew Thuja Arborvitae