PRUNING REQUIREMENTS 



297 



Sambucus canadensis 



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 

 Lonicera tatarica 



Tartarian Honeysuckle 



Magnolia 



Magnolia 

 Mahonia 



Oregon Grape 

 Prunus cerasus 



Flowering Cherry 

 Pyracantha 



Evergreen Thorn 

 Rhododendron 



Rhododendron 

 Staphylea 



Bladder-nut 

 Xanthoceras 

 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 



