Pruning Tips



There are some important principles of pruning that you need to keep in mind to be successful.

Why prune? . To maintain the health of a plant, (removing dead, diseased or damaged wood). Another reason may be to encourage vigorous and bushy growth. Finally, regular pruning, when done correctly, will improve the supply of strong, young growth, which in turn will produce a greater amount of flowers or fruit.

When do you prune? Avoid too little or too much pruning. The routine removal of weak, diseased or dead limbs can be accomplished at any time during the year without negative effect on the tree or shrub. However, growth is maximized and wound closure is faster if pruning takes place before the spring growth flush.

Make the proper pruning cut. The cuts should be made just outside the branch collar. The branch collar contains trunk or parent branch tissue and should not be damaged or removed. Damage or removal of the branch collar creates an entry for unwanted diseases and pests and requires preventative measures.

Principles of pruning. There are two: formative and gradual renovation. Formative pruning aims to produce a balanced framework of strong, evenly spaced stems that permits maximum light and air to reach the entire plant.Gradual renovation is for rejuvenating an old, overgrown plant. You should remove deadwood and one third of the oldest stems or branches and cut back the remaining branches by one third. Do this for three years to get an overgrown plant back to its prime.

A light pruning after planting will ensure balanced growth, best done during a dormant stage. If a young shrub does not have a balance framework, cut back hard. Then select the strongest, most evenly spaced branches to form the new framework.

Timing is important for pruning. Pruning at the wrong time can take away next years flowers and weakens the plant. See the list below for specific plant recommendations.

For more information, please contact Our Growers by phone at 294.6000 or by email at growers@blochsfarm.com

Variety Bloom Season When to Prune 
Buddleia (butterfly bush) Summer Early spring, cut back in early spring for better flowering 
Campsis (trumpet vine) Late Summer Spring, head back to 3 or 4 buds 
Caryopteris (bluebeard)
Summer to Fall
Early spring, cut back in early spring for better flowering 

Forsythia (forsythia)
Early Spring 
After flowering, pinch back, blooms on old wood 

Evergreens Summer to Fall Mid-Spring 
Hibiscus (rose of Sharon)
Summer to Fall 
Early spring, head back to 2 or 3 buds in spring for larger flowers 

Hydrangea macrophylla (big leaf hydrangea) Summer 
After flowering, flower buds are over-wintered on previous years growth, prune right after done blooming 

Hydrangea (hydrangea) Summer Early spring, head back in midsummer for second flowering 

Lonicera japonica (honeysuckle vine) Summer Early spring, head back 3 or 4 buds 
Magnolia (magnolia) Early Spring After flowering, flower buds are over-wintered on previous years growth, prune right after done blooming 
Philadelphus 

(mock orange) Early Summer After flowering 

Potentilla Summer to Frost Late Winter 
Rhododendron (rhododendron)andAzaleas Spring 
After flowering, flower buds are over-wintered on previous years growth, prune right after done blooming 

Syringa (lilac) Spring After flowering, flower buds are over-wintered on previous years growth, prune right after done blooming 
Spiraea (spirea) Spring to Summer After flowering, pruning current years growth will promote second flowering 
Tamarix ramosissima (tamarix) Mid to late Summer Habit and flowering display are improved if it is cut back to the ground each winter 
Weigela (weigela) Spring 
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