To what extent should a portion of the branches of an informal, multi-trunk shrub be pruned?

To what extent should a portion of the branches of an informal, multi-trunk shrub be pruned?

• A. One half
• B. Two thirds
• C. One third
• D. All of it

Answer: (C)

Thinning about one-third of the branches is the best approach for an informal, multi-trunk shrub. This moderate reduction opens the center, improves light and air movement, and encourages new growth from the remaining canes without over-stressing the plant. Removing too much at once can weaken vigor and may reduce flowering, while leaving the shrub crowded can lead to poor structure and increased pests or disease. If it gets overgrown, you can repeat the light thinning over several seasons, always starting with dead or damaged wood and prioritizing maintaining a natural, layered shape.

Thinning about one-third of the branches is the best approach for an informal, multi-trunk shrub. This moderate reduction opens the center, improves light and air movement, and encourages new growth from the remaining canes without over-stressing the plant. Removing too much at once can weaken vigor and may reduce flowering, while leaving the shrub crowded can lead to poor structure and increased pests or disease. If it gets overgrown, you can repeat the light thinning over several seasons, always starting with dead or damaged wood and prioritizing maintaining a natural, layered shape.