| In May I plant 2 Diabolo Ninebark shrubs next to my house. I am interested in maintaining a fuller effect from the shrubs rather than gaining height. When can I trim back this type of shrub generally, and more specifically since they were just recently plant when do you recommend trimming them back this year? |
| Summer blooming shrubs bloom on new wood so are best trimmed at the end of winter dormancy, just before new growth starts in the spring. Pruning now will eliminate bloom potential. Also, it's generally not advised to prune after transplanting. Transplanting itself is a shock, and pruning another one. Pruning eliminates the foliage that is needed for photosynthesis so the plant can grow a vigorous root system. Finally, don't prune in fall. Pruning stimulates tender new growth which is prone to frost damage. |
