Pruning ash leaf spirea, also known as false spirea, is best done in late winter, after the extreme cold has subsided. This timing ensures that the plant has a chance to recover from any potential damage caused by pruning before it starts actively growing in spring.
When pruning ash leaf spirea, it is important to remember that this shrub has the potential to spread, so regular pruning is necessary to keep it within the desired space. However, it is crucial not to over-prune, as this can weaken the plant and affect its overall health.
To effectively prune ash leaf spirea, follow these steps:
1. Start by assessing the overall shape and size of the shrub. Identify any branches that are crossing or rubbing against each other, as well as any dead or damaged branches. These should be the first to be removed.
2. Use clean, sharp pruning shears or loppers to make the cuts. This helps prevent the transmission of diseases or pests from one branch to another.
3. When removing branches, make the cuts just above a bud or lateral branch. This encourages new growth and helps maintain a neat appearance.
4. Aim to remove no more than 30% of the branches during a single pruning session. This ensures that the plant retains enough foliage to support its growth and overall health. If more extensive pruning is required, it is best to spread it out over multiple seasons.
5. As you prune, step back periodically to assess the overall shape and symmetry of the shrub. This allows you to make adjustments as needed and achieve a balanced appearance.
6. If you’re unsure about how much to prune, it’s always better to err on the side of caution and remove less rather than too much. You can always prune more in subsequent years if necessary.
7. Once you have finished pruning, it’s a good idea to clean up any debris and dispose of it properly. This helps prevent the spread of diseases and pests.
By following these steps, you can effectively prune your ash leaf spirea and keep it within the desired space. Regular pruning in late winter will help maintain the shrub’s health and aesthetic appeal.
