Trimming rhododendron advice

Asked June 1, 2020, 3:48 AM EDT

I need guidance on trimming back this 40-50 year old rhododendron. How much can I cut it back? I’ve let it get too tall and near the eaves.

Howard County Maryland

1 Response

Now is the time to prune (soon after bloom.)

The rule of thumb for shrubs is not to cut back more than 1/3 a year (unless you're doing a drastic renovation pruning down almost to the ground.--which we would not recommend for this healthy shrub.)

You can shape up a shrub or prune off a few stray tips any time. Here's a nice pruning refresher: