I wrote this article about pruning and dead heading hydrangeas a while back. The information still holds true. This is one of my most asked about subjects. Enjoy! John
A rare beautiful January day found us preparing some new flower beds for Ms. Marion, who most people around here refer to as “The hydrangea lady.” I knew she was working in the yard and I really wasn’t paying attention to what she was doing until I walked by a garden cart full of old, brown hydrangea blooms that had been freshly cut.
Since I get asked about cutting, deadheading, and shaping hydrangeas quite often, and since Marion is the most knowledgeable hydrangea grower I ever met, I went looking for her to see what was going on. I found her bent over a planting of hydrangeas, busily working her pruning shears.
I asked about her technique because what she was doing was different from what I would have done. She stood and smiled and said, “These are ‘Annabelle’ hydrangeas. Annabelles and a few others of their kind (h.arborescens) bloom on new growth and may be pruned at any time.” She was quick to add that hydrangeas do not have to be pruned and that she was just taking off the old blooms and cutting to get a little shape on the plants when they come back in the spring. Marion does not believe in much actual “pruning” of the hydrangeas, but she said that it was time go remove the old blooms which were becoming unsightly. She said that a few other hydrangeas, notably “limelight” and “pee gee” hydrangeas bloom on new growth and are not so particular.
I asked about cutting the dead blooms out of other types of hydrangeas and she walked over to a tall oak leaf variety. She pulled a stem down and said, “I would just cut the old flower head off right here.”
Marion explained that the blooms for oakleaf and mophead hydrangeas have already been set and that they are contained in the new buds coming from the sides of the stems. She showed me the new (blooming) growth on an oakleaf hydrangea and said, “we can cut down close to these developing buds and not lose the flowers in the spring.”
So then I asked, “what would happen if you cut the plant lower because it was too tall?”To which she replied, “Well, I wouldn’t do that because I will get more blooms by cutting up high. If you want to shape the plant, or if it is just too tall, you can cut the stem as low as you wish with the understanding that the only blooms left will come from the already developed new growth. For instance, you can cut way down here (see picture below) and the plant will still bloom from the buds below.
In a few short statements and by showing me a few examples, she had answered my question about cutting the old blooms from hydrangeas. The fact that she was doing the job on a day in January told me that this was the correct time to do so. Marion would not have been doing that particular job, otherwise. She is a most knowledgeable and accomplished teacher.
You may wish to see a previous article which explains the dynamics of plant pruning: Pruning as an art form-the basics of pruning
I also wrote about a tour of Marion’s beautiful hydrangeas last June. There are some good pictures and info there. See a tour of Marion’s hydrangeas
If you would like a consultation with John Schulz, Landscape Artist, in your yard, Please contact me by email
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