About spring pruning, hydrangeas and taking a step back
Early spring, before woody plants leaf out, is a time for preparatory garden work.
Pruning woody shrubs, like hydrangeas, can seem daunting at first. Before beginning anything, take a step back and have a look. What is the shrub you’re looking to prune?
With your full shrub in sight, perhaps at a distance, take a moment to observe it. Is it old or young? Has it been pruned recently, or is it a tangled mass of years of undisturbed growth?
There is no need to rush in. Taking a moment, perhaps even with a cup of tea in hand. Simply seeing what the shrub tells you is a way to begin.
If nothing is obvious, that’s perfectly normal. Without knowing where you’re headed, you can still explore.
After considering the shrub, take your pruners and step closer. Even if nothing obvious comes to mind, first reduce the decisions you’ll have to make. The three Ds of pruning: dead, diseased, and damaged.
Dead branches can often be identified easily. Their bark is shriveled, they are paler than surrounding branches, and if gently bent, they snap with a hollow sound. If unsure, prune off an inch at the tip. If the core shows green, it may still be alive. If not, it is clearly dead. Remove it.
Is anything diseased? Obvious cankers, blemishes, or signs of fungal growth should be treated with care. If a branch is diseased, disinfect your shears after each cut to prevent spreading it.
Finally, remove any damaged branches. This includes obvious breaks from winter or ice, but also branches that rub or cross. Over time, these will damage each other. Removing future points of damage is just as important as addressing present ones.
What this achieves is a reduction in choices. With fewer decisions to make, you can begin to see more clearly.
Step back again. Pause. Have a look at what your shrub looks like now.
This time, consider not only the shrub, but its context. Where is it? What is it doing in the space? Is it near a walkway, or part of a larger composition at a distance?
This is where the fourth D takes shape: design.
The hydrangea I’m considering today is planted close to a walkway, one of two lining the path. Behind it is a garage, and over time it has grown into the facade. It has also begun to push into the walkway.
Here, the goal is a narrower shape, one that rises upward rather than outward. It needs to remain thin between the walkway and the garage.
At this stage, it helps to understand how the plant grows.
This is a hydrangea paniculata. It buds at intervals, often in groups of two or three buds evenly spaced around the stem. From each bud, a new branch may form, and the direction of the bud is the direction of growth.
Pruning above a two-bud node may give you two branches. Above a three-bud node, possibly three. These buds often alternate direction along the stem, allowing you to choose future branch direction; whether growth moves into the walkway or runs parallel to it.
Some branches have grown sideways. Others are strong and upright. The upright ones, often with three buds, will form the main structure of the shrub going forward. These become load-bearing, shaping the plant over time.
These may be cut differently; lower, at a more intentional structural branching point, than smaller, twiggy growth.
When pruning, cut close to the bud. Leaving a longer stub results in dieback, which can invite insects or disease. A clean, close cut helps maintain the plant’s health.
With secateurs or loppers, keep the blade side toward the part of the branch you are keeping. This allows for a cleaner cut.
These design decisions are less obvious than removing dead or damaged wood. It is normal to pause, to step back several times, and reconsider.
Each cut changes the shrub. It changes the context for the next cut.
These decisions cannot be undone easily. A branch does not simply grow back.
Sometimes, there is no clear answer.
Shaping a shrub takes time. Often, it is a process that unfolds over years.
When you’re done, take a step back. Have a look. Notice what remains, and what may come.
You cannot fully predict how the shrub will respond, or which branches it will favor. You can only make a considered guess.
And when the decisions feel heavy, it is fine to stop. Sometimes the next correct move is not another cut, but to leave, and come back the next day.
Next year, in early spring, you will return. You will stand back again, perhaps with a cup of tea in hand, and look.