Why Isn’t My Hydrangea Blooming? // Garden Answer
Why Aren’t My Hydrangeas Blooming
When your hydrangea won’t bloom, it is often due to the species of hydrangea you’ve planted. Here’s the key to understanding your plant: some hydrangea varieties grow flowers off new wood, and some grow flowers off old wood. If your hydrangea won’t flower, you’ll want to figure out which variety you have. Hydrangeas that flower off of newly grown wood don’t present much of a blooming problem.
If you have a hydrangea that won’t flower, you may have pruned it back too far the year before. Often, hydrangeas that aren’t producing flowers have been pruned in early summer and late winter. If they are over pruned, they’ll have a tendency to die back more than normal and they’ll make you wait a whole year before they blossom again.
The solution: Prune your hydrangea only in the early spring when you can see the dead wood. Again, if you see your hydrangea not blooming, make sure you know what type it is and note how far back it died the year before. Remember, it may need that old wood in order to bloom.
Finally, if your hydrangeas are not flowering and you’ve determined that nothing here applies so far, you may want to have your soil tested. If your soil has an abundance of nitrogen, your hydrangea may have lush green growth and no flowers. Hydrangeas, like so many other flowering plants, need phosphorus in order to properly bloom and flower. Adding bone meal is a great way to increase the phosphorus in the soil. Also, keep this in mind when choosing a fertilizer for your plants.
Some of the most common hydrangea plants come from the big-leaf family, or Hydrangea macrophylla. These produce beautiful blue or pink flowers. However, there are many different cultivars created from this family of plants, and many of them tend to die back to the base of the ground in the cold of winter.