My Hydrangeas were pruned 2 years ago and haven't had a bloom since and not growing. I live in central NJ. They are bout 10 years old. Any suggestions are very much appreciated.
There could be few reasons for your lack of flowers.
Improper pruning and to much Nitrogen in the soil are the likely issues.
You do need to know what type of Hydrangea you have as some bloom on old wood and some on new wood.
Here are a few links with more information.
https://www.gardeningknowhow.com/ornamental/shrubs/hydrangea/hydrangea-not-blooming.htm
https://www.gardeningknowhow.com/ornamental/shrubs/hydrangea/prune-hydrangea-bushes-hydrangea-pruning-instructions.htm
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/bone-meal-fertilizer.htm
My Hydrangea bush is about 3 years old. Plenty of wonderful leaves but very few (3) blooms during the summer. Seems very healthy except for blossoms. How do I prepare for winter?
Here is a few articles that will help you.
https://www.gardeningknowhow.com/ornamental/shrubs/hydrangea/hydrangea-not-blooming.htm
I would be grateful if you could advise when and how I should prune my hydrangea. There appears to be a lot of advice but depends on the type of hydrangeas. My hydrangeas have new and old wood. On some of the new wood, there appears to be new shoots. What should I remove and what should I leave, and when should it be done? I attach two photos. Thank you for your assistance Geoff Mason
You can dead head and trim up all Hydrangeas when needed.
Remove any damaged or dean branches as needed.
Pruning recommendations are different for each variety.
If you really are unsure of the type of Hydrangea you have, and the bush needs to be cleaned up and size reduced, trim no more than 1/3 of the plant in one cutting. Do this after blooms have faded.
Here is a link with more information.
Info on how to look after hydrangeas once picked (e.g. in a vase).
Here is how I like to treat cut Hydrangea!
When I cut them outdoors I put them in a bucket of fresh water.
After bringing indoors I recut the stems and place them in hot water for at least 15 mins.
Then I place them in fresh room temperature water and add floral preservative as directed on the package.
Every couple of days refresh the water and recut the stems if the flowers are wilting.
My hydrangeas are starting to get their leaves. When should I fertilize them?
Here is a link that will help you.
https://www.gardeningknowhow.com/ornamental/shrubs/hydrangea/fertilizing-hydrangeas.htm
When and what fertilizers should be applied to established hydrangeas in Zone 9b?
Here is an excellent article to help you.
https://www.gardeningknowhow.com/ornamental/shrubs/hydrangea/fertilizing-hydrangeas.htm
We do not prune it. It looks like it is leafing out on new stems. What do I need to do? It should bloom blue.
Some hyndrangea grow flowers off of new wood and some of them will grow flowers off of old wood. Looks like yours grows flowers off of new wood. There is nothing you need to do except to be patient. :)
For more information on hydrangea blooming issues, please visit the following link:
https://www.gardeningknowhow.com/ornamental/shrubs/hydrangea/hydrangea-not-blooming.htm