My hydrangeas won't bloom. I do not prune them. I only cut off the old dead stems in the early spring. I planted this 8 years ago and it's huge, but never blooms. HELP
Here is an article that you may find helpful: https://www.gardeningknowhow.com/ornamental/shrubs/hydrangea/hydrangea-not-blooming.htm
The leaves on my hydrangeas look diseased, what could be causing it? How can I treat them? I also think I see spider mites. What treatment is best?
Try neem oil. It's an effective insecticide and works great on spider mites. As a bonus, it's also a good fungicide. Here is more information: https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm
Why doesn't my hydrangea bloom?
You may be lacking phosphorus. If there is a lack of phosphorus in the soil, plants will have little to no blooms. You can either use a phosphorus rich fertilizer or add some bone meal to the soil. These articles may help as well: https://www.gardeningknowhow.com/ornamental/shrubs/hydrangea/hydrangea-not-blooming.htm
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/phosphorus-plant-growth.htm
How to grow hydrangeas in hot climate.
The growing conditions would be the same, though you may want to give the shrub a bit more afternoon shade in much warmer climates. Also, allow more spacing between plantings to encourage airflow and avoid fungal issues. This article will also help: https://www.gardeningknowhow.com/ornamental/shrubs/hydrangea/growing-hydrangeas-hydrangea-care-guide.htm
I have a beautiful old Hydrangea. It usually has beautiful blue flowers. (I dry many of them. ) The last 2 years the flowers only open on the outer edges and the center buds don't open. We water and have mulch around the plant. We prune only the dead stems when necessary. We've done everything we know to do but nothing is working. Please help if you can. Thank you.
It is likely lacking a good phosphorus/nitrogen balance in the soil. Too much nitrogen or too little phosphorus will cause it to fail to bloom or reduce its flowering potential. This article will have some other suggestions as well:
https://www.gardeningknowhow.com/ornamental/shrubs/hydrangea/hydrangea-not-blooming.htm
I purchased both a blue and a white hydrangea, and have not planted them out yet, but they stand together in a semi shady spot and are regularly watered. The white flower has started to go pink. What would cause this, and is there anything I can do to return it to white?
Hydrangea colors are based on nutrients in the soil. This article will explain more: https://www.gardeningknowhow.com/ornamental/shrubs/hydrangea/change-hydrangea-color.htm
I have had to cut off a lot of my Hydrangeas due to leaf spot and the blooms that started out so beautiful turned out almost burnt looking. How do you treat for fungal spot, and did the fungus cause the blooms to turn brown or was that just caused from the sun?
This was likely caused by sun scorch, but it will not hurt to treat the shrub with neem oil, which is an effective fungicide, just to be safe.