Hydrangas not blooming
My hydrangas have several buds on them, but they don’t open. What would be wrong???
Certified GKH Gardening Expert
When they are not opening fully, then this is usually a sign that there is a lack of potassium and phosphorus in the soil. You can, either, amend the soil with a topdress of compost, or add something higher in phosphorus and potassium, such as potassium phosphate.
This article help you with the care of hydrangeas in the meantime: https://www.gardeningknowhow.com/ornamental/shrubs/hydrangea/growing-hydrangeas-hydrangea-care-guide.htm