I'm new to this forum and newbie for gardening. This is my first time planting hydrangea. I leave in Boston area. I brought a 3 Gal blue hydrangea from a local garden store and planted under my big blackberry tree. The spot has a lot of sun in the early morning, and is total under the shadow in the afternoon. The plant looks great in the first 2 days, then the flower looks dead in the next afternoon. After that, the leaf does not look healthy at all. I watering 3 times per day only one min each time. I don't know what went wrong.
BTW, this is my first time buying from this highly rated local gardening store (not much choice in my town, either this or Home Depot). I also brought 2 other small plants together, they start showing the same problem. Is it the problem from transplant or how the store kept the flowers?
I attached the pictures I took this morning.
Thanks for any advice.
David the new gardener