Cherry Blossom trees looking poorly

a1154

i have only just noticed how poorly my cherry trees look. I have a (short) avenue with conditions on the left and the right being different. It’s dryer and sunnier on the right, wetter on the left. The dryer side look better, though I think they are all peaky.
It seems I got hardly any blossom at all, the buds are lying on the floor. They are now in leaf, but they don’t look nearly as leafy as usual. 
We had a very dry winter, had the dry hot spring weather, then cold and frosts, and since then a bit of rain.
any thoughts on what has happened? If the blossom died off due to a late frost that’s ok, but what about the leaf? 
They are tai haku btw. I can get pics tomorrow. 

Lizzie27

I expect they're suffering from lack of water. I would put the hosepipe on them for a good hour or so and see if they perk up.

a1154

It does sound like lack of water, though the ones on the dryer side look better than the wetter side. 
I don’t usually water anything once established so that might well help.