Hydrangeas and BougainVillea discoloured/wilting

As my hydrangeas come out, I've noticed that they are becoming discoloured on the leaves as well as some leaves being twisted and not looking particularly healthy. Also a bougainvillea I bought the other day is already having it's leaves turn dark, wet and go limp as though they are dying. I attach photos of my plants. Can anyone suggest what I might be doing wrong? Too much sun? Too much water? Need feeding?

 

Looks like frost damage to me.

 

If you have just bought a Bougainvillea you should have kept it inside, it does have frost damage and cannot take frosts unless gradually acclimatised to the cold nights and even then mature specimens will have leaf damage.
Cut the scorched leaves off and only put it outside when the nights don't go below 10c (50f).
It should start growing then.

 

Ok thanks for the advice, it's inside now so will keep it in a sunny place until the weather warms. Is the same the case for the hydrangeas with their leaf discolouring?

 

Yes it's frost damage to the Hydrangea as well. You don't say where you live? Maybe others will disagree but I personally have never seen healthy Bougainvillea growing anywhere outside in the UK. It grows like a weed and extremely rampant in the likes of Egypt and South Africa but it doesn't go a bomb on UK winters. The Hydrangea should be fine tho.

 

I'm in Surrey, Egham to be precise so SE England. I know, I did get warnings from the Bougainvillea sellers about the difficulty of growing it outside but I thought I'd give it a go and see if I could make it work. Seems I was far too overconfident! Perhaps if summer warms up a bit I'll take them outside but looks like I'll have to make them indoor plants for now

 

You might just get away with the Bougie on a south or west wall.
Could need root protection though, I've been growing one for the last four years and its ok on the wall but shoots that are away from the wall die back due to frost each winter.

 

Have several varieties of Hydrangea on my property, have not seen that before. Hope the plant is right for your zone. Mine remains in semi shade or shade all do well there. during the hot summer weeks in August I may see a minor droop and will give them water, other that I let mother nature take care of them. and I rarely fertilize, I cannot remember when I last did. Think fertilizing is over rated. have some pics here from last year.