Malus prairie fire and John Downie losing foliage

[Andy...]

HELP 

Both my crabapples are shredding. This is the 1st season I have planted both, they came out beautiful around a month ago, the John Downie still has leaves but the prairie has almost gone completely, the trees are still pretty young about 5ft each. I'm especially upset about the prairie as I got it for my wife as a remembrance to her recently late grandmother. I'm guessing these trees are supposed to grow leaves and keep them until the autumn. 

Can anybody help please would be much appreciated. 

Thanks Andy 

[JAG63]

How regularly are you watering and how much, what's their location?

 

[Andy...]

To be honest its been raining that often lately i havent hwd to water them too often but otherwise id say every few days. They are located at the back of my garden id say they get sun and partial shade as the sun drops down. They bloomed out lovely but didnt last long maybe a few weeks ☹

[Paul in the woods]

Any signs of new life? I've got a couple of Evereste crab apples in my orchard and they leaf out very early. This year we had some very strong winds, 80+ mph, and they look terrible. All their leaves were burnt off and hardly any fruit survived. They are showing some fresh leaves now and should recover.