Great pics Debbie. I think it is a combination of a couple of things.
1) Place them out of the pm sun.
2) Water them in the mornings, don't give them a lot of water in late afternoons or evenings, you'll rot the roots. Keep them moist but not soaking wet.If the foliage has wiltered by late afternoon, just spray the foliage if possible with rain water.
3) Are you feeding them a balanced feed ie NPK 20-20-20, a quarter strength at every watering.
4) Try above for a 10/14 days, if you are still getting yellowing leaves, then it could also be a lack of magnesium. Feed once with a dose of Horticultural Epsom Salts. One level dessertspoon into 2 gallons water.
Let us know how you get on. - Kath:)

Hi Debbie
Got to set up a Website so I can post Pics like yours.
As soon as I saw them I thought 'stress'. It looks like the change in weather has taken it's tole on the plants. A little more shading would help and watch out for those hot drying winds. They are causing me a lot of problems this year. Kath gives great advice.
Good Luck,
IanS

Digital cameras are great and instant pictures.
Thank you so much for your suggestions!!
I will move the one planter cause its in sun most of the day the other two are morning sun only. My friend said the same as you both did, over watering, Hubby didn't water them today Hee hee :) Today we hit a high record in heat after many days of rain and cool weather. Miracle grow we use, when ever hubby thinks about it so will work on a balanced feeding and will pick up magnesium, will follow your suggestions and let you know how my trees start looking :)
Thank you so much!
Debbie :)