Posted: 31/05/2015 at 08:59
Q1, I can see a laurel but otherwise need more detailed photos
Q2 They look very ill
Q3 I would water them in very well then just make sure they didn't dry out. Too much water can be as bad as too little.
Q4, a good watering, a can full each, when they start to dry out rather than water every day.
Can be reduced over time by next year you'd only need to water if a drought.
Show us all the plants, one at a time. My initial thought is of a poor choice of plants here. A mixed hedge needs to be made of plants that fit well together with much the same growth rate and cutting requirements
Laurel is a massive plant, useful for a large scale hedge but not a space like that. It will overwhelm other plants in no time.