If this is a newly planted shrub, its leaves may not yet be used to being in the sun so the leaves this year/next year will be more sensitive than in future years as it is used to being in greenhouses and not in the sun.

Looks like it is getting a little too much sun and may need a little more water. But it seems small so its root system probably has a hard time when the leaves loose moisture fast in the summer and the roots cannot yet absorb as much water as quickly as they need.

Make sure that it gets sun until 11am or so. Or use "artificial means" to provide additional shade: outside chairs, umbrellas, etc. Use a finger to test the soil at a depth of 4" and water when it feels dry or almost dry. Since summer is about to start, start watering a larger amt of water per watering now or soon. Maintain the mulch all year around. Maintain the soil as uniformly moist as you can with no periods of dry if you can help it. ;o)

If the leaf edges turn brown and the browning moves inwards, it needs more water than it is getting. If the leaves in direct contact with the sun turn yellow/white/brown ish colors, it is getting sunscorch (too much sun).

If you want to transplant it, do it now before the full summer conditions arrive.

Luis