In this case, the solution is simple – moving the citrus tree to another part of the courtyard that receives afternoon shade is all that is needed to prevent further sunburn damage. OR, 50% shade cloth can be used from mid-May through September.
Citrus does best when planted at least 10 – 15 ft. away from walls, which absorb the heat of the day and re-radiate it out.
Avoid planting where they get the full force of afternoon sun.