Mulch: The best mulch components are leaf mold, coco peat and some organic matter or humus. You can also include, shredded newspapers and card boards. Remember, leaf mold cools the soil more than anything else. See the following arabian jasmine, though in soil bed, i have mulched it with leaf mold and coco peat around 2 inches depth.
This is how it will look closely. Don't forget to keep the mulch away from the main stem. Mulch will protect the plant from outside heat but not the bottom heat which is coming from the floor and stressing the roots.