What is the best fertilizer for Miss Belgium hydrangea?

Compost and nutrient-rich seed starting mix for sowing and transplanting and liquid, non-nitrogen-heavy, organic garden fertilizer and organic mulch in spring describe the best fertilizers for Miss Belgium hydrangeas (Hydrangea macrophylla 'Miss Belgium'). The mulch must have at least a 1-inch (2.54-centimeter) separation between when it begins and the hydrangea base ends and must not be mounded any higher than 2 to 3 inches (5.08 to 7.62 centimeters). Any fertilizer schedule needs to be coordinated with light checks of partial shade to full sun, with moisture checks for upper 5 inches (12.7 centimeters) of soil no drier than a wrung-out sponge, with soil analyses (since Miss Belgium hydrangeas require soil pH levels between 4.5 and 5.0) and with space checks of 48 inches (121.92 centimeters) between plants.