How To Look After White Hydrangea. Best soil for hydrangeas. Hydrangeas thrive in organically rich soil so dig in additional compost and cow manure at planting.
Plants are problem-free as with standard Hydrangeas and will grow in sun or partial shade. Spread a 2- to 3-inch-thick layer of garden compost leaf mold or other organic material over the plants root zone to help conserve soil moisture but. Hydrangeas grow well in soil containing an abundance of organic material.
You will want to aim for using a balanced slow-release fertilizer.
If the soil is at a depth of half an inch dry then you should water the plant. Best soil for hydrangeas. Fill the containers or pots where your hydrangea will be planted with the correct potting soil. The amount of water can be different.