Search anything about how to care info in this website.
How To Care For Newly Planted Hydrangeas. Protect new hydrangeas from sun. Most varieties thrive in full sun to part shade as long as they are planted in moist rich soil.
Use a compost leaf mould or well rotted manure mulch around the plant to conserve moisture. Water newly planted hydrangeas at least twice a week or as needed to keep the soil evenly moist but not soggy. We just planted new hydrangeas that I bought at Lowes.
Provide plenty of water.
The best time of day. If the soil becomes dried out they will visibly wilt. We live in Zone 8. They should be planted in a moisture retentive soil that is well drained.