Hydrangeas thrive in evenly moist soil so improve the planting area (not just the planting hole) by digging in organic soil improver, such as garden compost or a manure-based soil conditioner. Add a bucketful per square metre (yard) for the best results.Plant your shrubby hydrangea soon after purchase. The best time to plant is in spring or autumn. Containerised plants can be planted all year round as long as the soil is not frozen, too wet, or excessively dry in summer (but you can water them well if you really want to plant them then).

Blue Hydrangea