Step 3: Finding the Right Depth
Depth matters when you plant your hydrangeas, but they aren’t a type of flower that’s as dependant on how deeply you plant them (such as tulips to name just one practical example). As a rule, when you’re planting from seeds, remember that you want to plant them deep enough so that they can take root in the soil (and not be washed away by the first watering) – but not so deep that they never get their growth activated.
Just a few inches will do for the initial planting.
The same is true when you’re transplanting existing plants instead; consider the depth of the existing roots system and make sure they have more than enough room for the system to take root, but pack soil loosely enough when filling up the hole so that you don’t choke or end up damaging the roots.
If transplanted hydrangeas are unhappy, it can sometimes help to wet and loosen soil were too tightly planted – but always be careful around the roots!