HYDRANGEAS
Hydrangeas have masses of flowers from mid summer to autumn with spent flowers giving further beauty until the first frosts. They are deciduous shrubs. Happy in most soil conditions with good drainage and enjoy good soil with fertiliser and/or compost to get them started. Grow in part sun, preferably in the morning and shaded from hot afternoon summer sun. Deep shade may inhibit flowering. Generally speaking, blue flowering shade of hydrangeas are intensified by acid soil conditions (apply acid fertiliser); pink and red shades by alkaline soils (add lime). If you garden in parts of New Zealand with winter frosts, leave old flower heads on shrub until spring to avoid damage to buds.