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Everything You Need to Know
About Growing Hydrangeas
Popular deciduous hardy shrubs prized for their spectacular flower heads, generous foliage and reliable displays that brighten gardens from summer into autumn.
What We've Included:
When to Plant | Where to Plant | How to Plant | Borders | Containers | Aftercare | Seasonal Maintenance | Common Issues | Flowering Time | Inspiration
About Hydrangeas
It's the remarkable diversity of the Hydrangea that has made it one of Britain's favourite garden shrubs. Some produce huge, rounded mophead blooms; others elegant lacecaps or towering cone-shaped flowers; yet all bring impressive colour and structure to the garden over a long season.
Originating from woodland habitats across eastern Asia and the Americas, Hydrangeas naturally favour conditions that don't dry out too quickly. That heritage explains their lush foliage, vigorous growth and preference for sheltered positions where they can flourish year after year.
One of the most fascinating features of some Hydrangeas is their ability to produce different flower colours depending on soil conditions, with blue blooms typically appearing in acidic soils and pink blooms in alkaline ones. In contrast, white-flowered varieties and many other species remain true to their natural colour regardless of soil pH.
Although this guide focuses mainly on shrubby Hydrangeas, climbing Hydrangeas deserve a place in the conversation too. Rather than forming a bush, they cling to walls and fences with aerial roots, creating elegant displays in areas where many flowering plants struggle to thrive.
If you're planting Hydrangeas for the first time, you'll find everything you need to know below.
When to Plant Hydrangeas
Hydrangeas establish best when planted in spring or autumn, as cooler temperatures and naturally moist soil encourage steady root growth.
Container-grown plants offer greater flexibility and can be planted at almost any time of year, provided the ground isn't frozen, waterlogged or exceptionally dry. Bare-root Hydrangeas, where available, should be planted during winter dormancy.
The same planting times apply to climbing Hydrangeas, giving them plenty of time to establish before putting on vigorous new growth in spring.
Where to Plant Hydrangeas
The ideal position depends on giving Hydrangeas enough light without exposing them to the hottest part of the day. Morning sunshine followed by afternoon shade usually produces the healthiest foliage and longest-lasting flowers, particularly for mophead and lacecap varieties.
Shelter also plays an important role. Strong winds can damage large blooms and young shoots, while frost-prone spots may reduce flowering on varieties that produce buds the previous season.
Climbing Hydrangeas are an exception when it comes to shade. They perform particularly well on north and east-facing walls, adding colour and texture to areas where many climbers would struggle.
How To Plant Hydrangeas
Begin by clearing weeds and digging a planting hole around twice as wide as the root ball, keeping the depth roughly the same as the nursery pot.
Ease the Hydrangea from its container and gently loosen any circling roots before lowering it into position. The top of the root ball should sit level with the surrounding soil to avoid planting too deeply.
Refill the hole, firm the soil lightly around the roots and water thoroughly to settle everything into place.
Borders
Given room to mature, Hydrangeas naturally become the focal point of a border, so it's worth thinking about how they'll look once fully grown rather than immediately after planting.
Step 1: Allow enough room for the shrub to reach its mature height and spread without competing with neighbouring plants.
Step 2: Position taller varieties towards the back of borders, with compact forms closer to paths or seating areas where their flowers can be appreciated up close.
Step 3: Pair Hydrangeas with other moisture-loving perennials and shrubs for a balanced planting scheme.
Step 4: Leave space around each plant so air can circulate freely as it matures.
Step 5: Water regularly during the first growing season while the roots become established.
Containers
Hydrangeas adapt exceptionally well to container growing, provided they're given enough space to establish a healthy root system.
Step 1: Select a generous pot with drainage holes.
Step 2: Fill with a quality peat-free compost suitable for shrubs.
Step 3: Position the plant at the same depth as it was previously growing before filling around the roots.
Step 4: Firm gently and water well.
Step 5: Check moisture levels regularly throughout summer, as container-grown Hydrangeas dry out much faster than those planted in the ground.
Aftercare
Hydrangeas are surprisingly undemanding once settled, and most routine care simply helps them perform at their best rather than keeping them alive.
Step 1: Water deeply during prolonged dry spells, especially throughout the first growing season and whenever container-grown plants begin to dry out.
Step 2: Feed in spring with a balanced fertiliser to support healthy foliage and strong flowering.
Step 3: Apply a layer of compost or well-rotted organic matter around the base each year to help conserve moisture and improve soil structure.
Step 4: Remove damaged or diseased stems whenever they're noticed to keep plants healthy.
Step 5: Check container-grown Hydrangeas regularly during warm weather, as compost dries out much faster than garden soil.
Seasonal Maintenance
Hydrangeas don't all respond to pruning in the same way, so identifying the type you're growing makes all the difference. Fortunately, most varieties need only light annual attention to stay healthy and flower well.
Step 1: Leave faded flower heads in place through winter, where they help protect developing buds while adding interest to the garden.
Step 2: In early spring, remove old blooms from mophead and lacecap Hydrangeas by cutting back to the first healthy pair of buds.
Step 3: Panicle and smooth Hydrangeas can be pruned more firmly at the same time because they flower on new growth.
Step 4: Thin out weak or congested stems where needed to maintain an open, balanced framework.
Step 5: Climbing Hydrangeas rarely need more than light shaping after flowering if they begin to outgrow their space.
Common Issues & How to Solve Them
Hydrangeas are dependable shrubs, but a handful of common problems can occasionally affect flowering or overall growth.
Wilting in hot weather
Large leaves lose moisture quickly during prolonged heat. Deep watering at the base of the plant usually restores them once temperatures begin to cool.
Poor flowering
Incorrect pruning is one of the most common causes of disappointing displays, particularly on varieties that flower from buds formed the previous year. Heavy shade and late spring frosts can also reduce flowering.
Flowers changing colour
Some mophead and lacecap Hydrangeas naturally produce blue flowers in acidic soils and pink flowers in alkaline soils. Changes in flower colour are usually a normal response to soil conditions rather than a sign that anything is wrong.
Flowers turning green
As many Hydrangea blooms mature, they naturally develop green tones before gradually drying on the plant. This is part of the normal ageing process and often adds interest late in the season, particularly in autumn arrangements.
Yellowing leaves
Pale or yellowing leaves can indicate nutrient deficiencies, particularly where soils are unsuitable for the variety being grown. Improving soil health and feeding in spring usually restores healthy, vigorous growth.
Leaf scorch
Brown leaf edges or faded blooms often indicate excessive afternoon sun combined with dry conditions. A little more shelter usually resolves the problem.
Powdery mildew
This white fungal coating occasionally develops during warm, dry weather. Improving air circulation and removing affected foliage helps reduce its spread.
When Do Hydrangeas Flower?
Few shrubs offer such a generous flowering season. Depending on the variety, Hydrangeas begin blooming from early or mid-summer and continue well into autumn.
Mophead and lacecap Hydrangeas usually flower first, followed by panicle varieties that often continue producing fresh blooms into September. Oakleaf Hydrangeas extend the display even further, with foliage that turns rich shades of red, bronze and purple as autumn approaches.
Many flowers remain attractive long after they fade, gradually drying on the plant and providing texture throughout autumn and winter before they're removed in spring.
Find Some Inspiration For Your Garden
Hydrangeas have an easy way of bringing permanence to a planting scheme. Even before the flowers appear, their broad green leaves add substance to borders, while the blooms themselves can soften everything from formal layouts to relaxed cottage gardens.
For a timeless combination, plant them alongside Hostas, Ferns, Hardy Geraniums and Japanese Anemones, where contrasting foliage and overlapping flowering seasons create a layered display. Panicle Hydrangeas pair particularly well with ornamental grasses, adding movement and texture to contemporary borders.
If space is limited, a single Hydrangea in a generous container can become a striking feature on a patio or terrace. Climbing Hydrangeas, meanwhile, are one of the best ways to transform a shady wall or fence into a feature that becomes more impressive with every passing year.
Ready to Shop for Hydrangeas?
With so many beautiful varieties available, choosing the right Hydrangea is often simpler than it first appears. Mophead varieties are loved for their large, rounded flower heads, while lacecaps offer a more delicate, natural look. Panicle Hydrangeas cope well with sunnier positions and are among the easiest to prune, oakleaf Hydrangeas bring outstanding autumn foliage, and climbing Hydrangeas transform shaded walls and fences into long-lasting features.
Whether you're looking for a compact Hydrangea for a patio container or a statement shrub for a mixed border, there's a variety to suit almost every garden. Browse our full collection to find the perfect Hydrangea and enjoy reliable colour, beautiful foliage and spectacular flowers that return year after year.
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Hydrangea Arb. Annabelle
From £6.99Shop Now -
Hydrangea macrophylla Prince Collection
From £19.95Shop Now -
Hydrangea macrophylla Red Prince
From £14.99Shop Now -
Hydrangea Paniculata 'Phantom'
From £6.99Shop Now
