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Hydrangeas in pots care, position and the best varieties
Hydrangeas are, for me, the most romantic plants of all. That lavish flowering in creamy pink, white and lavender-blue – no other shrub does it. And the loveliest thing: they grow beautifully in pots, so even those without a garden can enjoy hydrangeas on the terrace. They're a little more demanding than many other container plants, but anyone who knows the basic rules for watering, pruning, feeding and overwintering hydrangeas will be rewarded with a sight that delights anew every summer.
Last updated: 3 June 2026
Hydrangeas in pots: what really matters
Keeping hydrangeas in pots is a little more work than in a bed, because in a pot they dry out faster and use up nutrients faster. The four most important factors: acidic soil (this is the most common mistake – ordinary soil makes them ill), plenty of water (daily in heat!), regular feeding and a large pot with good drainage. Anyone who follows these four points will be rewarded. Hydrangeas also fit wonderfully on a small terrace – they're both eye-catcher and room divider, and need only a single pot.
Caring for hydrangeas in pots: watering, pruning, feeding, overwintering
In principle, hydrangeas in pots come down to four things: the right soil (acidic, pH 4.5–5.5), enough water (daily in heat, always with soft water), the right pruning (never into old wood with mophead hydrangeas) and a little winter protection for the pot. Take these to heart and your terrace hydrangea will give you joy for years. Ignore one of these points and you'll wonder next spring why it isn't flowering. You'll find all the details in the individual sections – from the right soil to overwintering.
1 · The right pot large, with drainage
Hydrangeas need plenty of room for their roots – choose a pot at least 30–40 cm in diameter, larger is better. The bigger the pot, the more stable the moisture and the less often you have to water. Material: terracotta looks lovely but dries out faster. For hydrangeas I prefer a plastic pot inside a terracotta cover pot – the best of both worlds. Drainage holes in the base are a must. Put in a layer of expanded clay or pebbles as drainage, then the soil. Tip: stand the pot on castors – hydrangeas need a different spot in winter than in summer.
2 · The right soil acidic is a must
This is the most common mistake with hydrangeas in pots: using ordinary potting or all-purpose compost. Hydrangeas need acidic soil with a pH between 4.5 and 5.5. Only then can they take up nutrients. Too high a pH leads to chlorosis – yellow leaves with green veins. Buy special rhododendron or hydrangea compost, or alternatively azalea compost. Renew this soil every 2–3 years, or at least swap out the top layer (10–15 cm). Extra tip: blue hydrangeas turn even bluer if you occasionally acidify the watering water with a splash of lemon juice.
3 · Position partial shade, no fierce midday sun
Hydrangeas like light, but not a spot in fierce midday sun – the blooms scorch then and hang limp. Ideal is a place with morning or evening sun and light shade from noon to 3 pm. An east-facing aspect is often perfect. On the country-style terrace, hydrangeas look especially lovely against light walls or by a pergola that provides partial shade. Avoid very windy spots – the wind dries the blooms out and the pot tips over.
4 · Watering daily, plenty, with soft water
Hydrangeas are water-lovers – the opposite of lavender. In a pot they dry out quickly and then drop their flowers at once. In summer water daily, in heat morning and evening. Push a finger into the soil: if the top layer (5 cm) feels dry – water immediately. Rainwater is better than tap water because it has less lime. If you only have tap water, leave it standing overnight in a watering can (that lets some lime settle out). Tip: bigger pot = less frequent watering. Always worth it.
5 · Feeding regularly from April to August
In a pot, hydrangeas use up nutrients faster than in a bed. From April to August, feed every 2 weeks with a special liquid hydrangea or rhododendron feed. This is formulated for acidic pH and contains the right nutrients for lavish blooms. From September onward stop feeding – the plant should go into its winter rest. No all-round feed with a high nitrogen content: it makes plenty of leaves but few flowers.
6 · Pruning less is more
Hydrangeas (mophead and lacecap) flower on old wood – which means the flower buds for next summer are formed as early as autumn. Pruning too hard in autumn or winter destroys the flowers. My rule: in spring (March/April) remove only the dead flower heads and frost-damaged shoot tips – no further. I leave the old flower heads standing over winter: they protect the buds beneath them from frost and look enchanting with hoarfrost in the winter garden. Panicle hydrangeas (Hydrangea paniculata), by contrast, may be cut back harder in spring – they flower on new wood.
7 · Overwintering protect the pot, save the buds
Overwintering hydrangeas in pots is a little more work than in a bed, because the pot protects the roots less than the ground does. How to do it: from October water less. Place the pot against a sheltered house wall (avoid the north wind). Wrap the pot in jute sacks, fleece or bubble wrap. Stand it on feet or wooden blocks. Don't wrap the plant itself – that encourages mould. Remove the old flower heads only in spring; they protect the buds beneath. In hard frost (below -10 °C): additionally pack the pot in a thick layer of leaves. With this method my hydrangeas have overwintered without trouble for years.
8 · The best varieties for pots my favourites
Not all hydrangeas are equally well suited to pots. These are the hydrangea varieties for pots I recommend most often: Hydrangea macrophylla 'Endless Summer' – flowers on old and new wood, so it forgives an accidental cut, with a long flowering season. Hydrangea arborescens 'Annabelle' – white, very lavish, but needs a very large pot (at least 50 cm). Hydrangea arborescens 'Incrediball' – huge white flower balls, robust, more wind-stable than Annabelle. Hydrangea serrata 'Bluebird' – smaller lacecap flowers in blue, compact, ideal for medium-sized pots. Hydrangea paniculata 'Limelight' – creamy-white-green flowers, very robust, suited to sunnier spots. All these varieties fit wonderfully into a romantic country garden.
Hydrangeas in pots at a glance
The five most common mistakes and how to avoid them.
- Wrong soil · always use acidic rhododendron compost, pH 4.5–5.5
- Too little water · in heat water daily, never let it dry out
- Pruning too hard · mophead hydrangeas flower on old wood, remove only spent heads
- No winter protection · wrap the pot, choose a sheltered spot
- Wrong feeding · only hydrangea or rhododendron feed, regularly until August
If the leaves turn yellow with green veins: the pH is too high. Switch to acidic soil at once and help things along with a feed for acid-loving plants.
Why won't my hydrangea in a pot flower? the 5 most common causes
This is the most frequently asked question of all about hydrangeas in pots. The answer is almost always one of these five causes: 1. Wrong pruning: mophead hydrangeas flower on old wood – cutting hard in autumn or winter removes next year's flower buds. 2. Wrong pH: too high a pH leads to chlorosis (yellow leaves); the plant can't take up nutrients and forms no flowers. 3. Too little light: hydrangeas need bright partial shade – deep shade gives lots of greenery but barely any flowers. 4. Too little water: chronic water shortage inhibits flowering. 5. Too much nitrogen: the wrong feed encourages leaf mass instead of flowers – always use a special hydrangea feed.
Position for hydrangeas in a pot what really matters
The ideal position for hydrangeas in a pot on the terrace: bright partial shade, sun in the morning or evening, shade at midday. An east-facing aspect is often perfect. Important: hydrangeas don't like a cold north wind – that dries the blooms out and inhibits growth. On the terrace they look loveliest against light walls or under a pergola roof that provides the intense midday shade. In high summer: if the leaves droop at midday, the plant needs water immediately – it's not lasting damage as long as you react quickly. If you stand your hydrangea pot on castors, you can respond flexibly to the weather and push the plant into the shade.
Feeding hydrangeas in pots when, how often, with what
Feeding hydrangeas in pots is easier than many think: from April to the end of August, every two weeks with liquid hydrangea or rhododendron feed. This is matched to the acidic pH and contains all the necessary micronutrients. From September onward stop feeding – the plant should go into its winter rest. If you prefer a slow-release feed: push special slow-release hydrangea stakes into the soil once in spring. But take care: no all-round feeds with a high nitrogen content (N) – these encourage leaf mass at the expense of flowers. A bad sign: lots of green foliage but barely any flower buds. Then change the feed and check the pH.
Hydrangeas in pots – your questions, my answers
How often should you water hydrangeas in pots?
In summer daily, in heat morning and evening. The soil must never dry out completely. Prefer rainwater.
Which soil for hydrangeas in pots?
Rhododendron or hydrangea compost at pH 4.5–5.5. Not ordinary potting compost – too high a pH causes chlorosis.
Why won't my hydrangeas in pots flower?
Most common causes: pruning too hard in autumn (buds removed), the wrong pH, too little water or too little light.
Which hydrangeas are suitable for pots?
Mophead and lacecap hydrangeas stay more compact. 'Endless Summer' is especially good because it also flowers on new wood.
How do I prune hydrangeas in pots?
For mophead hydrangeas (Hydrangea macrophylla), in spring remove only the dead flower heads – never cut into old wood! Panicle hydrangeas may be cut back harder, as they flower on new wood.
Which soil for hydrangeas in pots?
Acidic rhododendron or hydrangea compost at pH 4.5–5.5. Not ordinary potting compost – too high a pH leads to chlorosis (yellow leaves with green veins). Renew every 2–3 years, or at least swap out the top layer.
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"A hydrangea in a pot is the easiest way to turn a terrace into a romantic retreat. It asks for little – only acidic soil and plenty of water."
Treat yourself to a hydrangea this summer in that big terracotta cover pot you've had your eye on for so long. Stand it in a partly shaded spot, water it daily and watch it unfurl in July. There's hardly a sight in summer lovelier than a full hydrangea in creamy pink – on your very own terrace.
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