Growing an olive tree in a pot

Yes, olive trees (Olea europaea) can grow in pots for decades, and the Royal Horticultural Society even considers them better suited to a large container than garden soil in a cool climate: outdoors in summer sunshine, brought into frost-free shelter for winter¹. A pot gives mobility. In return it removes two protections the ground provides effortlessly: soil dries much faster, and roots feel cold before foliage does².

Can it stay in a pot all its life?

Yes, because it grows slowly. The RHS gives a mature height of 4 to 8 m (13 to 26 ft), taking 20 to 50 years to reach it; NC State gives up to 9 m (30 ft) in the ground and classifies growth as slow³⁴. In a pot, those figures do not apply: root volume limits the crown, and a restricted rootball slows growth by itself⁵.

To maintain the outline, the RHS recommends shortening main branches every year in early spring, cutting above a replacement shootA healthy, well-positioned young shoot facing outwards that takes over from a shortened branch and preserves a natural shape.¹. A terrace olive thus keeps its size for years without losing its habit. The principle applies to most container shrubs, and plant pruning explains it species by species.

La coupe se place toujours au-dessus d'un départ vigoureux, jamais au milieu d'une branche nue : pruning an olive tree suit cette seule règle de position.

In return, potting mix decomposes and its level falls over the years⁵. Care shared by potted and in-ground trees, from pruning to disease, is covered in olive tree care; this page focuses on what the pot changes.

Which pot should you choose for an olive tree?

The RHS specifies a 30 to 35 cm (12 to 14 in) pot, or one wide enough to accommodate the roots comfortably¹. That figure is for a young plant; an older tree moves up in stages when repotted. Drainage holes in the base are essential, whatever the material².

Material	What it changes	Watch point
Unglazed terracotta	Porous, dries quickly	May crack in winter: choose frost-proof pottery
Plastic	Lightweight, dries more slowly	Degrades in sunlight over the years
Metal	Unaffected by frost, long-lasting	Heats quickly in summer, becomes very cold in winter
Wood (half-barrel)	Traditional for fruit trees	Eventually rots: line with a bag pierced for drainage

For terracotta, the RHS makes a useful distinction: prefer frost-proofNot splitting under frost because high-fired clay absorbs very little water. The term “frost-resistant” promises less. pottery to merely “frost-resistant” pottery². Metal withstands frost but transmits everything: summer sun and winter nights alike reach the roots, July and January respectively in the source’s seasonal example².

Think about wind too. An olive carries a dense crown on a slender trunk, and a tall, narrow pot tips easily: a broad-based container in shelter avoids a fall².

Variety matters as much as the pot. NC State describes 'Little Ollie' as compact and rounded, and 'Swan Hill' as flowerless and fruitless, leaving no olives on paving⁴. Fruiting varieties in the olive botanical profile, such as Arbequina and Picholine, fruit better with two varieties, as explained in choosing an olive variety⁴.

What soil does a potted olive need?

Olive wants mineral, gritty soil rather than light potting mix. The RHS recommends a gritty loam-based mix¹; for growing under cover, its profile specifies John Innes No. 3 with added coarse sand³. In French garden centers, the equivalent is Mediterranean-plant potting mix mixed with loamGarden soil with a balance of sand, silt and clay, holding water without becoming saturated. It adds weight and stability to potting mix. and river sand. Chalk does not bother it: the RHS lists chalk among suitable soils³.

A layer of clay pebbles or gravel at the bottom does not improve drainage. Soil specialists have measured this for almost a century: water only moves from fine soil into coarse material once the fine soil is saturated⁶. The layer therefore creates a perched water tableA saturated zone above a coarser layer: water cannot drain down until the finer soil above is waterlogged. just beneath the roots, the opposite of the intended result. A uniform mix throughout, clear holes: that is where drainage happens.

The effective drainage step happens beneath the pot. The RHS asks for pot feet to raise it so excess water can escape¹. Olive growers put it another way: olive likes water that passes through, not water that stays, and standing water can kill it by depriving roots of air⁷.

When and how should you plant an olive in a pot?

In local spring, outside frosty periods. In its French seasonal setting, France Olive places planting between mid-March and mid-June, depending on area, since a newly planted tree is vulnerable to frost below −6 °C (21 °F) during its first months⁹. For pots, make two choices before filling: pot feet and the final position, since a large full tub cannot be moved. The RHS also asks for slow-release fertilizer granules mixed into the potting mix¹.

Planting itself, from untangling the rootball to watering it in, follows the same steps as repotting plants⁵.

Then place it in sun, sheltered from wind, ideally against a south-facing wall in the RHS’s UK growing context: this is the position it gives for olive³. To surround it on the same terrace, other plants for a south-facing position tolerate that sunshine readily.

Watering a potted olive through the seasons

A potted olive loses the advantage of deep soil. NC State calls it drought-tolerant once established, but a pot offers no reserve to draw on⁴. Its small, silvery foliage still places it among plants the RHS leaves longer between waterings⁸.

There is no fixed frequency, only a test. Push a finger a third of the way down the pot: dry there means water; still moist means wait⁸. This is the general rule for watering plants in pots. A summer shower only wets the top few centimeters: test after rain too.

Water slowly, in one session: fill to the rim, let it soak in, repeat, and stop as soon as water appears at the holes. Water early in the morning or in the evening, onto soil rather than foliage⁸. In the RHS’s UK aspect example, a terracotta pot facing south or west in hot, windy weather dries far faster than a large north-facing pot⁸.

In winter, watering becomes rare but does not stop. An evergreen can be thirsty in dry, windy weather, especially under cover where rain cannot reach it: check once a week, and never water when frost is forecast¹⁰.

Leaves yellowing then falling while soil stays wet signal the opposite of thirst: root suffocationDeath of roots deprived of oxygen in waterlogged soil. In olive, it causes dying shoots and a weak tree.⁷. Overwatering details the signs, and yellow leaves helps rule out other causes.

Feeding a potted olive

Each thorough watering carries some nutrients out through the holes⁸.

For a shrub permanently in a tub, the RHS uses controlled-release fertilizer, applied at planting, top-dressing or repotting¹⁰. If olives are the aim, it adds monthly balanced liquid feed during growth¹.

The French profile’s calendar for its source climate puts the window from March to August, with none in winter: follow active growth locally. In its UK seasonal context, the RHS suspends feeding after late summer until mid-spring¹⁰. A deficiency or, conversely, excessive salts in potting mix can be identified using the pages grouped under plant fertilizers.

Un excès d'azote donne des pousses molles et peu de fleurs : feeding an olive tree se choisit selon qu'on veut des feuilles ou des fruits.

Protecting a potted olive in winter

The tree is hardy; its rootball much less so: in a pot, roots die around −6 °C (21 °F), while leaves tolerate around −12 °C (10 °F)¹¹. Bring it into a frost-free, bright, cool room, or leave it outdoors tight against a wall, branches fleeced, on pot feet and sheltered from prolonged rain¹¹⁰.

Entre la véranda, le garage et le mur sud, chaque abri a ses limites : overwintering an olive tree se décide selon la température la plus basse de votre hiver.

Repotting or top-dressing a potted olive

Repot an olive every few years, rather than every spring, preferably in spring as growth resumes⁵. The size rule is strict: the new pot should be no more than a third larger; below 25 cm (10 in) diameter, aim for 2.5 to 5 cm (1 to 2 in) extra, no more⁵. An oversized pot holds soil no roots are drinking from, and that is where rot develops.

Once a pot becomes too large to move, two options avoid changing containers. First: root pruning, removing up to 15% of the rootball every few years⁵.

The gentler second option is top-dressingReplacing worn-out soil at the top and sides with fresh potting mix, without changing the pot or disturbing large roots.: removing old soil from the top and sides of the rootball and replacing it with fresh mix⁵. In years without repotting, this maintains the reserve; refreshing potting mix explains the method.

Frequently asked questions

What are the drawbacks of a potted olive tree?

Three manageable constraints: summer watering, because a pot's reserve is small; protecting roots from winter frost; and renewing depleted soil. NC State also notes scale insects and root rot as possible problems⁴.

Can a potted olive stay outdoors in winter?

Yes along the Mediterranean coast and anywhere with little frost, with the pot raised, sheltered from rain and tight against a wall. Elsewhere, bring it into frost-free shelter: roots suffer heavy losses once the rootball approaches −6 °C (21 °F), well before branches suffer¹¹¹.

How long can an olive tree live in a pot?

Decades, provided soil is renewed and the rootball protected from frost. Olive grows slowly: the RHS allows 20 to 50 years to reach mature size³, and France Olive places adulthood in the ground between 35 and 150 years, sometimes several centuries depending on care¹². In pots, repotting, top-dressing⁵ and root freezing around −6 °C (21 °F)¹¹ are the main deciding factors.

How can I tell if a potted olive needs water?

The most reliable test is a finger: dry soil a third of the way down means watering is needed⁸. Weight helps too. A pot easily lifted the day after hot weather has already used its reserve. If the rootball has dried right through, water stress describes signs and recovery.

Why is my potted olive losing its leaves?

Most often too much water, rather than too little: a constantly damp rootball starves roots of oxygen, so they no longer feed the crown⁷. Next come frost affecting the rootball¹¹, prolonged midsummer drought in the pot, or winter storage too dark for a tree needing full light³.

Does a potted olive need sun?

Yes, in full sun, sheltered from wind, ideally near a south-facing wall in the RHS’s UK growing context³. In shade it grows poorly and flowers little.

Can you keep a potted olive indoors?

Not year-round in a heated home: it lacks full light and the two months at 4 to 10 °C (39 to 50 °F) needed for flowering³⁴. Winter in a conservatory or unheated greenhouse suits it, then it goes outdoors again in spring.