An English olive…. but don’t mix the Martinis just yet
Olive trees now sell briskly in British garden centres, and a mild year can even coax out a few fruits. But before you plan the harvest, it is worth being clear-eyed about what a cool, damp climate can and cannot do for an olive.
Walk around a British garden centre and you will see them: neat potted olive trees, sold as a slice of the Mediterranean for the patio. Warmer springs and a run of mild winters have made them fashionable, and every so often the newspapers announce that Britain is growing its own olives. The tree will indeed often survive. Whether it will ever give you a bowl of olives is a very different question.
Surviving is not fruiting
An olive tree is tougher than it looks and will endure a mild British winter, especially in the milder south and west or in a sheltered city garden. But surviving and cropping are worlds apart. To set and ripen fruit an olive needs a long, hot, sunny summer — months of real Mediterranean warmth — and it needs a cool (not freezing) winter spell to trigger flowering. A cool British summer gives too little heat to ripen what few fruits form, so most garden olives flower shyly, fruit rarely, and ripen almost never.
The real enemy is wet, not cold
Here is the part the cheerful garden-centre story leaves out. Olives are built for hot, dry, poor ground, and their great weakness in Britain is not so much the cold as the wet. Waterlogged winter roots and constant damp do far more harm than a crisp frost, inviting rot and disease a Mediterranean tree never evolved to face. That is why a pot often works better than open ground: you control the drainage, you can shelter it from the worst wet, and you can move it against a warm wall or under cover when the weather turns. Sharp drainage matters more than a heat wave.
Enjoy the tree for what it is
None of this is a reason not to grow one — just a reason to grow it for the right thing. As a handsome, silvery, drought-tolerant evergreen for a pot or a sunny corner, an olive is a lovely and genuinely long-lived plant; some Mediterranean specimens are ancient beyond belief, as we describe in the oldest olive tree in the world. Treat any British fruit as a happy surprise in a good year, not the point of the exercise. Grow it for the leaves, the shape and the Mediterranean mood, and you will never be disappointed.
| Factor | In its Mediterranean home | In a British garden |
|---|---|---|
| Winter | Cool but rarely freezing | Milder now, but wetter |
| Summer heat | Long and hot, ripens fruit | Often too cool to ripen |
| Main risk | Drought (which it likes) | Waterlogging and damp |
| Best grown as | A productive fruit tree | A handsome ornamental |
| A crop | Reliable | A rare, lucky bonus |
If you grow one in a cool climate
- Expect an ornamental, not an orchard — fruiting is rare and unreliable.
- Fear the wet more than the cold: sharp drainage is everything.
- Use a pot so you can shelter it and control the soil.
- Give it the sunniest, warmest spot you have, against a wall if possible.
Growing olive trees in cool climates: common questions
Can olive trees grow in Britain?
Yes, as ornamentals. They will often survive milder British winters, especially in the south and west, but reliably ripening fruit is another matter.
Why doesn’t my olive tree fruit?
Most likely too little summer heat. Olives need a long, hot summer to set and ripen fruit; a cool northern summer rarely provides enough, so fruiting is sporadic at best.
What is the biggest danger to an olive tree in a wet climate?
Waterlogging and constant damp. Olives are adapted to hot, dry, poor soils, and wet winter roots cause rot and disease more readily than a light frost does.
Should I grow my olive in a pot or the ground?
A pot is often better in a cool, wet climate. It lets you control drainage, shelter the tree from the worst weather, and move it to the warmest, sunniest spot.
Is it still worth having an olive tree if it won’t fruit?
Absolutely — as a silvery, drought-tolerant, long-lived evergreen it is a beautiful ornamental. Just treat any fruit in a good year as a bonus rather than the goal.
I love that people want to grow olives far from the Mediterranean, but I hate to see them disappointed, so here is the straight version : in a cool, damp climate you are growing an ornamental, and the odd fruit in a hot year is a bonus, not a harvest. And the thing that kills these trees is almost never a frost — it is wet feet. Plant it in sharp-draining soil or, better, a pot you can move and shelter, give it your sunniest wall, and enjoy the silver leaves and the shape. Want an actual crop? That still comes from where the summers are long and hot.
An original olives101 note on growing olive trees in cool climates.