Puglia’s Monumental Ancient Groves
In the heel of Italy stand some of the oldest cultivated trees on earth: the monumental olives of Puglia, their trunks vast and contorted by a thousand years and more. They are protected as heritage, beloved as landscape, and at the centre of a disease crisis that has made world news.
Puglia is where Italy’s olive story reaches its grandest and its saddest. The long heel of the boot produces a large share of the country’s oil, and among its endless groves stand the ulivi monumentali — ancient trees whose trunks have grown thick, hollow and sculptural over centuries. They are protected by regional law and revered as landscape. And since 2013 they have been at the heart of one of the worst plant-disease crises Europe has seen, a slow catastrophe that turned a picture-postcard region into a warning for the whole Mediterranean.
Trees as monuments
Among Puglia’s endless groves stand the ulivi monumentali, ancient trees whose trunks have grown thick, hollow and sculptural over centuries, many estimated to be hundreds of years old and the eldest plausibly far older still. These giants are protected by regional law, which forbids uprooting or moving them without permission, and they draw visitors who come simply to stand among them. They are working trees too — many still fruit — but above all they are living history, rooted where Greeks and Romans once pressed oil. To walk the old groves is to move among the oldest cultivated living things most of us will ever see.
The Xylella ordeal
That heritage has been gravely tested. From around 2013 the bacterium Xylella fastidiosa, spread by sap-sucking insects, began killing olive trees across the far south of Puglia — the Salento — and millions of trees, including ancient ones, have since died or been felled to slow it. There is no cure; control means destroying infected and nearby trees and replanting with more resistant varieties, a heartbreaking process in groves people regard almost as family. The crisis reshaped the region’s output and became a warning to the whole Mediterranean about plant disease. It sits behind much of what we say about the real cost of oil.
What the crisis really taught
Here is the lesson the postcards leave out. Puglia’s disaster was made worse by monoculture — endless groves of a few old, beloved, genetically similar trees, magnificent but defenceless once the right pathogen arrived. The recovery hinges on replanting with resistant varieties, which means the region’s oil is quietly changing character as it heals. So when you buy Puglian oil now, you are buying from a landscape mid-transformation. Support a grower keeping the tradition alive, by all means — but understand that ‘ancient monumental grove’ is, in part, a story about fragility, not just grandeur. The oldest trees are the most irreplaceable, and the most exposed.
| Where | Puglia, the heel of Italy — a top oil region |
|---|---|
| The monuments | Ulivi monumentali, many centuries old |
| Protection | Regional law forbids uprooting or moving them |
| The threat | Xylella fastidiosa, first detected 2013 in the Salento |
| The toll | Millions of trees dead or felled; no cure |
| The response | Destroy infected trees; replant resistant varieties |
A timeline of Puglia’s groves
| When | What happened |
|---|---|
| Antiquity | Greeks and Romans press oil in the same country |
| Over centuries | Trees grow into the vast, hollow ulivi monumentali |
| Modern era | Puglia becomes Italy’s leading oil region; monoculture spreads |
| 2013 | Xylella fastidiosa detected in olive trees in the Salento |
| Since | Millions of trees die or are felled to slow the spread |
| Now | Replanting with resistant varieties; the region heals slowly |
If you visit or buy
- The monumental groves of the Valle d’Itria and Ostuni are extraordinary to walk through.
- Go respectfully — these are protected, disease-stressed trees, not a backdrop.
- Buy from a grower keeping the tradition alive, ideally at the source.
- Know the region’s oil is changing as it replants — you are tasting a landscape in recovery.
Puglia’s monumental olive groves: common questions
What are the ulivi monumentali?
Puglia’s monumental olive trees — ancient specimens with vast, hollow, sculptural trunks, many hundreds of years old and protected by regional law.
Where are they?
Across Puglia, the heel of Italy, clustering especially in the Valle d’Itria and around Ostuni.
What is Xylella fastidiosa?
A bacterium, spread by sap-sucking insects, that causes olive quick decline syndrome; it was first detected in Puglian olives in 2013 in the Salento.
How many trees have been lost?
Millions have died or been felled to slow the spread. There is no cure, so control means destroying infected and nearby trees and replanting resistant varieties.
Can I still visit the groves?
Yes — several estates welcome visitors and sell oil at the source; go respectfully, as these are protected, disease-stressed trees.
The monumental groves around the Valle d’Itria and the road to Ostuni are extraordinary to walk through, and several estates welcome visitors and sell their oil at the source. Go respectfully — these are protected, disease-stressed trees, not a backdrop — and buy a bottle from a grower keeping the tradition alive. But understand what you are looking at: Puglia’s disaster was worsened by monoculture, endless groves of beloved but defenceless old trees. The region is replanting with resistant varieties, so its oil is quietly changing as it heals. You are tasting a landscape mid-recovery, which is its own kind of privilege.
Drawn from accounts of Puglia’s monumental olives and the Xylella fastidiosa outbreak (first detected in the Salento, 2013).