When does the olive harvest begin?

Short answer: the olive harvest in Turkey begins in late September and runs into February. But there is no single date: three things decide it — the variety, what you are harvesting for, and the region.

Harvest calendar by variety

Ripening and harvest times recorded on our variety pages:

| Variety | Timing | Used for |

|---|---|---|

| Erkence | earliest | oil |

| Uslu | early October | oil, black table |

| Domat | September-November, ripe mid-October | table |

| Ayvalık (Edremit) | October-November | oil, cracked and black table |

| Gemlik | November-January, ripe mid to late October | black table, oil |

| Memecik | mid-November to mid-December | oil, table |

The spread reaches three months. Erkence is named for its early ripening; Memecik can hang on the tree into mid-December. Two varieties in one grove mean two separate harvests.

Table olives or oil?

Even the same variety is picked at different times depending on its purpose. Mission is the clearest example:

• Table harvest: late October to November
• Oil harvest: mid-December to February

More than two months apart. The reason is simple: table olives must stay firm so they do not break down in brine, while oil olives need to ripen and fill with oil.

The general rule runs like this:

• Green table olives are picked earliest. The fruit is still firm, green and bitter.
• Oil olives are picked at colour change, when oil content has risen but the fruit is not overripe.
• Black table olives are left longest, until the fruit is fully black and softened.

Early or late: the yield-quality trade

Harvest date goes straight to the bottom line, and there is a trade-off:

• Early harvest means the fruit has not filled with oil. The same weight of olives gives less oil, so yield is low. In exchange the oil is higher in polyphenols and aroma and lower in acidity.
• Late harvest raises yield; the same tree gives more oil. But as the fruit ripens the oil loses its bitter, peppery character and its shelf life shortens.

Early harvest gives less but better oil; late harvest gives more but more ordinary oil. For the numbers behind this calculation: Early harvest: expensive or valuable?

How to read colour change

Looking at the fruit beats following a calendar. Ripening proceeds in this order:

1. Dark green — growth incomplete, oil content low

2. Yellow-green — growth finished, oil beginning to fill

3. Spotted — purple flecks on the skin; a common point for oil harvest

4. Purple-black skin, green flesh — oil content close to its peak

5. Fully black, soft flesh — suitable for black table olives; oil quality starts to fall

Cutting open a few fruits taken at random from several trees tells you more than any date.

Regional difference

The same variety ripens earlier in the south and later in the north and at altitude. A harvest that starts in early October on the Mediterranean coast reaches November inland in Marmara. Every 100 metres of elevation delays ripening by several days.

So "in our village the harvest starts on 15 November" may not hold in the neighbouring province. For regional production and variety distribution: Where do olives grow in Turkey?

The cost of harvesting late

Delay carries three concrete risks:

• Fruit drop. Overripe fruit loses its grip and falls. Olives gathered from the ground have been in contact with soil and give oil with higher acidity.
• Olive fruit fly. Damage increases as autumn advances; the larvae feed inside the fruit.
• Rain. A wet harvest is both harder and leaves the fruit open to rot.

The clock keeps running after picking: olives left waiting ferment and acidity rises.

Harvest method affects timing too

Hand picking can be staged; the grove is walked several times and ripe fruit taken. Mechanical and pole harvesting take everything at once, which makes the date more critical — too early and the fruit will not release, too late and it drops.

Variety details are compiled from the measurements recorded on our variety pages.