Growing
How long does a pistachio tree take to bear, and what does it yield?
Seven years. That is how long it took us from planting to the first harvest. Here is what happens during those years, and what an orchard produces afterwards, based on Spanish records and French projections.
A pistachio tree will not be hurried. That is the first thing to accept before planting, and the hardest to fit into a financial plan: for years, the orchard costs money and brings nothing in. The question is how many years, and what comes after.
How long does it take a pistachio tree to produce nuts?
| Source | First harvest |
|---|---|
| Pistache en Provence association | from the 5th year |
| Chambre d’agriculture de Vaucluse and INRAE | 5 to 7 years |
| France Pistache growers’ union | 6 years |
| Spain (CIAG-IRIAF) | around 7 years |
| California (University of California) | 6 to 7 years |
These timescales apply to grafted trees. A pistachio grown from seed takes longer, and it may just as well turn out male as female: if it is male, it will never bear fruit. Grafting saves two to three years, which is one of the reasons pistachio trees are always grafted.
What happens during those years?
- Years 1 to 3: getting established. The tree puts down roots. Irrigation is essential. It is trained as an open-centre vase on three main scaffold branches, with 80 to 90 cm of clear trunk so that a trunk shaker can grip it one day.
- Years 4 and 5: the first clusters. A few hundred grams per tree. Enough to taste, not enough to sell.
- Years 6 to 8: the first real harvest. The French industry hopes for 1.5 t per hectare from the eighth year.
- Around 10 years: full production, according to France Pistache.
- 15 to 20 years: the plateau. This is the age at which Spanish orchards reach their maximum output.
What is the yield per tree and per hectare?
The only year-by-year records we know of come from Castilla-La Mancha, on the Kerman variety. Note that they are counted in years after grafting, not after planting.
| Years after grafting | Rain-fed | Irrigated with 3,000 m³/ha |
|---|---|---|
| 4 | 0.2 kg per tree | not recorded |
| 8 | about 1,000 kg/ha | 6.1 kg per tree, or 1,500 kg/ha |
| 10 | 5.5 kg per tree | not recorded |
| 14 to 20 | 6.8 kg per tree, or 1,441 kg/ha | 11 to 12 kg per tree, or 2,500 kg/ha |
In France, no measured yield has been published yet. The figures going around are projections:
- 1.5 t per hectare of dry in-shell nuts, or about 800 kg of kernels, according to the Chambre d’agriculture de Vaucluse and France Pistache, which calls it a conservative assumption;
- 1 t per hectare for 300 trees, a figure quoted by the growers’ union in 2025;
- 15 to 20 kg per tree, claimed by one nursery. That is well above the plateau recorded under irrigation in Spain: treat it as a sales pitch until a French orchard has actually measured it.
Water accounts for most of the gap between these figures, as the table shows. We come back to it in the article on climate, soil and water.
Why doesn’t a pistachio tree produce the same amount every year?
Because it shows alternate bearing, more than most fruit trees. In heavy-crop years, the tree feeds its nuts at the expense of its flower buds: from late June to August, it sheds them. The following year, it has almost nothing left to flower.
The scale of it shows in a Spanish record from a rain-fed orchard: 2,077 kg per hectare in the twelfth year, 508 kg in the thirteenth. Four times less, from the same trees.
Three ways to live with it:
- water: this is why France Pistache argues for 1,500 m³ per hectare, less to produce more than to produce more evenly;
- think in two-year terms: a pistachio yield is judged as an average over a cycle, never on a single harvest;
- accept it: in Bronte, in Sicily, they only harvest every other year, in odd-numbered years.
How long does a pistachio tree live?
A long time. Californian orchards are expected to last 70 to 100 years, and the Pistache en Provence association gives 150 to 300 years for the tree itself. Spanish advisers plan a renewal pruning at around 20 or 30 years. It is an orchard you plant to hand on: the wait at the start pays off over several generations.
Frequently asked questions
How many pistachios does one tree produce?
Once mature, 5 to 12 kg of dry in-shell pistachios a year, depending on how much water it gets: about 7 kg in a rain-fed orchard, 11 to 12 kg with full irrigation. In the first years of production, only a few hundred grams.
Do pistachio trees grow fast?
No. They take five to seven years to give a first harvest, around ten years to reach full production, and fifteen to twenty years to reach their full yield.
Do pistachio trees produce every year?
Yes, but very unevenly. A heavy crop year is followed by a light one, sometimes four times smaller. Irrigation softens this alternate bearing without eliminating it.
What is the yield of a hectare of pistachio trees?
In a mature orchard, from 1 t of dry in-shell pistachios per hectare without irrigation to 2.5 t with 3,000 m³ of water, according to Spanish records. In France, the industry works on an assumption of 1.5 t per hectare.
How many shelled pistachios do you get from a kilo in the shell?
Just over half: the French industry counts 800 kg of kernels for 1.5 t of in-shell pistachios, or 53%.
Sources
- El pistacho (1): requirements, soil, water and year-by-year yields, J. F. Couceiro, IRIAF El Chaparrillo, in Spanish.
- Pruning the pistachio tree, CIAG-IRIAF, Vida Rural magazine, 2025, in Spanish.
- Le pistachier, Pistache en Provence association, in French.
- Café Agro « Fruits à coque », Chambre d’agriculture de Vaucluse and INRAE, 2021, in French.
- Mechanisms of alternate bearing in pistachio, Benny et al., Genes journal, 2020.
- Pistachios: production fact sheet, UC Davis, Western Institute for Food Safety and Security.
- La pistache française sur toutes les lèvres, mais pas encore en bouche, Pleinchamp, 26 April 2024, in French.
- La pistache, le futur or vert de la Provence, L’Écho du Mardi, 14 April 2025, in French.
- La pistache récoltée en amandon vert, Pleinchamp, 13 October 2026, in French.
- La pistache, une jeune filière pleine de promesses, Terre-net, 9 June 2025, in French.
- Il pistacchio di Bronte, Il Post, 27 December 2024, in Italian.
