According to The Cold Wire, pistachios are also expensive because of the costs associated with growing them. In addition to the obvious needs (such as enough water and fertile land in the right climate for trees to grow), pistachios require a great deal of labor to harvest them. Pistachio is a difficult plant to grow, and one of the reasons is that it has a very long growth period. From the moment you plant a pistachio tree, it will take 15 to 20 years before you see the first fruits.
Even if you wait 15 years for the tree to produce and work for you, there won't be many pistachios on every tree. The tree will only produce seeds every two years. Committing to a business where plants only produce every two years is quite difficult. Pistachios without shells are less expensive than pistachios with shells.
Because you know that you only pay for grains, not for shells or closed pistachios, which are difficult to open. The first reason pistachios are among the most expensive nuts is that they require special weather conditions to grow. Now, if you remove the skin in addition to the peel, you'll have a peeled green pistachio (GPPK). The shell is the hard, inedible layer of pistachios and must be removed to access the grain.
You're probably starting to understand now why cashew nuts and pistachios are so expensive to use as baking ingredients. It appears that unshelled pistachios have had their skin removed, while they are intact in unshelled pistachios. Workers have to process large heaps of pistachios every day, and it's going to be a process that will require a lot of time and labor. That's what some nutritionists recommend to people who want to lose weight and who need to take care of the amount of pistachios they eat in a day.
However, there are other forms of pistachios on the market, such as closed-mouthed pistachios and “pistachio kernels”. Pistachios without shells tend to have a much shorter lifespan because they have lost their protective shell. Because these conditions are so specific, it should come as no surprise that pistachio can only grow in specific locations in the world. Pistachios need enough hours to grow in sunlight and with low humidity to ensure that their kernels ripen well before picking them.
You'll quickly learn that many of the reasons pistachios are so expensive are going to be related to the way pistachios grow. Workers will need to spend time learning about the pistachios they are sorting and deciding which ones work best for the farmer's profitability. We would be lucky to find a sample of pistachio in which the grain represents 50 percent of the weight of the nut. If you take a naturally split pistachio and open the shell, then you have a pistachio “kernel”.