Pistachios are domestically grown in the united states, but originated in iran, turkey, syria, greece, and italy. Ninety-eight percent of all pistachios are grown in the united states are grown in california. There are a good deal of plantations in arizona and new mexico, but the majority are grown in california.
These nuts are grown on trees. The shells are tan and the kernels inside are a greenish color which comes from chlorophyll. They are sold with partly open shells that occur for the duration of the growth procedure. The kernels are peeking out, making it easy to open the shell to extract the nut. The shell really opens on its own for the duration of the growth procedure. For the duration of the growth phase the kernel expands until it pops the shell open. Immature kernels never pop the shell and are discarded by growers for commercial sale.
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