Why Do Pistachios Split Open?

The growth of pistachios can be compared with growing grapes; they grow in bunches on the tree. When the nut ripens it grows bigger, making the hard shell burst open after some time. These nuts are also called “splits”. There are also pistachio nuts called “non-splits” that do not split.

What causes a pistachio to open?

The shell actually opens on its own during the growth process. As the pistachio nut grows, it expands until it pops its shell open. Sometimes, pistachio shells don't open on their own. Often, this is caused by immature kernels that don't grow properly.

What happens when you eat too many pistachios?

Pistachios have a rich, buttery flavor that can be addicting. ... Since pistachios contain fructans, eating too many of them can cause bloating, nausea or abdominal pain.