How to choose the best:
Leek

Touch

Look for stalks that are firm and crisp, rather than leathery or bending.

See

Look for leeks with as big a white section as you can — the greens aren’t really edible anyways.

Watch out for leeks that look to be yellowing towards the top.

Some more details:

How to clean

Proceed carefully here: leeks are usually filthy!

One good way to clean your leeks: slice them vertically through the core, and carefully run the layers under running water, allowing the grit to come out with it.

How to store

Unlike many other aromatics, leeks need to be stored in the fridge. They do best in a humid environment, so try wrapping in a moist cloth or paper towel before storing in a plastic bag.

When it's in season

Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec.