For years I treated cilantro like a disposable item. Buy a bunch on Saturday, use three sprigs for tacos, put the rest back in the fridge still in the produce bag, find it Thursday looking like someone dumped a cup of pond water in the crisper drawer. Throw it out. Repeat next weekend.

Then a friend who used to work in a restaurant kitchen saw my herb graveyard and said, “You are storing it wrong.” I was. Most people are.

The Problem With the Produce Bag Method

Cilantro rots for two reasons: too much moisture and no air circulation. The plastic produce bag traps humidity. The leaves get wet, then they get slimy, then they turn into green sludge. The stems go first because they sit in whatever water collects at the bottom of the bag.

What makes it worse: most grocery stores mist their herbs. So the cilantro is already wet when you buy it. Putting wet herbs in a sealed bag is basically starting the rot before you leave the parking lot.

The Method That Works

1. Do not wash the cilantro yet. Moisture is the enemy. Wash only what you are about to use.
2. Trim the stem ends by about half an inch — just cut off the dried-out bottoms.
3. Fill a glass or small jar with about an inch of water. It should look like a tiny bouquet.
4. Put the cilantro in the jar, stems in water, leaves up.
5. Loosely cover the leaves with a plastic bag — a produce bag is fine for this — but do not seal it. Just drape it. The bag keeps the leaves from drying out while letting air move.
6. Put the jar in the fridge door, not the back. The back of the fridge is colder and cilantro hates the cold.

What Happens

The stems drink water like flowers. The loose bag creates a mini greenhouse — humid enough so the leaves do not wilt, but ventilated enough so they do not rot. Two weeks later the cilantro still looks like you just bought it.

Change the water every three or four days. If any leaves start to yellow, pull them off so they do not speed up the rot on the rest.

This Works For…

• Parsley — exactly the same method, lasts even longer
• Basil — but leave it on the counter, not the fridge. Basil turns black in the cold
• Mint — same as cilantro, fridge door
• Green onions — they will actually keep growing new shoots in the jar

What I Learned the Hard Way

I tried this with basil in the fridge. It turned black overnight and I had to throw out the whole batch. Basil is tropical. It cannot handle temperatures below 50 degrees. Counter only.

I also once covered the jar too tightly with plastic wrap — sealed around the neck with a rubber band. Trying to be clever. Three days later: slime. The bag has to breathe.

This method costs nothing and takes thirty seconds. I now buy cilantro once every two weeks instead of twice a week. At three dollars a bunch, that is about seventy dollars a year saved on an herb I was mostly throwing away.