How to Store Microgreens So They Stay Fresh

Microgreens are cut while they are still growing hard, so they keep breathing after harvest and use up their own reserves. Everything about storing them comes down to slowing that down without bruising or wetting the leaves. Get three things right — cold, dry, and left alone until you eat them — and a punnet stays crisp for days rather than hours.

Temperature matters most

Research on stored microgreens keeps returning to the same finding: temperature has a bigger effect on shelf life than anything else. In a 2023 study of packaged mustard microgreens published in the journal Life, samples held at 5°C kept good quality for 14 days, while those at 10°C lasted about 4 days and those at 15°C about 2. Above 20°C they spoiled within a day. Other species behave differently, but the direction is the same.

In practice, that means the main shelf of the fridge rather than the door, which warms up every time it opens, and never on the counter. In Thai heat, a punnet left out for an afternoon loses more than a day in the fridge would take.

Keep them dry

Water on the leaves is what turns microgreens slimy. Leave them in the container they came in. If there is condensation on the lid, tuck a dry paper towel inside to take it up, and replace it if it gets damp.

Do not wash them until you eat them

Washing before storing is the most common mistake. Wet, bruised leaves break down within a day. Washing does not buy you safety either: University of Maryland work on radish microgreens found that a chlorine wash reduced bacteria at first, but counts climbed back to their unwashed levels within about a week. If you want to rinse, do it just before eating, in cold water, and dry the leaves in a salad spinner or on a towel. Our guide to eating microgreens raw explains why greens cut above the medium are fine to eat as they are.

Storing sunflower microgreens — box or bag?

Sunflower shoots are the most common microgreen in Thailand, and the most common question is whether to keep them in a plastic bag. A rigid box is better. A bag presses the shoots together, bruises the leaves and traps moisture against them. If a bag is all you have, leave air in it rather than squeezing it flat, add a dry paper towel, and lay it flat on a shelf where nothing sits on top. Pull off any loose black hulls before storing; they hold moisture.

How long do they last?

Stored this way, our microgreens stay crisp for four to five days. Eaten sooner they are better. Sturdier shoots like sunflower and water spinach hold up a little longer than fine, leafy ones.

• Fresh — upright stems, firm leaves, a clean green smell.
• Tired but fine — slightly limp stems. A ten-minute soak in ice water brings most of the crunch back; dry them well afterwards.
• Finished — slimy or darkened leaves, a sour or musty smell, or any fuzz. Throw them out.

Can you freeze microgreens?

Not usefully. Freezing ruptures the cells of a leaf this tender, so they thaw limp and watery. If you have more than you can eat raw, cook them instead: sunflower and water spinach shoots take a fast stir-fry well. Try our garlic stir-fried sunflower microgreens or stir-fried water spinach microgreens.

Buy what you will use

The simplest storage advice is to buy smaller amounts more often. We cut to order rather than harvest in advance, so a punnet from our shop starts its time in your fridge as close to harvest as we can make it.