Cut microgreens last about a week to ten days in the cooler, and most of that depends on the harvest: greens cut dry and cooled quickly keep; greens cut wet, or packed warm, turn slimy in a few days. After that it's cold and a container that protects them without trapping water. Living trays, sold uncut, last longer still. In the example below, an Asheville farm's clamshells passed every test through day 10, and they're dated 7 days from harvest, a 25% margin. Below is what ends microgreens' shelf life, how the package changes it, the study, the date on the label, and a free template.
The short version
- Harvest dry: wet greens turn slimy.
- Cool them right after cutting and keep them at 34 to 38°F.
- Clamshells protect them; don't pack them tight.
- Living trays last longer than cut greens.
- Run a real-time study, refrigerated, and leave a margin.
- Date them from harvest.
- TaroStack gives every batch its date from the shelf life you set. More below.
What ends its shelf life
| What ends it | What happens | What slows it |
|---|---|---|
| Slime | Wet leaves break down in the package | Stop watering a day before harvest; cut dry |
| Wilting | Leaves lose water and go limp | Cool fast; keep cold; a closed clamshell |
| Yellowing | Leaves fade over days | Cold storage; sell within the date |
| Crushing | Packed tight, leaves bruise and rot | Fill loosely by weight |
The clamshells are in how to package microgreens for sale, and the farm's year in microgreens business plan.
How it's stored
| Stored | In the example's tests | On the label |
|---|---|---|
| Closed clamshell, refrigerated at 34 to 38°F | Passed every test through day 10 | Use by 7 days from harvest |
| Harvested wet, clamshell, refrigerated | Slimy by day 4 in a side study | Watering stops a day before harvest |
| Living tray, uncut | Not part of the study | Restaurants cut to order |
The farm harvests in the cool of the morning and has the greens in the cooler within the hour.
An example: a shelf life study
Hilltop Greens, the made-up farm in Asheville, North Carolina, I use in these examples, kept 2-ounce clamshells of a radish and pea mix from one harvest in the cooler and checked two at each pull:
| Test | Pass if | Day 0 | Day 3 | Day 5 | Day 7 | Day 10 | Day 14 |
|---|---|---|---|---|---|---|---|
| Crispness score, 1 to 9 | at least 6 | 9 | 9 | 8 | 7 | 6 | 4 |
| Color score, 1 to 9 | at least 6 | 9 | 9 | 8 | 8 | 7 | 5 |
| Slime or decay, 1 to 5 | at most 1 | 1 | 1 | 1 | 1 | 1 | 3 |
| All pass? | Pass | Pass | Pass | Pass | Pass | Fail |
Everything passed through day 10; at day 14 the greens had gone limp and decay started. Taking a 25% margin off day 10 gives 7 days. How the pulls and margin are planned is in shelf life testing.
The date on the label
Cut microgreens are perishable, so the farm prints "Use by", counted from harvest. In California, food made from July 1, 2026 that shows a date uses "USE by" for a safety date and "BEST if Used by" for quality, in sell by date law. The margins are in microgreens profit margin.
Get the template
Download the microgreens shelf life study template. One sheet: the product, the lot tested, the day it was made, how it's stored and the margin to leave; then each test with its limit and the result at each pull. It marks each pull pass or fail, finds the last day everything passed, takes the margin off, and gives the shelf life for the label and the date for a batch made today. It's an ordinary Excel file with no macros, and it works in Google Sheets, LibreOffice and Numbers.
Where this stops working
The study gives one date for one mix. Six varieties, harvests every other day, clamshells at markets and a grocer, bags to restaurants: someone has to date each harvest and send the oldest clamshells first.
How TaroStack does it
TaroStack gives every batch its date from the shelf life you set, and sends the oldest out first.
Dates from the shelf life. Each microgreen carries its shelf life in days, and each batch's lot gets its production date and the date that follows from it.
First-expired-first-out. Orders take the oldest lots first by default, and a grocer can be set to take only stock with enough days left.
What's coming up. A forecast shows what will expire unsold and what it costs, and anything thrown out is recorded with its reason, expired or spoiled, so waste shows by item.
| The job | Spreadsheet | In TaroStack |
|---|---|---|
| The date on a batch | Worked out by hand | From the shelf life, on the lot |
| Which batch goes out first | Dates on tape | First-expired-first-out |
| Stock with enough days for a grocer | Checked by hand | The customer's shelf-life rule |
| What expired last month | Not counted | Waste by reason |
Lots, dates, first-expired-first-out and the expiry forecast are on every plan, from $49 a month. The first 30 days are free, with no credit card. If you'd like a hand setting up, ask, and we'll do it with you.