You have watched your tray go from bare soil to a dense, green canopy — and now the question is when and how to cut. Harvest too early and you miss peak flavour and nutrition; leave it too long and the stems toughen, the leaves become bitter, and the window closes quickly. Knowing how to harvest microgreens correctly is one of those skills that takes only a few minutes to learn but makes a meaningful difference to every meal you use them in. This guide covers the full process: reading the signs that your crop is ready, cutting cleanly without bruising, handling hygiene, what happens if you try to get a second cut, and how to store your harvest so it stays crisp and fresh for as long as possible.
Understanding What Microgreens Actually Are
Before diving into technique, it helps to be clear on what stage of growth you are harvesting. Microgreens are young seedlings cut and eaten after the cotyledons — the seed leaves — have emerged and fully opened, but usually before the first set of true leaves has fully developed. If you are new to the idea, the overview of what microgreens are on this site explains where they sit in the plant’s life cycle and why that particular window produces such concentrated flavour.
The cotyledons are the nutrient-packed leaves the seed carries within itself — they fuel the seedling’s early growth and are harvested at their most vibrant. True leaves, which come next, are the first leaves the plant produces through photosynthesis and look quite different from the rounded, often symmetrical cotyledons. For most varieties, the sweet spot is just after the cotyledons have opened and straightened, while the first true leaves are either absent or just beginning to emerge.
Cotyledon Stage vs First True Leaves: Which Is Right?
The single most common harvesting question is whether to cut at the cotyledon stage or wait for the first true leaves. The answer depends on the variety — and getting it right is the difference between peak flavour and something edible but past its best.
Harvest at the Cotyledon Stage
The majority of popular microgreen varieties are best harvested as soon as the cotyledons are fully open, upright, and a deep, even green. At this point the stem is tender, the leaves are at their most nutrient-dense, and the flavour is bright and fresh. This applies to most brassicas — broccoli microgreens and radish microgreens are textbook examples — as well as arugula, mustard, and most herbs.
A useful visual check: look at the colour of the underside of the leaves. If any yellow or pale colouring remains, leave the tray for another day. Once the entire canopy is uniformly green and the cotyledons are fully spread, the crop is ready. This typically happens between seven and fourteen days from sowing, depending on the variety, temperature, and light levels.
Varieties That Benefit from Waiting for True Leaves
Some varieties are actually better — or more practical to harvest — once the first true leaves are present. Sunflower microgreens are a good example: the cotyledons are thick and satisfying at the cotyledon stage, but many growers find the first true leaves add a pleasant nuttiness worth waiting for. Peas are similar — their tendrils and first leaves add both visual appeal and a sweeter flavour compared to the cotyledon-only stage.
Coriander (cilantro elsewhere, but it is coriander here) is a slower variety where harvesting at the first true leaf stage is standard because the cotyledons alone lack the characteristic flavour that develops once the first true leaves appear. As a general rule: if the cotyledons taste of what you expected, cut now; if they seem bland or grassy, give the tray another two or three days.
Signs You Have Waited Too Long
Microgreens give clear signals when they are past their prime. The stems begin to elongate and lean, the cotyledons start to pale or yellow at the edges, and the flavour turns from bright to sharp or bitter. Some varieties — particularly mustard and arugula microgreens — move through their window quickly, so check daily once you are within a couple of days of your expected harvest date.
How to Cut Microgreens: Tools and Technique
Clean cutting is not just about aesthetics — a ragged cut damages cell walls, accelerates oxidation, and shortens shelf life. Taking thirty seconds to prepare the right tool makes a noticeable difference.
Choosing Your Cutting Tool
Sharp scissors are the go-to for most home growers. Dedicated kitchen scissors or small herb scissors work well. The key word is sharp — blunt blades crush rather than cut, leaving frayed ends that deteriorate quickly. If your scissors feel like they are pulling rather than slicing through the stems, they are too blunt.
A sharp chef’s knife or santoku works particularly well for large trays where you want to cut across a wide area quickly. Hold the blade at a slight angle and use a single, smooth forward motion rather than a sawing action. Avoid pressing down and then pulling back across the same line — this bruises the stems.
A bread knife (serrated) is sometimes recommended for thick-stemmed varieties like sunflower, where a smooth blade might slip on the round stems. Use a gentle sawing motion with minimal downward pressure.
The Correct Cutting Height
Cut approximately 1–2 cm (about half an inch) above the growing medium. This keeps soil and growing medium off your greens while leaving as much stem as possible — the stem carries flavour and gives the greens structure on the plate. Cutting too close to the soil risks contaminating your harvest; cutting too high wastes edible stem.
If you are growing in soil, hold the canopy gently with your non-cutting hand as you work across the tray so the greens fall to one side and do not end up tangled in the roots. If you are growing hydroponically on a coconut coir or jute mat, the cut point is easier to control because the surface is more uniform.
Working Across the Tray
Work in sections from one end to the other rather than reaching into the middle of the tray. This gives you control over where the cut greens fall and prevents them from being compressed or crushed by your hand as you move. For a standard 10×20 tray, three or four passes with scissors is usually sufficient. Collect the greens into a bowl as you go — do not let them pile up in the tray where the weight and warmth will start to wilt the lower layers.
Harvesting Hygiene: Keeping Your Greens Safe
Microgreens are eaten fresh and usually uncooked, which means basic hygiene at harvest time matters more than with produce you will cook. None of this is complicated, but it is worth being deliberate about.
- Wash your hands before handling the tray or the cut greens.
- Clean your scissors or knife with hot soapy water before use, and again between different varieties if you are harvesting multiple trays in one session. A quick wipe with a clean cloth dampened with white vinegar is a practical alternative.
- Use a clean bowl or tray to collect the cut greens — not the container you used to carry the growing medium or the one sitting unwashed in the sink.
- Avoid overhead watering in the days immediately before harvest. Wet foliage invites mould, and soil splashed onto leaves during watering is harder to remove after cutting. Bottom-watering throughout the growing cycle — especially in the final few days — is the cleaner approach.
- Harvest before any visible mould appears. Damping off or surface mould on the growing medium does not necessarily mean the greens above are affected, but it is a sign to cut promptly and inspect carefully before eating.
Do Microgreens Regrow After Cutting?
This is one of the most frequently asked questions from new growers, and the honest answer is: for most varieties, no — not in any way that is worth waiting for.
Microgreens are harvested at a very early stage of development. The plant has not yet built up the root reserves or photosynthetic capacity to push a meaningful second flush of growth after its above-ground portion has been removed. A few varieties — peas and sunflowers are the most commonly cited — can occasionally produce a sparse second growth from lateral buds, but the yield is significantly smaller and the quality noticeably lower than the first harvest.
This is one of the fundamental differences between microgreens and cut-and-come-again crops like lettuce or herbs. It is also a key point of distinction if you have been reading about microgreens versus sprouts — sprouts are harvested and consumed whole, roots and all, while microgreens are a single-cut crop grown in a medium.
The most reliable and rewarding approach is to compost the spent tray and start a fresh batch. Because growing microgreens from seed to harvest takes only one to three weeks, a succession-sowing system — starting a new tray every week or two — gives you a near-continuous supply without any need to coax a second cut from exhausted roots.
Washing and Drying Your Harvest
Whether or not to wash your microgreens before storage depends on how cleanly you have harvested them. If you cut well above the growing medium and there is no visible soil on the greens, you can skip washing entirely — moisture is the single biggest threat to shelf life, and unnecessary washing introduces that moisture.
When to Wash
Wash if there is visible soil on the cut ends or leaves, if you have been bottom-watering and some medium has splashed during earlier watering sessions, or if you simply want the reassurance of a rinse before storage. Use cool or cold water — never warm — as warmth accelerates wilting. Place the greens in a colander and rinse gently; do not rub or squeeze.
Drying Thoroughly
This step is non-negotiable if you wash. Damp microgreens stored in a container will begin to deteriorate within 24–48 hours. Options for drying:
- Salad spinner: the quickest and most effective method. Two or three spins remove the majority of surface water.
- Clean kitchen towel or paper towels: spread the greens in a single layer and pat gently. Do not press hard or you will bruise the leaves.
- Air drying on a clean rack: effective but slow; only practical if you are not in a hurry to refrigerate.
After drying, give the greens a final visual check. Any yellow or slimy sections should be removed before storage.
Storing Microgreens for Maximum Shelf Life
Correct storage extends the life of your harvest significantly. The enemies of freshness are moisture, warmth, and ethylene gas produced by ripening fruit — keep microgreens away from all three.
The Container
An airtight container with a lid is ideal — a glass or BPA-free plastic container with a fitted lid works well. Line the base of the container with a dry paper towel, which absorbs any residual moisture that accumulates. Lay the microgreens on top loosely without packing them down, then place another sheet of paper towel over the top before sealing.
Avoid zip-lock bags unless you are consuming the greens within a day or two. Bags compress the greens and make it difficult to check for moisture without disturbing the whole batch.
Temperature
Store microgreens in the coldest part of your refrigerator — typically the middle shelf or the dedicated salad drawer — at between 2°C and 4°C (36–39°F). Avoid the door, which experiences the most temperature fluctuation, and keep them well away from fruit, particularly apples and bananas, which release ethylene gas that accelerates spoilage in leafy greens.
How Long They Last
Properly stored microgreens typically last five to ten days in the refrigerator, though there is meaningful variation by variety:
- Robust varieties (sunflower, peas, wheat grass): up to ten days, sometimes a little longer.
- Mid-range varieties (broccoli, radish, kale): five to seven days with good storage conditions.
- Delicate varieties (basil, amaranth, coriander): three to five days before significant quality loss. These are best grown and eaten quickly rather than stored.
Check the container daily and remove any leaves that are beginning to yellow or wilt, as they will accelerate the deterioration of the surrounding greens.
Harvesting on the Tray vs Pre-Harvesting
If you know you will use your microgreens over several days, you have a choice: harvest everything at once and store it cut, or leave the tray intact and cut small amounts each day. Both approaches work, but leaving the tray intact is generally better for freshness — the living plant maintains its own quality longer than cut greens. The trade-off is that the tray continues to grow and will pass its optimal harvest window if left too long.
A practical middle ground: harvest half the tray immediately, store it, and cut the remaining half two or three days later. This works particularly well for slow-growing varieties like peas or sunflowers where the harvest window is broader.
Variety-Specific Harvesting Notes
Most of the guidance above applies universally, but a few popular varieties have characteristics worth knowing before you cut.
Broccoli
One of the fastest and most forgiving varieties. Broccoli microgreens are ready at around seven to ten days and have a wide harvest window — they hold their quality well for several days after the cotyledons have opened. Cut at the cotyledon stage for the mildest flavour; if left a day or two longer, a pleasant brassica bite develops.
Radish
Radish moves quickly and has a narrower window than broccoli. Once the cotyledons are open and green, harvest within one to two days — left much longer, the peppery heat intensifies to the point of being unpleasant, and the stems become stringy. Check radish trays daily from around day six or seven.
Sunflower
Sunflower seedlings often push the hull (seed coat) up on their cotyledons, which can cling on stubbornly. A gentle misting of the canopy the evening before harvest helps soften the hulls so they fall off more easily. Harvest sunflowers when the cotyledons are open and the first true leaves are just beginning to show — this typically takes ten to fourteen days and gives the best balance of yield and flavour.
Arugula and Cress
Both are tiny-leaved and cut most effectively with sharp, fine-tipped scissors. Their harvest window is narrow — they bolt and turn bitter quickly. Cut at the cotyledon stage, around five to eight days, and use within three to four days of harvest.
Coriander
The slowest of the commonly grown varieties, often taking fourteen to twenty-one days. The cotyledon stage alone lacks the characteristic coriander flavour; wait until the first true leaves are clearly visible before cutting. The flavour is far superior at this stage and worth the extra patience.
Frequently Asked Questions
Do Microgreens Regrow After Cutting?
Most microgreens do not regrow usefully after a single cut. Because you harvest at the cotyledon or early true-leaf stage, the plant has not yet developed enough root mass or stored energy to push a second flush. A few varieties — peas and sunflowers occasionally produce a sparse second growth — but the quality and yield are significantly lower than the first harvest. The most reliable approach is to compost the spent tray and start a fresh batch.
When Is the Best Time of Day to Harvest Microgreens?
Early morning is ideal, before your grow lights have been on for several hours. Microgreens that have not been under intense light or warmth for long will have higher turgor pressure — they are crisper and more hydrated at this point. If you are growing on a windowsill, cut before direct sunlight hits the tray. Harvesting first thing also means you can refrigerate the greens quickly while they are at their freshest.
Why Are My Harvested Microgreens Turning Yellow?
Yellowing after harvest usually has one of three causes: harvesting too early before chlorophyll has fully developed; storing in a sealed bag where moisture builds up and accelerates breakdown; or cutting into the soil line and including the pale, etiolated lower stem. Harvest at the right stage, dry thoroughly before storing, and cut just above the growing medium. Yellowing during growth is usually a sign of insufficient light rather than a harvesting issue.
Should I Wash Microgreens Before Storing Them?
Wash only if there is visible soil on the cut greens. If you have harvested cleanly above the growing medium, you can skip washing and simply dry-store the greens — moisture is the main enemy of shelf life. If you do wash them, use cool water, handle gently, and spin or pat completely dry before placing in a container. Storing damp microgreens will cause them to deteriorate within a day or two.
How Long Do Harvested Microgreens Last in the Fridge?
Properly stored microgreens typically last five to ten days in the refrigerator, though this varies by variety. Robust types like sunflower and peas hold up well at the longer end; delicate varieties like basil and amaranth are best used within three to five days. Store them dry, in an airtight container lined with a paper towel, at between 2°C and 4°C (36–39°F), and check daily for any signs of moisture or wilting.
Summary
Harvesting microgreens is straightforward once you know the signals to look for. The right moment is when the cotyledons are fully open, upright, and an even, deep green — for most varieties this falls between seven and fourteen days from sowing. Cut cleanly 1–2 cm above the growing medium with sharp scissors or a knife, collect the greens gently, and prioritise dryness at every stage from harvest to storage. Almost all varieties are single-cut crops, so plan a succession-sowing schedule to maintain a continuous supply rather than trying to coax regrowth from a spent tray. Stored correctly in an airtight container at 2–4°C (36–39°F), most varieties will stay fresh and crisp for up to a week, making it easy to have a supply of fresh microgreens ready to add to dishes throughout the week. If you are still building out your growing setup, the guide to the best microgreens to grow is a good place to start planning your next tray.