Do microgreens regrow? This directory answers it for 26 of 62 crops and says yes to one

Read the regrow field across all 62 variety entries here and the shape of the answer is immediate.

Twenty-six crops have a real answer, and exactly one of them is yes. That is chickpea shoots. Five more are partial: celery, nasturtium, pea shoots, purslane and wheatgrass.

And the largest group by far is the one nobody has settled. For 35 of 62 crops, the honest state of knowledge is that it has not been established either way.

Roots do not make a new shoot

The most repeated error in this subject is "the roots are still there, so it will come back."

Roots take up water. They do not ordinarily produce a replacement shoot. New growth needs a surviving structure capable of making one: a shoot meristem, or a node carrying a bud, above the cut. Failing that, a grass-type crop can regrow from a basal or leaf-base meristem sitting at or near the ground, which is why grasses tolerate mowing and a broadleaf seedling does not.

A normal microgreen harvest removes exactly that structure. The cut takes the shoot tip, the stem, the cotyledons and any emerging true leaves, and leaves roots and a short crowded stump. For a low-cut broadleaf seedling there is usually nothing left that can grow.

Which reframes the whole question. It is not "did I leave roots," it is "did I leave a node." After a cut, the first diagnostic question is whether a healthy node or leaf base survives. If it does not, no amount of watering restores a removed growing point, and the "it needs more water" reflex is answering a question the plant is not asking.

The one documented case is not a microgreen

The clearest published regrowth evidence is pea shoots, and the plants are nothing like a tray of pea microgreens.

Washington State documents clipping the top 2 to 6 inches from plants already 12 to 18 inches tall and 6 to 8 weeks old, leaving the top leaf nodes behind. New vines then develop from those nodes, and the second harvest yields 2 to 3 shoots per plant against one at the first, after about 3 to 4 weeks.

That plant is four to nine times taller and two to eight times older than the crop this page is about. The mechanism it demonstrates is real and it is node-mediated branching, which is precisely the thing a low microgreen cut removes.

Now look at the last row, because it settles the economics. The documented regrowth takes 3 to 4 weeks. The median crop in this directory finishes in about 11.5 days. Waiting for the second cut occupies the tray roughly 1.8 to 2.4 times as long as growing an entire new crop from seed.

So "a free second harvest" is not free. It costs the bench time that a fresh sowing would have used, and the succession page explains why tray-days are the unit that decides this.

The numbers in circulation disagree with each other

No published trial has ever sown microgreen trays, cut them, re-cut the same trays, and reported both harvests by weight. That study does not exist.

What circulates instead is two grower figures that do not agree. One page reports its pea second harvest was 70 to 80 percent lower than the first, which leaves 20 to 30 percent. Another says about half. Those differ by roughly a factor of two, and neither page describes a weighed, repeatable method.

The WSU figure people reach for is not a yield either. It is shoots per plant, a count, and it cannot honestly be converted into a percentage of first-cut mass.

Quality is in the same state. Growers report second growth as more fibrous, tougher, more bitter, sometimes yellow or uneven. No blinded sensory test, no color measurement and no shelf-life comparison of a first against a second cut has been published.

The extension sources genuinely disagree

This is not a case where one side is careless. UF and IFAS say some crops may give one additional small harvest. Mississippi State describes microgreen harvesting as a one-cut process.

Both statements are broad, and neither publishes crop-by-crop measurements, which is exactly why they can differ without either being wrong. The gap between them is the missing trial, not a reason to average two opinions into a compromise.

A related confusion is worth naming. "Cut and come again" is a real system, and it usually describes mature or baby-leaf production where the crown and nodes survive the cut. Salad mix harvested at three to five weeks is a different production system from microgreens cut at two to three weeks as close to the medium as possible. A lettuce that tolerates repeated cutting does not tell you what its cotyledon-stage microgreen will do.

When a source says a crop regrows, ask what age, what height, and which node was left. If it cannot answer, it is mixing systems.

Holding a cut tray is not a food-safety free pass

Between cuts the root mat and stubble stay wet for longer, and that is a real physical change.

Nobody has measured whether it raises risk. No study compares contamination in a first-cut tray against one held for regrowth.

What is established rules out the comforting assumption. A laboratory study found Salmonella, E. coli O157:H7 and Listeria monocytogenes transferring from contaminated seed or soilless substrate into 20 microgreen types, with recovered populations varying by organism and crop. A separate study found pathogens surviving differently across coir, peat and vermiculite, Biostrate and hemp over ten days.

Neither tests a second cut. Together they establish that a moist medium and a root mat are not automatically inert, which is enough to say that a clean-looking held tray is not safety-tested. See cleaning and sanitation.

Do not harvest around visible mold, an off odor or unexplained slime for sale. Discard the tray.

What to actually do

• Look up the crop before you plan a second cut. The regrow field here answers it for 26 of 62, and says yes to one.
• Treat a normal low-cut tray as one harvest. Brassicas, radish, sunflower and mixed trays are one-cut unless your own trial on your own cultivar says otherwise.
• Ask whether a node survived, not whether roots did. That is the question the plant is answering.
• If you want to try it, sacrifice a strip, not the tray. Cut one marked band high enough to leave a visible node and harvest the rest normally, so the experiment costs you a strip rather than a crop.
• Accept that a high cut costs first-cut yield. You are trading saleable product now for an unmeasured product later.
• Compare against a fresh tray sown the same day, not against nothing. This is the control every practice page omits, and it is the only comparison that answers the question.
• Count the tray-days. The one documented regrowth path takes 3 to 4 weeks against a median 11.5 day crop.
• Never sell a second cut on a schedule without your own records of saleable grams per tray-day and a customer who has accepted the uniformity.
• Do not water a tray to make it recover. If the growing point is gone, water is not the missing input.

What nobody has measured

• Second-cut yield as a percentage of the first, for any crop, from a weighed trial.
• Days to a second cut for a standard microgreen tray of any species.
• Any complete re-cut method at all, with seed weight, density, medium, environment, cut height and both harvests reported.
• Quality and shelf life of a second cut against a first, blinded.
• Whether holding a cut tray raises contamination, which needs a first-cut against held-tray comparison with inoculated and natural-background arms.
• Whether mold or damping off increases after a cut.
• Whether peas or legumes really give two or three cuts at microgreen stage, as opposed to on a six-week vine.
• A universal cutting height. "Cut one inch high" is folklore until it names the crop, cultivar, stage and node position.
• Whether it ever pays commercially, which needs saleable grams per tray-day against resowing.

Sources

Opened 2026-08-11. The 62-crop tally was computed for this page from the regrows field across every variety entry here. The comparison between the documented 3 to 4 week regrowth and a fresh sowing uses this site's own median 11.5 day crop, from the daysToHarvest field. The two circulating yield figures are grower reports with no method published, and are presented as disagreeing rather than as a range.

• Washington State University, pea shoots (PDF) - clipping the top 2 to 6 inches from plants already 12 to 18 inches tall and 6 to 8 weeks old, leaving top leaf nodes from which new vines develop, a second harvest of 2 to 3 shoots per plant against one at the first, roughly 3 to 4 weeks to sufficient regrowth, the advice to check flavor and stop if it turns bitter, and shoots described as fragile and best used within 1 to 2 days.
• Oregon State University Forage Information System, regrowth - that documented grass regrowth comes from meristems at or near ground level, leaf-base intercalary meristems and basal buds, rather than from a severed leaf tip.
• University of Maryland Extension, growing microgreens and baby greens indoors - microgreens harvested at 7 to 21 days at cotyledon and emerging true leaf stage, against baby greens at 4 to 6 inches and 21 to 40 days and mature greens over 6 inches at 40 to 60 days.
• Penn State Extension, the ABCs of microgreens - the harvest stage and the cut above the medium.
• Penn State Extension, a step by step guide for growing microgreens at home - harvest treated as a cut near the medium with composting and resowing afterward.
• Iowa State University Extension, how to grow your own microgreens - harvest guidance to cut near the medium, that overwatering can lead to root rots and damping off, and watering from below to avoid wet foliage.
• University of Illinois Extension, growing microgreens (PDF) - harvest as a cut near the medium with a new crop started afterward.
• UF and IFAS Gardening Solutions, microgreens - that some crops may give one additional small harvest, and the standard cut near the medium.
• Mississippi State Extension, microgreens (PDF) - microgreen harvesting described as a one-cut process, which is the direct counterpart to the UF and IFAS position above.
• UMass Vegetable Management Guide, salad mix and microgreens - salad mix harvested at three to five weeks with some varieties regrowing, against microgreens harvested at two to three weeks as close to the soil as possible, and the note that repeat-harvest salad mixes can be less uniform and lower quality.
• Işık, Çetin and Topalcengiz, pathogen transfer to microgreens, 2024 - Salmonella, E. coli O157:H7 and Listeria monocytogenes transferring from contaminated seed or soilless substrate to 20 microgreen types, with recovered populations varying by organism and crop.
• Buehler and colleagues, pathogen survival on cultivation matrices, 2020 - pathogens surviving differently across coco coir, peat and vermiculite, Biostrate and hemp over ten days.
• Penn State Extension, ensuring food safety in microgreens production - that bacteria thrive in the moist warm conditions that also favor microgreen growth, that water, media and tools can introduce contamination, and that microgreens are commonly eaten raw.
• Practice sample, opened 2026-08-11 and used only as a record of what is claimed: On The Grow, the source of the 70 to 80 percent lower pea second yield; Seeds and Grain, the source of the about half figure and of reports of off-color and inconsistency; Home Microgreens, which lists lettuce, peas, cilantro, parsley, onions, leeks and celery as crops it has seen give a second harvest while warning it is slower and smaller, and reports more fibrous and more bitter regrowth; Wagner Greens, with the more modest position that second cuts are smaller, weaker and inconsistent; Biology Insights; Microveggy, the source of the claim that leaving one healthy leaf gives a good chance of regrowth; and Fern and Shelf.