Harvest timing, yield and regrowth: what the research shows about microgreens
The Microgreens World research database holds 470+ papers on harvest and yield. Here is what happened when researchers cut the same crops on different days, sowed them thick or thin, and tried for a second cut.
The short answer
- A few more days can pay. Broccoli cut on day 13 and radish cut on day 10 yielded 20% more than earlier cuts, and kept better in the fridge. Ortiz 2024
- Cutting early can still win over a year. Red cabbage cut two days sooner gave 16.5% less per tray, but the extra cycles added up to 27% more per year. Yañez Medelo 2025
- Older plants often carry more antioxidants, but not always. Rocket gained pigments and phenolics from day 7 to day 19. In broccoli and radish, harvest day made no difference to glucosinolates or phenolics. Dereje 2026 Ortiz 2024
- Sowing thicker raises yield per tray, by up to about 50% in some crops. It can lower minerals and vitamin C per gram, though. Lima 2026 Cecílio Filho 2025
- Most microgreens are a one-cut crop. The one regrowth trial we found was on beans, which gave two or three cuts from one tray. Kaigorodova 2024
What happens when you harvest on different days?
Short version: a few days can change yield per tray by about 15 to 20%. Whether cutting sooner or later wins depends on whether you count per tray or per year.
Here’s what happened when researchers cut the same crop on different days.
| Crops | Days compared | What they found | Source |
|---|---|---|---|
| Broccoli, radish | Several days after the first true leaf showed | Broccoli on day 13 and radish on day 10 gave the top yield and chlorophyll, 20% above earlier cuts. The same trays showed less decay in the fridge at 4 °C. | Ortiz 2024 |
| Red cabbage | 4 vs 6 days under light | The earlier cut lowered yield per tray by 16.5%. Over a year, the extra cycles gave 27% more. | Yañez Medelo 2025 |
| Cress, rocket | Day 7 to day 19 | Harvest day changed height, leaf area and weight. Rocket cut later gained pigments, phenolics and antioxidant activity and carried fewer microbes. But the older plants looked worse. | Dereje 2026 |
| Chia | 5 to 9 days after sowing | Days 6 to 9 gave the highest fresh weight. | Junpatiw 2019 |
| Rapini, kale, cress | 11 vs 14 days after sowing | The longer cycle grew two rapini types 25% and 44% taller. | Signore 2024 |
Are microgreens more nutritious at the cotyledon or true leaf stage?
It depends on the crop and on what you measure. Some compounds rise with age, some stay flat, and a few drop.
- Phenolics often rise. Moving from the cotyledon stage to about 1.5 true leaves raised phenolics by 57.8% in dill and 29.6% in chia. Red beet changed the most of the five crops Barut Gök 2024.
- Amaranth kept climbing. From day 7 to day 14, height, dry weight, chlorophyll, phenolics and antioxidant activity all went up in both cultivars tested Hongthongk 2026.
- Basil rose slowly. Phenolics went from 0.96 to 1.06 mg per gram of extract between day 10 and day 14, and reached 1.17 in 30-day plants Rachmawati 2026.
- Some things don’t move. In broccoli and radish, glucosinolates and phenolics stayed the same across harvest days. Radish anthocyanins fell when it was cut on day 11 Ortiz 2024.
So a later cut is not a guaranteed nutrition boost. And it can cost you looks. In the cress and rocket trial, the older plants were richer but less fit for the fresh market Dereje 2026. For how microgreens compare with grown greens, see Are microgreens good for you?
Does sowing more seed give a bigger harvest?
Usually, yes, up to a point. But more weight per tray often means fewer nutrients per gram.
| Crops | Densities | What they found | Source |
|---|---|---|---|
| Sunflower, radish, green and red cabbage | Three densities per crop, under four light levels | More seed raised yield by up to about 22% (sunflower), 49% (radish), 52% (green cabbage) and 30% (red cabbage). Light level made no difference to yield in three of the four crops. | Lima 2026 |
| Red cabbage | 60 to 300 g per square meter | Yield rose with density. Calcium, iron, pigments and vitamin C fell. | Cecílio Filho 2025 |
| Rapini, kale, cress | 3 to 5 seeds per square cm | The highest density yielded 19% more than the lowest. | Signore 2024 |
| Red beet | 50 to 450 g per square meter | Under white light, 300 g was best. Under red-heavy light, yield kept rising to 450 g. | de Freitas 2024 |
| Basil, chives, scallion, shiso | 75 to 375 g per square meter | Yield rose with density. For basil, chives and shiso, 375 g gave no more than 300 g. | Arthur 2025 |
| Brassica crops | 4 to 12 seeds per cell | 12 seeds per cell in one mix gave the most yield. 4 seeds per cell in another mix gave more vitamin C and glucosinolates. | Ntsoane 2023 |
How much do microgreens yield per square foot?
It swings widely by crop, density and setup. Two trials give a sense of the range:
- Rapini on peat and fiber mats gave about 1.5 kg per square meter, or about 5 ounces per square foot Di Gioia 2016.
- Basil and rocket in a floating indoor system gave 2 to 3 kg per square meter, or about 6.5 to 10 ounces per square foot Bulgari 2021.
For profit, yield per year matters as much as yield per tray. Shorter cycles mean more harvests from the same shelf Yañez Medelo 2025. For the money side, see growing microgreens for profit.
Do microgreens regrow after cutting?
Most don’t, and the research barely tests it. Of the papers in our database, we found only one that measured a second cut.
That trial grew vegetable bean microgreens. Beans could give two or three cuts from one planting when cut at the base. One container of 100 seeds gave 320 to 400 g over two cuts, depending on the variety. The best variety gave about 200 g on both the first and second cut, and a full third cut too Kaigorodova 2024.
So if you want a second cut, large-seeded legumes are the place to test it. For which other crops growers try, see do microgreens regrow?
What the research doesn’t show yet
- Regrowth is barely studied. One bean trial is not enough to say which other crops regrow, or how a second cut compares on nutrients.
- Most trials test only a few crops. Timing and density results change from crop to crop, and even between cultivars Hongthongk 2026 Signore 2024.
- Few weigh cost against yield. The papers report weight and nutrients. Very few count seed cost, labor or energy per tray.
- Taste is rarely measured. Trials track weight, pigments and antioxidants. Few ask whether a later cut tastes better or worse.
Key papers to start with
Eight papers that carry most of the weight on this page. Each title opens the paper at the publisher.
Effects of harvest day after first true leaf emergence of broccoli and radish microgreen yield and quality
Harvest day vs yield, nutrients and fridge life. Best at about 75% true leaves.
Harvest time, photoperiod and white light irradiance on yield of red cabbage microgreens in plant factory
Cutting two days sooner: less per tray, more per year.
How harvesting time affects the phytochemical profiles and microbial load of brassica microgreens: Balancing health and safety
Cress and rocket from day 7 to day 19: nutrients, microbes and looks.
The effect of different harvest times on phenolic content and antioxidant activity in some microgreens
Cotyledon vs true leaf stage in five crops.
Seeding density outweighs light intensity in microgreens yield on a vertical farming system
Four crops. More seed beat more light for yield.
How does sowing density affect physiology, yield, and quality of red cabbage microgreens?
More yield, fewer minerals and less vitamin C per gram.
Optimising sowing density for microgreens production in rapini, kale and cress
Density and cycle length together, with seed cost in mind.
A new functional food product: microgreen vegetable beans, feature and nutritional properties
The one regrowth trial we found: two or three cuts from beans.
Newest papers on this topic
- Newest papers load from the research database.
Questions people ask
How many days until microgreens are ready to harvest?
It depends on the crop. In trials, radish was ready around day 10, broccoli around day 13 and chia from day 6 to 9. In one broccoli and radish study, the best yield came when about 75% of plants showed a true leaf.
Do microgreens regrow after cutting?
Most don’t. The one trial we found that tested it used vegetable beans, which gave two or three cuts from one planting when cut at the base. For most other crops, a fresh tray is the better bet.
How many times can you harvest microgreens?
Usually once. Bean microgreens gave up to three cuts in one trial, and the best variety gave about the same weight on the first and second cut.
Are microgreens more nutritious at the cotyledon or true leaf stage?
Often a little more at the true leaf stage, but not always. Phenolics rose 58% in dill and 30% in chia from cotyledon to true leaf. In broccoli and radish, glucosinolates and phenolics did not change with harvest day.
Does sowing more seed give a bigger harvest?
Usually, up to a point. Thicker sowing raised yield by up to about 50% in some crops. But it lowered calcium, iron and vitamin C per gram in red cabbage, and for some herbs the top density gave no extra yield.
How much do microgreens yield per square foot?
Trials ranged from about 1.5 kg per square meter for rapini to 2 to 3 kg for basil and rocket. That is roughly 5 to 10 ounces per square foot, depending on crop and setup.
Keep reading
Sources
- Ortiz, Zhu, Shakoomahally, et al. (2024). Effects of harvest day after first true leaf emergence of broccoli and radish microgreen yield and quality. Technology in Horticulture. doi.org/10.48130/tihort-0023-0031
- Yañez Medelo, Alves, Matos Ribera, et al. (2025). Harvest time, photoperiod and white light irradiance on yield of red cabbage microgreens in plant factory. Chilean Journal of Agricultural Research. doi.org/10.4067/s0718-58392025000200181
- Dereje, Dubey, Jacquier, et al. (2026). How harvesting time affects the phytochemical profiles and microbial load of brassica microgreens: Balancing health and safety. Journal of Agriculture and Food Research. doi.org/10.1016/j.jafr.2026.103072
- Barut Gök, Özdüven & Eryılmaz Açıkgöz (2024). The effect of different harvest times on phenolic content and antioxidant activity in some microgreens. KSÜ Tarım ve Doğa Dergisi. doi.org/10.18016/ksutarimdoga.vi.1216114
- Hongthongk & Rattanasuk (2026). Influence of cultivar and harvest stage on growth and phytochemical composition of amaranth microgreens. Pakistan Journal of Biological Sciences. doi.org/10.3923/pjbs.2026.234.242
- Rachmawati, Ridlo, Sumarni, et al. (2026). The effect of harvest time of basil microgreens (Ocimum basilicum L.) on phenolic content and antioxidant activity in a local wisdom-based horticultural system. Advance Sustainable Science Engineering and Technology. doi.org/10.26877/asset.v8i4.3572
- Junpatiw (2019). Effects of seed preparation, sowing media, seed sowing rate and harvesting period on the production of chia microgreens. International Journal of GEOMATE. doi.org/10.21660/2019.61.4726
- Signore, Somma, Leoni & Santamaria (2024). Optimising sowing density for microgreens production in rapini, kale and cress. Horticulturae. doi.org/10.3390/horticulturae10030274
- Lima, Manjavachi, Menas, et al. (2026). Seeding density outweighs light intensity in microgreens yield on a vertical farming system. Horticulturae. doi.org/10.3390/horticulturae12091149
- Cecílio Filho, Pindobeira, Alves, et al. (2025). How does sowing density affect physiology, yield, and quality of red cabbage microgreens? Bragantia. doi.org/10.1590/1678-4499.20240232
- de Freitas, da Costa Mello & Nemali (2024). Supplemental light quality affects optimal seeding density of microgreens. Urban Agriculture & Regional Food Systems. doi.org/10.1002/uar2.20064
- Arthur, Li, Bi, et al. (2025). Four herbal microgreen species varied in optimal seeding densities and growing substrate for maximized shoot yield and mineral nutrients. Technology in Horticulture. doi.org/10.48130/tihort-0025-0032
- Kaigorodova, Ushakov, Lukanin, et al. (2024). A new functional food product: microgreen vegetable beans, feature and nutritional properties. Vegetable Crops of Russia. doi.org/10.18619/2072-9146-2024-1-5-13
- Ntsoane, Manhivi, Shoko, et al. (2023). The phytonutrient content and yield of Brassica microgreens grown in soilless media with different seed densities. Horticulturae. doi.org/10.3390/horticulturae9111218
- Di Gioia, De Bellis, Mininni, et al. (2016). Physicochemical, agronomical and microbiological evaluation of alternative growing media for the production of rapini (Brassica rapa L.) microgreens. Journal of the Science of Food and Agriculture. doi.org/10.1002/jsfa.7852
- Bulgari, Negri, Santoro & Ferrante (2021). Quality evaluation of indoor-grown microgreens cultivated on three different substrates. Horticulturae. doi.org/10.3390/horticulturae7050096
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Search the harvest and yield papersThis page summarizes published research for education. Results come from specific crops, densities and growing conditions, and may differ in your own setup.
