How to Harvest Microgreens

Harvesting microgreens is a satisfying moment after a week or two of tending a tray. The process itself is quick and simple, but the details matter: the height at which you cut, the cleanliness of your tool, whether you rinse before or after cutting, and how you handle the shoots after harvest all affect the quality and shelf life of what you eat. Done well, harvesting takes a few minutes and produces a clean, fresh-tasting crop that keeps for several days in the fridge.

Tools and Preparation

You need clean, sharp scissors or a small serrated knife. Dull tools compress rather than cut the stems, which bruises the tissue at the cut point and accelerates spoilage. Clean the blade with a damp cloth and allow it to air dry before harvesting — you do not want cleaning product residue on your food. Have a clean bowl or colander ready to receive the cut shoots, and a source of cool running water for rinsing.

Harvest in the morning if possible. Plants have been photosynthesising overnight and are at their highest energy state early in the day. This is a minor factor, but morning harvests are consistently observed to produce shoots with slightly better flavour and texture than late-afternoon harvests from the same tray.

The Cut

Hold a small section of the canopy gently with one hand to stabilise it, and cut with scissors just above the medium surface — leaving 0.5 to 1 cm of stem in the tray. This is high enough to avoid picking up soil or medium particles on the cut end, and low enough that you are not wasting shoot length. Work across the tray in sections, collecting the cut shoots in your bowl. For pea shoots, you can cut higher — above the lowest set of leaves — to encourage regrowth from the nodes below.

Rinsing

Rinse the cut microgreens in a colander under cool running water. This removes any seed hulls, loose soil particles and surface dust. Swirl gently — do not crush or press the shoots. For sunflower microgreens with stubborn seed hulls, a gentle shake in a bowl of water helps the hulls float free. After rinsing, shake off excess water and either use immediately or dry gently.

For storage, the greens must be as dry as possible. A salad spinner is ideal — a few seconds of spinning removes most of the surface moisture without damaging the shoots. Alternatively, spread on a clean dry cloth and pat gently, then allow to air dry for 10 to 15 minutes before refrigerating.

Immediate vs. Pre-Harvest Washing

Some growers prefer to rinse the tray with a gentle shower of water from above the night before or the morning of harvest, rather than rinsing the cut shoots. This pre-washes the canopy and removes seed hulls before cutting. Either approach works; the key point is to ensure the shoots are well-dried before refrigerating if you are not eating them immediately. Wet shoots in a sealed container will deteriorate within 24 hours.

After Harvest — What to Do with the Tray

After harvesting, the root mat and remaining stubs can either be composted directly (they decompose rapidly) or left in the tray for potential regrowth — pea shoots, sunflower and wheatgrass all produce useful second cuts. The tray should be washed with warm water and soap, rinsed with a dilute hydrogen peroxide solution and air-dried before the next use. Clean equipment is the most effective disease prevention measure in microgreens growing.