How to Grow Microgreens at Home: Nutrition, Varieties and Step-by-Step Method

Microgreens transform the visual and nutritional profile of almost any dish they touch. A handful of radish microgreens on a fried egg adds a peppery brightness and deep crimson colour that no garnish from a supermarket packet can replicate. Sunflower microgreens folded into a grain bowl provide a satisfying, nutty crunch and a protein hit that makes the dish more substantial. Pea shoots draped over a simple avocado toast turn an everyday breakfast into something that looks genuinely considered.

Beyond aesthetics, the nutritional density of microgreens is genuinely remarkable. Research published in the Journal of Agricultural and Food Chemistry found that red cabbage microgreens contained 40 times more vitamin E and six times more vitamin C than mature red cabbage leaves. Broccoli microgreens contain glucoraphanin, a precursor to sulforaphane, at concentrations 10–100 times higher than mature broccoli. These are not trivial nutritional differences — they represent a meaningful boost from a very small amount of food.

Having microgreens growing on your counter also changes cooking behaviour in a subtle but real way. You reach for them constantly: a pinch over soup, a handful into sandwiches, a garnish on a salad. They become a reflex, a way of adding freshness, texture and nutrition to everything without any advance planning.

Microgreens can be grown in a surprisingly minimal setup. At its most basic, you need: a shallow tray or container (2–5 cm deep), growing medium, seeds and light.

**Trays:** Standard 1020 growing trays (25 cm x 50 cm) are the industry standard and hold enough microgreens for a family. For home use, any shallow container with drainage holes — including repurposed food trays — works well. Blackout trids (lidded trays used to simulate darkness during germination) improve germination uniformity and reduce mould.

**Growing medium:** Unbleached coconut coir (compressed into bricks that expand with water) is the most popular medium: it is sterile, well-draining, lightweight and sustainable. You can also use a thin layer of organic seed-starting mix. Avoid garden soil, which is too dense and often harbours pathogens. Some varieties — particularly peas, sunflowers and wheatgrass — grow well on damp paper towels or burlap, requiring no soil at all.

**Light:** Microgreens need light only after germination, which happens in darkness. Once shoots emerge, they need 12–16 hours of bright light per day. A south-facing windowsill works well. A small LED grow light at 15–20 cm distance is more consistent and allows year-round growing regardless of window orientation. Without adequate light, microgreens become pale, leggy and flavour-poor.

**Temperature:** Most varieties germinate and grow best at 18–24°C. Avoid draughts and temperature fluctuations, which slow growth and encourage damping-off fungal disease.

**Radish (Raphanus sativus)** — The definitive beginner microgreen. Fast (ready in 6–8 days), reliable, and produces striking magenta or purple stems with a sharp, peppery flavour. 'Daikon' radish microgreens are mild; 'Red Arrow' varieties are intensely peppery.

**Sunflower (Helianthus annuus)** — Large, meaty cotyledons with a mild, nutty flavour. Takes 8–12 days. Pre-soaking seeds for 8–12 hours before sowing dramatically improves germination. One of the best microgreens for use in salads, wraps and grain bowls due to its satisfying texture.

**Pea Shoots (Pisum sativum)** — Sweet, tender shoots with a fresh pea flavour. Ready in 8–12 days. Grow on coir or paper towel with pre-soaked seeds. Among the most popular microgreens for culinary use, pairing well with cheese, fish and Asian-inspired dishes.

**Broccoli (Brassica oleracea)** — Small, delicate sprouts with a mild, slightly spicy flavour and outstanding nutrition (particularly sulforaphane content). Ready in 7–10 days. Do not pre-soak brassica seeds — they have a mucilaginous coating that becomes sticky when wet.

**Amaranth (Amaranthus spp.)** — Stunning deep purple-red seedlings with a mild, earthy flavour. Ready in 8–10 days. One of the most visually dramatic microgreens and a reliable producer.

**Coriander (Coriandrum sativum)** — Intense cilantro flavour, ready in 14–18 days (slower than most). Crush seeds lightly before sowing to break the husk, which actually contains two seeds. Worth the wait for Southeast Asian and Mexican dishes.

**Step 1 — Prepare the tray:** Fill a 1020 tray to within 1 cm of the rim with pre-moistened coir or seed-starting mix. Press down gently to create an even, firm surface without compacting. The growing medium should be damp but not dripping — squeeze a handful and only a few drops should fall.

**Step 2 — Sow seeds:** Scatter seeds evenly and densely across the surface. Aim for a single layer of seeds with minimal overlapping. Seeding density varies by variety: small seeds like radish and broccoli are sown at approximately 30 g per 1020 tray; large seeds like sunflower and peas at 100–150 g per tray.

**Step 3 — Germination (days 1–3):** Cover the seeded tray with a second empty tray or a blackout lid to exclude light and maintain humidity. Place something heavy on top (a brick or a book) to press the seeds into contact with the growing medium — this improves germination uniformity. Mist the seeds with a spray bottle once per day.

**Step 4 — Move to light (days 3–5):** Once the majority of seeds have germinated and shoots are 1–2 cm tall, remove the cover and move the tray to your light source. At this point, bottom watering is preferable: set the tray in a second tray containing 1–2 cm of water for 20 minutes, then drain. This delivers water to the roots without wetting the foliage.

**Step 5 — Harvest (days 6–14):** Microgreens are ready to harvest when they have developed their first set of cotyledon leaves (seed leaves) and are 5–8 cm tall. Use sharp scissors to cut just above the growing medium. Rinse, spin dry and use immediately or refrigerate in an airtight container for up to five days.

Microgreens are a short-cycle crop, so 'ongoing care' spans less than two weeks — but what you do in that time significantly affects yield and quality.

**Watering:** After moving trays to light, water exclusively from the bottom. Pour water into the outer tray and allow the inner tray to absorb it for 20 minutes, then drain. Bottom watering prevents the wet foliage conditions that cause damping-off (a fungal condition that collapses seedlings at the stem base). In warm conditions, water daily; in cooler or lower-light environments, check soil moisture with a finger before each watering — the medium should be damp but never soggy.

**Feeding:** Microgreens grown in coir have no available nutrients in their medium, but this is by design. The seed itself contains all the nutrients needed for the seedling to reach harvest stage. Fertiliser is not necessary and can cause more harm than good by promoting rapid, watery growth at the expense of flavour and nutritional density.

**Mould prevention:** White fuzzy growth at the base of microgreens is usually root hairs, not mould — it is normal and harmless. True mould is grey, green or black and has a distinct smell. Prevent it by ensuring good air circulation, avoiding overwatering, maintaining appropriate temperature (below 24°C) and not sowing seeds too densely. If mould does appear, harvest immediately and improve conditions before the next tray.

The optimal harvest window for microgreens is typically at the cotyledon stage — when the seed leaves are fully unfurled and the first true leaves are just beginning to emerge. Harvesting at this point delivers maximum flavour, texture and nutritional density. Waiting until the first true leaves fully develop gives more yield by weight but generally at the cost of some nutritional intensity.

Harvest in one cut, using clean, sharp scissors or a small knife, cutting just 1–2 mm above the soil surface. Do not attempt to regrow after cutting — unlike mature plants, microgreens do not regenerate from the cut stem, and the growing medium is typically exhausted after one cycle. Compost the spent medium (spent coir mixed with root mass makes excellent garden compost) and start a fresh tray.

Freshly cut microgreens are best used immediately. If storing, do not wash before refrigerating — excess moisture accelerates deterioration. Place dry microgreens in a lidded container or zip-lock bag lined with paper towel to absorb any condensation. Most varieties keep well for 4–6 days refrigerated. Pea shoots and sunflower are best consumed within 2–3 days of harvest as they wilt more quickly.

For gifting or selling at a local market, microgreens can be stored and transported still growing in their tray with a final watering — they continue to grow slowly and are best that way.

The most common use of microgreens is as a garnish or topping, and there is nothing wrong with that — a handful of radish microgreens over avocado toast, pea shoots scattered on a risotto, or sunflower microgreens piled on top of a bowl of ramen transforms the visual appeal and adds a fresh textural contrast to rich dishes.

Beyond garnishing, microgreens hold their own as a primary ingredient. A microgreen salad — mixed varieties with a simple lemon and olive oil dressing and flaked sea salt — is a genuinely beautiful and nutritious dish in its own right. Broccoli and sunflower microgreens blended into a green smoothie with apple, cucumber and ginger deliver exceptional nutritional density without significantly altering flavour.

Microgreens wilt quickly when exposed to heat, so they are almost always added raw and at the last moment. The exception is pea shoots, which can be briefly wilted in a warm pan with garlic and olive oil (30 seconds maximum), similar to spinach. Radish microgreens are exceptional in tacos, fish tacos especially, where their peppery bite cuts through rich, fatty proteins. Coriander microgreens are the obvious companion to Mexican, Thai and Vietnamese dishes. Amaranth microgreens add dramatic colour to beetroot carpaccio or goat's cheese salads.