How to Grow Microgreens Indoors Successfully: A Complete Guide

Microgreens are young vegetable and herb seedlings harvested one to three weeks after germination, picked right after the first true leaves appear above the initial seed leaves. Unlike sprouts, which are grown in water and eaten whole including roots, microgreens grow in soil or soil-free mediums, and only the stems and leaves are harvested and consumed. According to North Carolina State University’s Cooperative Extension, microgreens sit between sprouts and baby greens in size and maturity, typically reaching one to three inches tall before harvest.

Growing your own microgreens at home brings remarkable benefits beyond fresh flavor. Research from the University of Maryland found that some microgreens carry several times more nutrients than the mature vegetable, gram for gram. Furthermore, seed packets cost a fraction of store-bought containers, and no yard is needed since a simple windowsill or countertop provides enough space to grow a full tray within one to three weeks.

Getting started requires only basic, reusable supplies. Home growers need a shallow tray with drainage holes, a suitable growing medium such as potting mix or a soil-free mat, untreated organic microgreen seeds, a spray bottle for gentle watering, clean scissors for harvesting at the soil line, and optional items like a grow light and a humidity dome or plastic wrap for moisture retention during germination.

The planting process follows six straightforward steps. First, fill the container with one to two inches of moistened growing medium and press it down gently to keep the surface level. Second, scatter the seeds evenly across the surface and press them lightly into place. Third, cover the tray with a humidity dome or plastic wrap and keep it in a warm, dark spot for three to five days. Fourth, once tiny sprouts emerge, uncover the tray and move it to a sunny windowsill or under a grow light to trigger chlorophyll production.

Watering and lighting management are critical for success and help prevent common beginner issues like mold or leggy growth. Mist the soil gently one to twice daily or use bottom watering to keep the medium consistently moist without becoming soggy. For optimal development, provide at least four hours of direct sunlight from a south-facing window or run LED grow lights for 12 to 16 hours daily to yield flavorful, vibrant green microgreens.