How to Grow Microgreens Indoors
By Maya Ellery · May 30, 2026 · 6 min read
Quick answer
Sow microgreen seed densely on an inch of damp potting mix in a shallow tray, cover for 2–3 days to germinate, then uncover in bright light and cut at the stem base 7–12 days after sowing.
What you need
- Two shallow trays — one with drainage holes, one as a base
- An inch of fine potting mix or coco coir
- Microgreen seed: radish, broccoli, sunflower, pea shoots, mustard
- A spray bottle
The ten-day method
- Fill the tray with an inch of mix and dampen it evenly.
- Scatter seed densely — almost touching — and press lightly in.
- Cover with the second tray for 2–3 days of darkness to trigger even germination.
- Uncover and move to bright light; mist twice a day or bottom-water.
- Harvest with scissors just above the soil at 7–12 days, when the first true leaves appear.
Best seeds for beginners
| Seed | Days to harvest | Flavor |
|---|---|---|
| Radish | 7–9 | Peppery, crisp |
| Broccoli | 9–11 | Mild, sweet |
| Pea shoots | 10–12 | Sweet, crunchy |
| Sunflower | 9–12 | Nutty, substantial |
| Mustard | 7–10 | Hot, sharp |
Setting up a rotation
Sow one tray every four or five days and you will always have something ready. Microgreens do not regrow after cutting — compost the mix or refresh it and start again.
Frequently asked questions
Do microgreens need a grow light?
No. A bright windowsill is enough, though a grow light produces stockier, greener shoots and is useful in winter.
Can I use regular seeds from a seed packet?
Yes, as long as they are untreated. Buying in bulk as microgreen seed is simply far cheaper given how densely you sow.
Are microgreens the same as sprouts?
No. Sprouts are germinated in water and eaten whole including the root; microgreens grow in a medium and are cut above the soil line.
