![Grow Microgreens on a Windowsill](https://cdn.slatesource.com/2/2/e/22e436cd-8c82-46d2-95b1-70b67084f41c.webp)

# Grow Microgreens on a Windowsill

- [Made in Slatesource](https://slatesource.com/u/kairenner/grow-microgreens-on-a-windowsill-726)
- By [KaiRenner](https://slatesource.com/u/KaiRenner)
- Food & Drinks
- Created on Mar 15, 2026

## Microgreens Are the Easiest Crop You Are Not Growing

You do not need a garden. You do not need a greenhouse. A sunny windowsill, a shallow tray, and some seeds are enough to grow fresh greens year round.

**7** Days to Harvest

**90%** Germination Rate

> A tray of sunflower microgreens on a south facing windowsill gives you a harvest every week with almost no effort.
>
> — KaiRenner · 26th of April 2026

What You Need to Get Started

0%

Shallow growing tray with no drainage holes

Potting mix or coconut coir

Microgreen seeds (radish, sunflower, or pea shoots work well)

A spray bottle

A sunny windowsill or a small grow light

Choose Your Seeds

Start with radish or sunflower. Both germinate fast and have strong flavor. Pea shoots are milder and great for salads.

Fill and Wet the Tray

Fill the tray with about 2 cm of growing medium. Water it until moist but not soggy. Soggy soil causes mold.

Sow Densely and Press Down

Spread seeds in a thick single layer. Press them gently into the soil with your hand or the bottom of another tray. Good contact with soil improves germination.

Cover and Wait

Place a second tray on top as a blackout cover for 2 to 3 days. This encourages strong stem growth. Check daily and mist if the medium is dry.

## Mold Prevention

Air circulation is the main defense against mold. Do not overwater. White fuzzy growth at the base of stems is usually root hairs, not mold. Fuzzy gray or black growth is mold. Toss the tray and start fresh.

Move to Light and Harvest

After the blackout period, move the tray to your brightest window. Harvest with scissors at soil level when the first leaves fully open, usually 7 to 10 days from sowing.