How to Grow Microgreens in Ice Cube Trays with Natural Light (Radish, Mustard & Broccoli)

In this video, I show how we grow microgreens using something you probably already have at home—ice cube trays! We used potting soil and a sunny window to grow mustard, radish, and broccoli microgreens over 8 days, and the results were surprisingly productive.

This method is low-cost, beginner-friendly, and a great way to experiment with growing food indoors. I’ll walk through the entire grow cycle from filling the trays and seeding to germination, light exposure, watering, and harvest. You’ll also see how to spot signs of when your trays are ready for light, how to fix droopy greens, and why orientation and watering really matter—even in tiny trays.

One of our favorite parts? You can pop the greens out like ice cubes, which opens up some fun and creative ways to plate or share your microgreens. Whether you’re just getting started or want to try something fun with kids or limited space, this video is a great introduction to growing microgreens with natural light and minimal setup.

All of the tools, seeds, and supplies we used are linked below. Let us know what you think in the comments, and happy growing!

IN THIS VIDEO →
✅ Become a Channel Member: https://onthegrow.tv/JoinMembersOnly
➽ Microgreen Seeds: https://onthegrow.tv/Microgreenseeds
➽ Ice Cube Trays: https://onthegrow.tv/IceCubeTraySet
➽ Different Potting Soil: https://onthegrow.tv/BurpeePottingSoil
➽ Sprayer for Watering: http://homedepot.sjv.io/Z9NQ0

➽ Learn When to transition from weight to blackout: https://onthegrow.tv/BlackoutToWeight https://onthegrow.tv/AvoidGrowMistakes
➽ Learn Common Mistakes & How to avoid them:

MORE EDUCATION FROM ON THE GROW
➽ Our Blog: https://onthegrow.net/blogs/news
➽ Books, Online Course, Free PDF downloads: https://onthegrow.tv/Education

SUPPORT ON THE GROW
➽ Shop: https://onthegrow.net/
➽ Etsy Shop: https://www.etsy.com/shop/OnTheGrowLLC

FOLLOW US
➽ All Our Links: https://linktr.ee/Onthegrow
➽ Facebook: https://www.facebook.com/onthegrowfarms
➽ Instagram: https://www.instagram.com/onthegrowfarms/
➽ TikTok: https://www.tiktok.com/@onthegrowfarms

ON THE GROW VIDEO PLAYLISTS
➽ All How To Grow Microgreens: https://www.youtube.com/playlist?list=PLkEXI0BumyG5OBbqj_wXM6gnPB6gJ4alW
➽ All Microgreen Experiments: https://www.youtube.com/playlist?list=PLkEXI0BumyG6Emok0J7Ed9acUtVp81bBI
➽ Microgreen DIY Builds: https://www.youtube.com/playlist?list=PLkEXI0BumyG7elfJ4g4GjAznwknScBgDy

0:00 – Introduction to Growing Microgreens in Ice Cube Trays
0:16 – Setting Up the Ice Cube Trays and Silicone Reusable Medium
0:37 – Seeding the Trays with Mustard, Radish, and Broccoli
1:02 – Misting for Germination and Trapping Humidity
2:07 – Day 2: Checking Seed Progress and Watering
3:19 – Day 3: Preparing for Blackout Phase
4:23 – Day 4: Signs of Germination and Preparing for Light
5:09 – Day 5: Exposing Microgreens to Light and Bottom Watering
6:00 – Day 6: Observing Growth and Adjusting Watering
7:00 – Day 7: Harvest-Ready Radish Microgreens
8:06 – Harvesting Radish Microgreens and Checking Roots
9:03 – Day 8: Harvesting Mustard and Broccoli Microgreens
12:31 – Final Harvest and Flavor Notes for Mustard and Broccoli
13:15 – Displaying the Full Harvest from Three Ice Cube Trays
13:59 – Closing Remarks and Happy Growing

DISCLAIMER On The Grow occasionally links to goods or services offered by vendors to help you find the best products to care for plants. Some of these may be affiliate links, meaning we earn a small commission if items are purchased. As an Amazon Associate, we earn from qualifying purchases. More info on our process: https://onthegrow.net/pages/disclaimer

#IceCube #Microgreens #MicrogreensAthome #IndoorGardening #AtHome #Radish #Mustard #Broccoli #GrowaGarden #Soil #IndoorGrowing #UrbanFarming #HomeGardening #GrowYourOwnFood #ChefAtHome #FarmersMarket #HowToGrow