Growing microgreens in our Small (Miniature) Sprouting Trays? This reusable stainless steel grow medium is pre-cut to fit perfectly, giving you a clean, soil-free growing surface.
Stainless Steel Reusable Grow Medium for Small Sprouting Trays, 1mm
Key Specifications:
- Pre-Cut Dimensions: 4.5" x 7.825", fits Small (Miniature) Sprouting Trays perfectly
- Hole Size: 1mm, great for root development
- Material: 316-Grade Stainless Steel Mesh
- Durability: Corrosion-resistant, long-lasting, and highly resistant to cutting or tearing
- Customization: Can be trimmed with tin snips for custom sizing
- Lifespan: Months of continuous use with proper care
Why Choose Stainless Steel? The rigid stainless steel mesh provides excellent structural support in the compact sprouting tray format, so the sheet stays flat while roots take hold. It is the right pick for growers who want maximum durability, aggressive cleaning options, and a surface that will not tear. Works well with most popular microgreen varieties including Sunflower, Radish, Broccoli, Arugula, Basil, Cabbage, Kohlrabi, and most Brassica family crops.
Care & Maintenance:
- Cleaning: After you harvest, use our Microgreen Medium Scraper/Cleaning Tool to remove root residue.
- Sanitization: The stainless steel material can handle aggressive cleaning methods including boiling water or commercial food grade sanitizers for stainless steel.
- Caution: The edges on stainless steel can be quite sharp and may penetrate skin. Handle with care, especially during initial setup and cleaning. Edges may become frayed or bent during shipping.
- Read our complete stainless steel care guide for detailed maintenance protocols.
Seed Compatibility
✅ Works Well With: Sunflower, Pea, Radish, Broccoli, Kale, Cabbage, Arugula, Basil, Mustard Greens, Kohlrabi, and most Brassica varieties
⚠️ More Challenging: Amaranth, very fine Mustard seeds, and other tiny seeds may require adjustments
❌ Not Recommended: Swiss Chard, Beets, and Cilantro (these perform better in soil or coco coir)
💡 Best Without a Medium: Pea varieties with aggressive root systems often perform best directly on mesh trays without a grow medium
Prefer Silicone?
We offer this same pre-cut size in food-grade platinum-cured silicone if you want a flexible surface that is easier on your hands at cleanup and simpler to handle in the compact tray format. Not sure which suits your setup? Our 10x10 Sampler Pack includes both materials so you can test them side by side before committing to a specific size.
More Sizes Available
Using different tray sizes? We offer both silicone and stainless steel reusable grow mediums in multiple pre-cut dimensions:
- 10x20 Size for standard full-size trays
- 10x10 Size for half-size growing
- Large Sprout Tray Size for larger sprouting systems
Browse all reusable grow medium sizes here.
1-Year Warranty
All stainless steel mesh screens are backed by our 1-year warranty. Grow with confidence.
You may find these blogs helpful:
- Which Microgreen Seeds Work on Reusable Grow Mediums?
- Reusable Microgreen Grow Medium, Complete Grow Medium Overview
- How to Clean and Sanitize Microgreen Trays and Reusable Grow Mediums: Complete Guide
- Microgreens and Mold: The Complete Guide to Prevention, Identification, and Treatment
- Knowing the Right Time to Transition Microgreen Trays from Weight to Blackout
- Common Mistakes When Growing Microgreens (And How to Avoid Them)
- Looking for the Best Microgreen Growing Advice? Start with On The Grow
- Frequently Asked Questions
Important Product Disclaimers
- Please review our Reusable Grow Medium Safety Disclaimer before purchasing
- Trays, seeds, and other items shown in photos are NOT included
- Sharp edges: The edges on stainless steel can be quite sharp and may penetrate skin. Handle with caution. Edges may become frayed or bent during shipping.
- Not recommended for: Swiss Chard, Beets, Cilantro (these perform better in traditional soil-based methods)
- Challenging varieties: Amaranth, fine Mustard seeds, and other very small seeds may require special techniques
- NUTRITIONAL CONTENT DISCLAIMER: This product is an inert growing medium that does not add or remove nutrients from your crops. We make NO claims about nutritional content or nutrient density of microgreens grown using this product. Nutrient density depends on many factors outside our control including seed variety, water quality, light, fertilizers, and growing conditions, not the growing medium itself. We have not conducted laboratory testing and are not nutritionists. For the complete nutritional disclaimer, see our Safety Disclaimer page.
Sustainable, reusable growing for your small sprouting tray system. 🌱