Reusable Grow Medium - Size: Small Sprout Tray
Growing microgreens in our Small (Miniature) Sprouting Trays? This reusable grow medium is pre-cut to fit perfectly, giving you a clean, soil-free growing solution that lasts for months. Available in both food-grade silicone and 316-grade stainless steel, you can choose the material that best fits your growing style for this compact tray system.
Choose Your Material: Silicone or Stainless Steel?
Both materials minimize the need for soil or coco coir, maintain consistent moisture around roots, and can last for years with proper care. The choice comes down to your personal preferences and growing approach.
Silicone – Flexible, easy to handle, and simple to clean. The softer material makes root removal faster and is gentler on your hands during cleanup.
Stainless Steel – Rigid, extremely durable, and more resistant to cuts or tears. The firmer structure provides excellent support for aggressive root systems.
Not sure which to try? Our 10x10 Sampler Pack includes both materials so you can test them side-by-side before committing to a specific size.
Silicone Reusable Grow Medium for Small Sprouting Trays - 1.2mm
Key Specifications:
- Pre-Cut Dimensions: 4.5" x 7.825" – fits Small (Miniature) Sprouting Trays perfectly
- Hole Size: 1.2mm great for moisture retention
- Material: Food-Grade Platinum-Cured Silicone with fiberglass core for durability. 3rd party tested for FDA Compliance. LFGB Tested & Compliant.
- Flexibility: Easily customizable with household scissors
- Lifespan: Months of continuous use with proper care
- Silicone is rated for 20 to 30+ grow cycles per sheet with proper care
Why Choose Silicone? The flexible silicone design makes handling, seeding, and cleanup easier in the compact sprouting tray format. This hydroponic reusable mat supports moisture retention and root aeration while being gentle on your hands during harvest and cleanup. Works well with most popular microgreen varieties including Sunflower, Radish, Broccoli, Arugula, Basil, Cabbage, Kohlrabi, and most Brassica family crops.
Care & Maintenance:
- Cleaning: After harvest, use our Microgreen Medium Scraper/Cleaning Tool to remove root residue. Wash with warm water and a free-and-clear dish soap (or another silicone-safe, food-safe soap).
- Sanitization: For deeper sanitation between grows, carefully pour boiling water over the mat or submerge it for 1–2 minutes. Allow to air dry fully before reuse.
- Read our complete silicone care guide for stain troubleshooting and long-term maintenance tips.
Stainless Steel Reusable Grow Medium for Small Sprouting Trays
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. This material is ideal for growers who want maximum durability and don't mind a firmer surface during cleanup. Works well with most popular microgreen varieties including Sunflower, Radish, Broccoli, Arugula, Basil, Cabbage, Kohlrabi, and most Brassica family crops.
Care & Maintenance:
- Cleaning: After harvest, use our Microgreen Medium Scraper/Cleaning Tool to remove root residue. Dishwasher-safe for easy cleaning.
- 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
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 silicone and stainless steel mesh screens are backed by our 1-year warranty. Grow with confidence.
You may find these blogs helpful:
-
Silicone Reusable Microgreen Grow Medium - Complete Grow Medium Overview
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How to Clean and Sanitize Microgreen Trays and Reusable Grow Mediums: Complete Guide
-
Microgreens and Mold: The Complete Guide to Prevention, Identification, and Treatment
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Knowing the Right Time to Transition Microgreen Trays from Weight to Blackout
-
Common Mistakes When Growing Microgreens (And How to Avoid Them)
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Looking for the Best Microgreen Growing Advice? Start with On The Grow
Important Product Disclaimers
- Please review our Reusable Grow Medium Safety Disclaimer before purchasing
- Trays, seeds, and other items shown in photos are NOT included
- Silicone staining: Some seed varieties may cause natural staining on the silicone surface—this doesn't affect performance
- Fiberglass core (Silicone): Replace your mat if you notice tears, deep cuts, or significant wear that could compromise the fiberglass core integrity. Learn more about replacement timing
- Sharp edges (Stainless Steel): 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 complete nutritional disclaimer, see: [link to Safety Disclaimer page]
Sustainable, reusable growing for your small sprouting tray system—choose silicone or stainless steel for clean, efficient cultivation. 🌱