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Red cabbage microgreens growing on 1.2mm reusable silicone grow medium in 10x20 tray showing healthy root structure on bottom of mat
silicone microgreen grow mat compared to stack of disposable coco coir mediums showing 20 to 30 grow lifespan
Cost per grow breakdown showing reusable silicone microgreen mat pays for itself in a handful of harvests compared to disposable mediums
Microgreens variety compatibility chart showing which seeds grow best on reusable silicone grow mats including broccoli radish kale and which to avoid
Comparison of 1.2mm and 1.7mm hole size silicone microgreen grow mats showing seed compatibility for each variant
Food grade platinum cured silicone microgreen grow mat third party tested for FDA compliance
Reusable silicone microgreen grow mat reduces landfill waste by replacing 20 to 30 disposable mediums over 18 to 24 month lifespan
Four step guide to clean and sanitize reusable silicone microgreen grow mat with free and clear soap and boiling water at 212 degrees
Broccoli microgreens grown on On The Grow silicone reusable grow medium, 1.2mm holes shown alongside dense green canopy
Radish microgreens grown on On The Grow silicone reusable grow medium, 1.2mm holes shown alongside dense green and purple canopy
Sunflower microgreens grown on On The Grow silicone reusable grow medium, 1.2mm mesh holes shown alongside thick green canopy
Purple kohlrabi microgreens growing on On The Grow 10x20 reusable silicone grow medium, top angle showing medium texture
Purple kohlrabi microgreens being harvested from On The Grow reusable silicone grow medium in 10x20 tray
Microgreen seeds germinating on On The Grow reusable silicone grow medium with mature purple kohlrabi microgreens in background
Close-up of arugula microgreen seeds in early germination stage on On The Grow reusable silicone grow medium showing 1.2mm mesh holes
On The Grow 10x20 reusable silicone grow medium flat lay, showing full mesh surface and 1.2mm hole pattern
On The Grow reusable silicone grow medium sitting in a Bootstrap Farmer 10x20 microgreen grow tray
Infographic listing 68 plus microgreen seed varieties compatible with On The Grow silicone reusable grow medium including broccoli, radish, kale, and basil
Microgreen seed varieties not yet tested on reusable grow medium, results unknown, including herbs, lettuce, and specialty greens
Microgreen seeds that grow best without reusable grow medium, pea varieties recommended for mesh tray only due to aggressive roots
Microgreen seeds not compatible with silicone reusable grow medium, including amaranth, beets, Swiss chard, and cilantro
Radish microgreens growing on On The Grow reusable silicone grow medium under pink grow lights, side profile showing root structure

Reusable Silicone Grow Medium for Microgreens – 10x20

$15.97
$15.97
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10x20 Silicone Reusable Microgreen Grow Medium - 1.2mm

Tired of the mess and waste that comes with soil and coco coir? Our 10x20 Silicone Reusable Microgreen Grow Medium offers a clean, soil-free alternative that reduces single-use growing materials while simplifying your microgreen setup. Designed to fit standard 10x20 trays, this food-grade silicone grow mat is a practical option for both home and commercial growers.

Why Choose Silicone for Your 10x20 Trays?

Unlike traditional grow mediums that need replacing after every harvest, this hydroponic reusable silicone mat can last for months with proper care—helping reduce waste and ongoing supply costs. The 1.2mm hole pattern supports moisture retention and root aeration, while the flexible silicone design makes handling, seeding, and cleanup easier.

This medium works well for many popular microgreen varieties, including Sunflower, Radish, Broccoli, Arugula, Basil, Cabbage, Kohlrabi, and most Brassica family crops.

Key Specifications & Features

  • Pre-Cut Dimensions: 19.65" x 9.5" – fits standard BSF 10x20 microgreen trays
  • Hole Size: 1.2mm – for optimal root development
  • 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 for custom tray sizes
  • Lifespan: Months of continuous use with proper care and maintenance
  • Silicone is rated for 20 to 30+ grow cycles per sheet with proper care

Simple Care & Maintenance for Maximum Longevity

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). The flexible silicone surface makes root removal quicker and easier than rigid materials.

Sanitization between grows: For deeper sanitation, carefully pour boiling water over the mat or submerge it for 1–2 minutes (use caution when handling hot water). Allow the mat to air dry fully before reuse. Many growers sanitize in batches after harvest.

For additional tips, stain troubleshooting, and long-term care, see our Read our complete silicone care guide

Seed Compatibility

✅ Works Well With:
Sunflower, Pea, Radish, Broccoli, Kale, Cabbage, Arugula, Basil, Mustard Greens, Kohlrabi, and most Brassica varieties

⚠️ More Challenging:
Amaranth can grow successfully at 75°F with a seedling heat mat used during germination. Very fine seeds may require adjustments depending on your setup.

❌ 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.

Detailed seed compatibility infographics are included in the product photos.

Start Small, Scale Confidently

If you’re new to reusable grow mediums, we recommend starting with a 2-pack to test the setup in your environment. Once you’re dialed in, 10-packs offer better value for higher-volume growing.

Want to compare materials? Try our 10x10 Sampler Pack featuring both silicone and stainless steel samples to find your perfect match.

Discontinued: Stainless Steel 10x20 Version

As of January 2026, we’ve discontinued the stainless-steel version of our 10x20 grow medium indefinitely to focus on silicone, which has become the preferred option for most growers. For those interested, we still carry 10x10 Stainless Steel Reusable Grow Medium

More Sizes Available

Looking for different tray sizes? We offer both silicone and stainless steel options in multiple pre-cut dimensions. Browse all reusable grow medium sizes here.

1-Year Warranty

All silicone mesh screens are backed by our 1-year warranty.

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Important Product Disclaimers

  • Please review our Reusable Grow Medium Safety Disclaimer before purchasing
  • Commercial use may require more frequent replacement & quicker deteriation
  • 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: Replace your mat if you notice tears, deep cuts, or significant wear that could compromise the fiberglass core integrity. Learn more about replacement timing
  • Variable results: Growing success depends on your environment, experience, and methods. We recommend testing with small packs before committing to larger quantities
  • 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]