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On The Grow large sprouting tray kit with reusable silicone grow medium, green water trays, and scraper tool on white background
Large sprouting tray set with reusable silicone grow mediums stacked on a countertop against a marble tile wall
Graphic showing all items included in the On The Grow large sprouting tray kit: trays, reusable silicone grow mediums, scraper tool, and grow guide
Large sprouting tray kit product shot with BPA-free badge and material callouts: BPA-free plastics, food-grade silicone grow medium, and polypropylene
Large sprouting tray kit use case graphic showing microgreens, wheatgrass, cat grass, and sprouting with lush green microgreens growing in trays
Side-by-side comparison of 2.5mm white mesh tray and 1.2mm food-grade silicone reusable grow medium with seed size reference
Infographic showing external and internal dimensions of the large sprouting tray: 12.75 by 9.5 inches external, 11 by 8 inches internal
Large sprouting tray kit graphic highlighting thick durable plastic construction and drop-resistant design
Large sprouting tray shown with coco coir and used as a blackout and stackable tray for microgreens germination
Feature callout graphic for the On The Grow reusable silicone grow medium showing 1.2mm mesh, food-grade silicone, and microgreens growing in tray
Green scraper tool being used to remove microgreen roots and stems from a reusable silicone grow medium in a large sprouting 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

Large Sprouting Tray Kit for Microgreens – 5-Pack Set

$28.97
$28.97
Sold out
Free US Shipping on orders over $65.*

Large Sprouting Tray Set with Silicone Reusable Grow Medium

Crafted from thick, durable BPA-free PP (polypropylene) plastic, this large sprouting tray set is designed for growing microgreens, sprouts, and grasses with or without soil. The included silicone reusable grow medium sheets allow you to grow smaller seeds—such as broccoli—without relying on coco coir or soil.

*Note about this product (4/30/26): This item will be leaving our store once it sells out. Our manufacturer is discontinuing production of the large sprouting trays due to rising material costs. We will still carry the large sprouting tray sized reusable grow medium, as well as the small sprouting trays, but the large sprouting trays & tray kit will no longer be available unless we hear otherwise. If you are looking for a tray that grows a similar amount of microgreens without being quite as big, we highly suggest our 7x14 Tray Kit as a great replacement.

Why Growers Like This Tray Set

✅ Durable, Food-Safe Construction
Made from sturdy BPA-free polypropylene built to handle repeated use and regular washing.

✅ Designed for a Wide Range of Seeds
The white mesh tray features dense 2.5 mm holes, making it suitable for growing larger seeds like wheatgrass, mung beans, and peas directly on the tray, while the silicone medium supports smaller seed varieties.

✅ Easy Watering & Tray Separation
The concave–convex tray design allows the inner mesh tray to be lifted easily without disturbing roots or young greens—making watering and rinsing simple.

✅ Versatile Growing Options
Ideal for:

  • Microgreens

  • Sprouts

  • Wheatgrass & cat grass

  • Classroom or kids’ DIY growing projects

  • Giftable home gardening setups

What’s Included

  • 5× Large Green Sprouting Tray Sets

  • 5× Silicone Reusable Grow Medium Sheets 1.2mm

  • 1× Scraper / Cleaning Tool

A single tray can grow enough microgreens or sprouts for a small family.

Tray Dimensions & Specs

  • External Tray Size: 12.75" × 9.5" × 1.875"

  • Mesh Tray Internal Size: 11" × 8" × 1"

  • Green Tray Internal Size: 11" × 8" × 1.5"

  • Mesh Hole Size: 2.5 mm

  • Capacity: Holds approx. 3–4 cups of soil or coco coir if using traditional mediums

  • Quantity: 5-pack

  • Silicone is rated for 20 to 30+ grow cycles per sheet with proper care
  • 1.2mm Silicone reusable grow medium is made from Food-Grade Platinum-Cured Silicone with fiberglass core for durability. 3rd party tested for FDA Compliance. LFGB Tested & Compliant.

Compatibility Notes

Important Notes

  • Please review our Reusable Grow Medium Safety Disclaimer prior to purchase

  • Seeds and plants are not included

  • Silicone grow medium may develop stains with some seed varieties

  • Silicone contains a fiberglass core for strength — replace if torn, deeply cut, or excessively worn

  • 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]

Inventory Notice

Due to limited inventory, the green scraper shown in photos may be substituted with a white scraper for some orders. The scraper is identical in function—only the color differs. Once green scrapers are restocked, this notice will be removed.

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