Riga Heavy Duty Seed Tray

Riga Heavy Duty Seed Tray

The Riga Heavy Duty Seed Tray is a deep-sided, durable growing tray designed for use in Riga greenhouses. At 24" × 16" × 3.5" deep, it provides generous capacity for seed starting, seedling propagation, cutting propagation, or general plant staging — with the heavy-duty construction to handle repeated use season after season.

Key Features

• Heavy-duty construction — built for repeated greenhouse use
• Deep 3.5" sides — accommodates deeper root development than standard shallow trays
• Generous 24" × 16" footprint — fits standard greenhouse bench widths
• Designed for use in Riga greenhouses
• Suitable for seeds, seedlings, cuttings, and plant staging

Specifications

How to Use

• Seed starting — fill with seed-starting mix and sow directly, or use to hold individual cell trays or plug trays
• Cutting propagation — fill with perlite or propagation mix for rooting cuttings
• Seedling staging — use as a bottom-watering tray by filling with water and setting potted seedlings inside
• General plant staging — use on greenhouse benches to organize and contain pots, preventing water runoff onto the bench surface

Frequently Asked Questions

Is this tray compatible with standard cell inserts or plug trays?
The 24" × 16" footprint is a standard greenhouse tray size that accommodates most standard 1020 cell inserts and plug trays. The 3.5" depth means it can also be used as a deep flat for direct sowing without inserts.

What makes this a "heavy duty" seed tray?
Heavy duty seed trays are constructed from thicker, more rigid plastic than standard flimsy propagation trays. They hold their shape when filled with wet growing media, can be reused for multiple seasons without cracking, and support the weight of multiple cell inserts or pots without flexing.

Can this tray be used for bottom watering?
Yes — the 3.5" deep sides make this tray well-suited for bottom watering. Fill the tray with water and set potted seedlings or cell trays inside; the plants draw water up through the drainage holes from below, encouraging deeper root development and reducing the risk of damping off from overhead watering.

How many trays do I need for a Riga greenhouse?
The number of trays depends on your bench configuration and growing goals. The 24" × 16" footprint fits standard greenhouse bench widths — contact us if you need help calculating how many trays will fit your specific Riga model’s bench setup.