Bottom Shelf for Riga 3s: 25" w x 10'4" long

The Riga 3s (IIIs) Bottom Shelf is a purpose-built polycarbonate shelving unit for the Riga IIIs greenhouse — the smaller "S" variant of the Riga III series. Suspended with braces at regular height to allow larger equipment, pots, or supplies to be stored underneath, each unit covers one side of the greenhouse. At 25" deep × 10'4" long, it provides a generous growing and staging surface along the full interior length of one side wall.

*Free shipping only when purchased together with a Riga greenhouse. Ordered separately, an additional shipping charge applies.

Key Features

• Twin-wall polycarbonate shelf surface — durable, lightweight, and allows light transmission
• Suspended with braces at regular height — allows larger equipment, pots, or supplies to be stored underneath
• 25" deep × 10'4" long — covers the full interior length of one side of the Riga IIIs
• Each unit covers one side of the greenhouse — order two for full double-sided shelving
• Purpose-built for the Riga IIIs — engineered to fit the Riga IIIs frame exactly

Specifications

Riga IIIs vs. Riga III — Which Shelf Do You Need?

The Riga IIIs and Riga III bottom shelves share the same dimensions and price. The difference is in the frame attachment points — each shelf is engineered to fit its specific model’s frame. Order the shelf that matches your exact greenhouse model.

How the Suspended Shelf Design Works

Unlike floor-standing shelving, the Riga bottom shelf is suspended from the greenhouse frame with braces at a regular working height. This creates usable storage space underneath the shelf — ideal for:

• Large pots, planters, and grow bags that are too tall for a standard shelf
• Watering cans, fertilizer bags, and bulk supplies
• Propagation equipment, heating mats, and trays stored at floor level
• Wheelbarrows and garden carts that need to slide under during use

Frequently Asked Questions

Does one unit cover both sides of the Riga IIIs?
No — each unit covers one side of the greenhouse only. To shelf both sides of your Riga IIIs, you will need to purchase two units ($499 × 2 = $998 for full double-sided shelving).

If the Riga IIIs and Riga III shelves have the same dimensions, are they interchangeable?
Not necessarily. While both shelves share the same 25" × 10'4" dimensions, they are engineered with frame attachment points specific to each model. We recommend ordering the shelf designated for your exact greenhouse model to ensure a proper fit. Contact us if you have questions about compatibility.

Is this shelf compatible with other Riga models?
This shelf is engineered specifically for the Riga IIIs. Other Riga models have different interior dimensions or frame configurations and require their own model-specific shelving. Contact us to find the correct shelf for your specific Riga model.

Why is the shelf made from twin-wall polycarbonate?
Twin-wall polycarbonate is the ideal greenhouse shelf material — lightweight, durable, moisture-resistant, and allows light to pass through to plants below. Unlike solid wood or metal shelving, polycarbonate won’t rot, rust, or block light in a humid greenhouse environment.

Why is free shipping only available when purchased with a greenhouse?
The shelf ships free when ordered together with a Riga IIIs greenhouse because it can be included in the same freight shipment. When ordered separately, it ships as a standalone item and an additional shipping charge applies due to its size.

Can I add shelving after I’ve already assembled my Riga IIIs?
Yes — the Riga IIIs bottom shelf can be added to an existing assembled greenhouse. It attaches to the Riga frame using the built-in brace system. Contact us for installation guidance if you are adding shelving post-assembly.