Bottom Shelf for Riga IV: 25" w x 13'10" long

Bottom Shelf for Riga IV Greenhouse

The Riga IV Bottom Shelf is a purpose-built polycarbonate shelving unit for the Riga IV greenhouse. 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 × 13'10" long, it is the longest shelf in the Riga bottom shelf series — providing a generous growing and staging surface along the full interior length of one side wall of the Riga IV.

*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 × 13'10" long — sized for the full interior length of the Riga IV
• Each unit covers one side of the greenhouse — order two for full double-sided shelving
• Purpose-built for the Riga IV — engineered to fit the Riga IV frame exactly

Specifications

Riga Bottom Shelf Series — Which Shelf Do You Need?

All Riga bottom shelves share the same 25" depth and suspended brace design. Length and price scale with each greenhouse’s interior length. 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 IV?
No — each unit covers one side of the greenhouse only. To shelf both sides of your Riga IV, you will need to purchase two units ($624 × 2 = $1,248 for full double-sided shelving).

Is there a separate shelf for the Riga IVs (smaller "S" variant)?
The Riga IVs is the shorter length variant of the Riga IV series and may require a different shelf length. Contact us with your exact model number to confirm the correct shelf before ordering.

Is this shelf compatible with other Riga models?
This shelf is engineered specifically for the Riga IV footprint (13'10" interior length). Other Riga models have different interior lengths and require their own model-specific shelving. See the series table above for other available shelf models.

Why is the Riga IV shelf longer and more expensive than the IIIs and III shelves?
The Riga IV has a longer interior than the IIIs and III models. The bottom shelf is sized to match each greenhouse’s interior length — the IV shelf at 13'10" is 3'6" longer than the 10'4" IIIs/III shelves, which accounts for the higher price ($624 vs. $499).

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.

Can I add shelving after I’ve already assembled my Riga IV?
Yes — the Riga IV 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.