Top Shelf for Riga IIIs: 10" wide x 10'4" long
Top Shelf for Riga IIIs Greenhouse
The Riga IIIs Top Shelf is a purpose-built upper-tier polycarbonate shelving unit for the Riga IIIs greenhouse — the smaller "S" variant of the Riga III series. Narrower and higher than the bottom shelf, it is designed for smaller plants, seedling trays, and propagation work at eye level — with polycarbonate inserts that allow light to pass through to the plants and shelves below. Each unit covers one side of the greenhouse.
*Free shipping only when purchased together with a Riga greenhouse. Ordered separately, an additional shipping charge applies.
Key Features
- Twin-wall polycarbonate shelf surface with polycarbonate inserts — maximizes light transmission to plants below
- 10" deep × 10'4" long — narrower than the bottom shelf, designed for the upper tier of the greenhouse
- Suspended shelving — positioned high in the greenhouse for seedlings, small pots, and propagation trays
- Each unit covers one side of the greenhouse — order two for full double-sided top shelving
- Purpose-built for the Riga IIIs — engineered to fit the Riga IIIs frame exactly
Specifications
| Compatible Model | Riga IIIs |
| Shelf Depth | 10 inches |
| Shelf Length | 10 feet 4 inches |
| Shelf Position | Top / upper tier (suspended high) |
| Material | Twin-wall polycarbonate with polycarbonate inserts |
| Light Transmission | Yes — polycarbonate inserts allow light through to plants below |
| Coverage | One side of the greenhouse per unit |
| SKU | RIGA-IIIS-TOP-SHELF |
| Price | $379.99 per unit (one side) |
| Shipping | Free when purchased with a Riga greenhouse; additional charge when ordered separately |
Top Shelf vs. Bottom Shelf — How They Work Together
| Feature | Top Shelf (this product) | Bottom Shelf |
|---|---|---|
| Depth | 10 inches | 25 inches |
| Length | 10'4" | 10'4" |
| Position | Upper tier — suspended high | Regular height — suspended with braces |
| Light Transmission | Yes — polycarbonate inserts | Standard polycarbonate |
| Best For | Seedlings, small pots, propagation trays | Larger plants, staging, storage underneath |
| Price (per side) | $379.99 | $499 |
Many Riga IIIs growers use both tiers together: the bottom shelf for larger plants and staging, and the top shelf for seedlings and propagation at eye level. The polycarbonate inserts in the top shelf ensure that plants on the bottom shelf still receive adequate light.
Frequently Asked Questions
Does one unit cover both sides of the Riga IIIs?
No — each unit covers one side of the greenhouse only. To add top shelving to both sides of your Riga IIIs, you will need to purchase two units ($379.99 × 2 = $759.98 for full double-sided top shelving).
If the Riga IIIs and Riga III top shelves have the same dimensions, are they interchangeable?
Not necessarily. While both top shelves share the same 10" × 10'4" dimensions and price, 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.
Can I use the top shelf and bottom shelf together in the same Riga IIIs?
Yes — the Riga IIIs top and bottom shelves are designed to work together as a two-tier shelving system. The top shelf sits higher in the greenhouse for seedlings and small plants, while the bottom shelf provides a wider surface at regular working height with storage space underneath. The polycarbonate inserts in the top shelf allow light to reach the bottom shelf and floor below.
Why does the top shelf have polycarbonate inserts?
The polycarbonate inserts allow natural light to pass through to the plants and shelves below. Without light-transmitting inserts, a solid upper shelf would cast shade on everything beneath it — reducing growing conditions on the bottom shelf and floor. The polycarbonate inserts maintain light levels throughout the greenhouse interior.
Is this shelf compatible with other Riga models?
This top shelf is engineered specifically for the Riga IIIs footprint (10'4" interior length). Other Riga models have different interior lengths and require their own model-specific shelving. Contact us to find the correct top shelf for your specific Riga model.
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.