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Clear portable greenhouse with steel frame and roll-up windows, 70.75 by 35.5 by 35.5 inches

tuphen

tuphen Clear Steel Trellis 70.75" x 35.5" x 35.5

SKU CH-56G1-BZ6ZM

A portable steel-frame greenhouse with two 140 GSM PE covers, roll-up windows and 85% light transmission

  • TypeTrellises
  • ColorClear
  • Frame MaterialSteel
  • Double-layer cover maintains humidity and blocks UV while transmitting 85% sunlight
  • Two 140 GSM PE covers let you add insulation when temperatures drop
  • Roll-up mesh and plastic windows sized 27.25" x 46" and 23.5" x 19.75" give adjustable ventilation
  • Sloped steel frame sheds rain and anchors into soil for wind stability
  • Compact 70.75" x 35.5" x 35.5" footprint extends the growing season in small spaces

Compact Steel Greenhouse

The tuphen Clear Steel Trellis is a portable greenhouse built on a steel frame with two interchangeable PE covers. It measures 70.75" L x 35.5" W x 35.5" H and provides a protected environment for seedlings and mature plants alike. Gardeners seeking a lightweight, walk-in structure for seasonal extension will find the dimensions suit small yards or patios.

Double-Layer Climate Control

A 140 GSM PE cover transmits 85% of sunlight while shielding crops from UV scorching and retaining humidity. During warm months a single layer suffices; a second cover adds insulation when temperatures drop. Zippered roll-up sidewalls and two windows — one mesh at 27.25" L x 46" W and one clear plastic at 23.5" L x 19.75" W — allow precise airflow management.

Upgrade From Cold Frames

This unit replaces basic cold frames or open beds where wind and temperature swings limit early sowing. The sloped roof prevents cover sagging and the extended ground edges can be buried for extra stability in exposed sites. Growers who need a larger footprint or permanent glazing should look elsewhere.

Highlights

  • Double-layer cover maintains humidity and blocks UV while transmitting 85% sunlight
  • Two 140 GSM PE covers let you add insulation when temperatures drop
  • Roll-up mesh and plastic windows sized 27.25" x 46" and 23.5" x 19.75" give adjustable ventilation
  • Sloped steel frame sheds rain and anchors into soil for wind stability
  • Compact 70.75" x 35.5" x 35.5" footprint extends the growing season in small spaces

Specifications

TypeTrellises
ColorClear
Frame MaterialSteel

Questions about this item

How much heat builds up inside the 70.75" steel frame greenhouse when the 140 GSM PE cover runs all day?

The cover lets 85% of sunlight through while blocking UV, so daytime heat rises but the roll-up sidewalls and 27.25" x 46" mesh window plus 23.5" x 19.75" plastic window vent excess warmth when opened.

What must I already have on site to assemble and anchor the 35.5" W x 35.5" H greenhouse?

You need a level soil area at least 70.75" long, basic tools for the steel frame, and the ability to bury the extended ground edges for wind stability.

Will the 140 GSM PE cover and steel frame withstand the same wind loads as my older polycarbonate cold frame?

The sloped top prevents sagging and burying the ground frame adds stability, but the PE covers and steel tubing are lighter than rigid polycarbonate panels.

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