Portable Plastic Greenhouse
€15,00
Portable Plastic Greenhouse
€15,00
A graceful little walk-in greenhouse from a 1963 USDA / University of Maryland plan (based on Oregon Plan 73) — the classic gothic-arch plastic house. Five arches stand 3'-0" apart, and each half-arch is simply two thin exterior-plywood bands (1/4" × 4" × 8'-0"): the first is screwed to the base and bent over to the ridge, the second is glued and nailed on top, and the pair holds the pointed curve with no steam or forms. The arches spring from a doubled, treated 1×8 base staked to the ground and meet over a ridge of 1×10 ripped at 30°. Cover everything with plastic film, hang a framed door in each end and hinge the vent flap over each door to open 90° for air.
At a glance
- Size: 8'-6" W × 12'-0" L × 7'-0" tall (259 × 366 × 213 cm)
- Skill: Intermediate
- Build time: 1–2 weekends
- Materials: approx. US$200–500
- In the plan: 19-page PDF, US Letter, 21 illustrated steps, imperial, with metric in the lists and steps
Inside the 19-page plan
- The original public-domain sheet, restored and reproduced in full
- An exploded drawing that shows how every part goes together
- Dimensioned views of the finished build, in feet and inches
- Materials list and hardware schedule, with today's actual lumber sizes and metric equivalents
- Cut list, so you can cut everything before you start assembling
- Clear illustrated step-by-step assembly drawings: one job per step, every part drawn, fastener positions marked
- A modern-build track: screws and today's materials, same dimensions
- The Remix: build it as a Flower Market Stall
The PDF plan is a digital download; nothing ships. The Printed Workshop Edition (PDF included) and the wall prints are printed to order and shipped. Adapted from USDA Cooperative Extension Service plan 5946, a public-domain original. Restored, redrawn and edited by Square & Furrow, produced with AI-assisted tools and checked against the original drawing.
Restored USDA original
Imperial + metric
Cut list & checklist
Instant PDF download
Built to work
Portable Plastic Greenhouse
Drawn by agricultural engineers, proven on working farms, and redrawn for the way you build today.
Rendering
This fall · The Remix
Or build it as a Flower Market Stall
The same proven structure, given a new job in the garden or the backyard. It's included in this plan: a dedicated page shows exactly what changes and what stays the same.
Drawn for the plan
From the USDA archive
Restored from the original plan No. 5946
From the archive
USDA 5946 (University of Maryland Extension · 1963; Oregon Plan 73)
Public domain · restored by Square & Furrow
This is the public-domain sheet the agricultural engineers drew. We restore it and reproduce it in full inside your plan, then rebuild it as a modern edition: today's lumber sizes, metric measurements, a cut list and illustrated steps. Every dimension is checked against the original.
Step by step
Every part drawn. Every fixing marked.
Each step is one job with its own clear drawing: the parts it adds are shaded, every nail and screw position is marked, and the hardware and tools sit right beside it. An exploded view shows how the whole build goes together before you make a single cut.
Before you build
Your tools & materials checklist
Tick what you already have. Whatever is left is your shopping list. Your ticks are saved on this device, so you can come back to it from the lumber yard.
0 of 0 on hand
Tools
Materials
Materials — exterior plywood bands, treated base and stakes, plastic film.
Questions about this plan
What are the finished dimensions?
8'-6" W × 12'-0" L × 7'-0" tall (259 × 366 × 213 cm). The drawings are dimensioned in feet and inches; the materials list, cut list and steps give metric sizes alongside.
What skill level do I need, and how long does it take?
It's rated intermediate. Expected build time: 1–2 weekends. It suits someone who has framed a shed or a deck before; each step still names the tools it uses.
How much does it cost to build?
Roughly US$200–500 in materials at typical US lumber-yard prices. Prices vary a lot by region, so price the materials list at your local yard before you start.
What tools do I need?
Level (4-ft), Circular saw, Sander, Jigsaw, Utility knife, Drill/driver + bits, Staple gun, Hammer, Sledgehammer, plus a tape, pencil, safety glasses, hearing protection and gloves. The interactive checklist on this page lets you tick off what you already own.
Is this an original USDA plan?
Yes. It is restored from USDA 5946 (University of Maryland Extension, 1963; Oregon Plan 73), a public-domain USDA Cooperative Extension Service plan. We redrew it as a modern build guide with a materials list, metric sizes, a cut list and clear illustrated step-by-step assembly drawings, every part drawn. Every dimension follows the original drawing, and the original sheet is reproduced inside.
Can a beginner follow it?
It's rated intermediate, so it helps to have built something framed before, or to have a handy friend on the bigger lifts. Each step is a single job with its own drawing: the parts that step adds are shaded, the nails, screws and bolts it drives are marked where they go, and the hardware for that step is listed beside it. An exploded drawing at the front shows how the whole build goes together before you cut anything.
Can I build it for something other than farm use?
Yes. The plan includes a remix page that turns the same build into a flower market stall (flower stands & market stalls), showing what changes and what stays the same.
What do I get?
A 19-page print-ready PDF (US Letter) to download after purchase. It prints well at home or at a copy shop, and reads fine on a tablet in the workshop.