Hotbed & Propagating Frame
€12,00
Hotbed & Propagating Frame
€12,00
Get a head start on the garden with this heated propagating frame — a hotbed — from a 1964 USDA / University of Maryland Extension plan. It's a low 6'-0" square frame on a 1×8 base: three ½" thin-wall conduit arches bent to 120° at the ridge and eaves, 2×2 end frames under a 2×2 ridge, and clear plastic on the ends. The two side covers are welded-wire mesh wrapped in plastic and tied loosely to the ridge with cord, so you can lift them on warm days to vent and harden off the plants and drop them at night. A 360-watt soil-heating cable in the bed warms the root zone, so you can start seedlings weeks before the frost is out of the ground.
At a glance
- Size: 6'-0" × 6'-0", ~3'-4" to the ridge (183 × 183 × 102 cm)
- Skill: Beginner
- Build time: 1 weekend
- Materials: approx. US$120–300
- In the plan: 18-page PDF, US Letter, 21 illustrated steps, imperial, with metric in the lists and steps
Inside the 18-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 Propagation Station
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 5971, 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
Hotbed & Propagating Frame
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 Propagation Station
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. 5971
From the archive
USDA 5971 (University of Maryland Extension · 1964)
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 — conduit, plastic, and a soil-heating cable; treat all wood.
Questions about this plan
What are the finished dimensions?
6'-0" × 6'-0", ~3'-4" to the ridge (183 × 183 × 102 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 beginner. Expected build time: 1 weekend. Each step names the tools it uses, so it's written for first-time builders.
How much does it cost to build?
Roughly US$120–300 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 or handsaw, Tin snips, Hammer, Drill/driver + bits, Staple gun, Pliers, Paint brush, Conduit bender (or buy bent), 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 5971 (University of Maryland Extension, 1964), 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?
Yes. 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 propagation station (plant propagation & season extending), showing what changes and what stays the same.
What do I get?
An 18-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.