DIY Greenhouse 4: Cold Frame with an Old Window

A bottomless wooden box with a sloped glass or transparent lid — the classic season extender. Start seedlings 4 weeks earlier, grow spinach and lettuce through winter, harden off plants in spring.

Build time

half a day

Budget

$20–80 (nearly free with salvaged materials)

Size

~0.8×1.2 m

One-time purchase · 1 licence = 1 person. Buying for a team or class? Set the number of licences in your cart.

• Instant download from My library, as many times as you need.
• Opens on phone, tablet and computer. Print the drawings if you like.
• Yours to keep. Terms · Refunds