Grow Earlier, Longer, Smarter
Practical cold frame guidance for home gardeners — from first build to season extension success.
12+
Build Plans
30+
Crop Guides
5
Seasons Covered
100%
Gardener-Tested
Simple Tools, Serious Results
Cold frames aren’t just mini greenhouses — they’re smart, passive climate controllers that extend your growing season without electricity or complexity.
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Built by gardeners, for gardeners who grow with purpose.
About This Guide
Real Gardening, Not Glossy Theory
Cold Frame Guide began in 2019 as a resource for backyard growers tired of overcomplicated advice. We test every tip, build every frame, and track results across multiple hardiness zones—from Zone 4 to Zone 9. No sponsored gear. No affiliate links. Just data-driven, hands-in-the-dirt experience.
- 1 Research-backed recommendations — tested in real gardens
- 2 Step-by-step photos and materials lists — no assumptions
- 3 Seasonal calendars tuned to regional weather patterns
What Growers Say
“My spinach was ready two weeks earlier — and survived three April frosts! The ‘vent timing’ chart alone saved my seedlings.”
Morgan Lee
Home Gardener · Portland, OR
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