Writing
Notes, essays, and research from Defy Frost.
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Growing Food in an Unheated Greenhouse All Winter Long
Mache and kale survive to 10°F under minimal protection. This is the crop-by-crop guide to what actually grows in an unheated winter greenhouse.
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Cheap Greenhouse Heating: Bubble Wrap, Barrels, and BTU Math
Cut greenhouse heating costs without a furnace. Horticultural bubble wrap, water barrel thermal mass, and a correctly sized heater. Verified June 2026.
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Greenhouse Plastic: Mil, UV Life, and Which Film to Buy
6 mil vs woven, clear vs high-diffusion, 4-year vs 1-year: what the spec sheet numbers mean for your growing season and budget. Verified June 2026.
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Exaco Riga Greenhouse Review: The Snow-Country Kit
What Exaco Riga owners actually report: German onion-arch kits from $5,095 to $23,000, the 8mm twin-wall snow story, and price per square foot.
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Greenhouse Foundation Guide: Bases That Beat Frost
Greenhouse foundation options compared: treated lumber, gravel, pavers, and concrete, plus frost heave, leveling, permits, and computed base costs for 2026.