Greenhouses for Homeowners and Gardeners (NRAES-137)

Peer-reviewed NRAES home-greenhouse handbook with a dedicated pit greenhouse section and a 10'×16' pit greenhouse plan; distinguishes full pit vs semi-pit hillside designs. Pit greenhouse built partially below ground uses earth to keep cool in summer and warm in winter; ground temperature 3–4 feet below surface remains fairly constant, around 50°F most of the year, so only a small amount of heat (often a small electric heater) is needed. Disadvantages: more expensive to build because soil must be supported by concrete walls; drainage important — irrigation and ground water must be removed via exterior drains around footing and interior drains; access often requires steps cut into soil. Semi-pit on south-facing hillside: partially/fully glazed south wall for more light; easier downslope drainage; door in front glazed wall at floor level; slight heat-loss increase offset by access and light. Appendix plan: traditional 10'×16' pit with walls buried 4 feet below grade; concrete block or poured walls on footing; interior and exterior drainage to keep floor dry; frame anchored to wall; polycarbonate or other glazing options noted.

Published June 2000 — practices/costs may be outdated; fair-use PDF notes economic data may have changed.

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