Glasshouse
A glasshouse is a machine for borrowing somebody else’s climate. These guides cover the great ones — Victorian palm houses, modern biomes, orchid and desert houses — and what they reveal about growing plants outside their range. The interesting part is rarely the glass; it is the decisions underneath. How much of the year is spent heating rather than growing. Why a “tropical” house is really a humidity problem, not a temperature one. Why citrus historically lived in a frost-free limonaia rather than a warm one, moved out every spring and back every autumn in pots. That pot-and-move system is the single most transferable idea in here: you do not need a building to overwinter a tender plant, you need somewhere frost-free and the discipline to move it twice a year. See Kew and the Eden biomes.
