Charles Potter touts growing flowers and plants in a greenhouse as ""the ultimate refinement of the greatest of all hobbies--gardening."" He discusses materials (plastic or glass) of the modern greenhouse, indispensable or luxurious; framing plants (which need to be compatible), propagating them, dosing them for pests or diseases. Then there are the plants themselves, flowering, fragrant, foliate; potted roses, bulbs, vines. There is a word about planting for cutting and for outdoors, a word about maintenance. Helpful.