Design of negative one floor garden

Quick answer：

The design of a negative one floor garden typically refers to the landscaping and architectural planning for an area below ground level, often found in basements or subterranean levels. This type of garden design requires careful consideration of structural integrity, ventilation, lighting, and temperature control. It often involves the use of artificial lighting, heating, and drainage systems to create a habitable space. Key elements may include indoor greenery, water features, and seating areas. Challenges include ensuring the space is visually appealing while also being functional and safe.