Quick Answer:
Designing your ideal greenhouse involves selecting a color that complements your garden and reflects light effectively, building a raised foundation for better headroom and airflow, and choosing durable glazing like twinwall polycarbonate for energy efficiency—ensuring both aesthetic appeal and optimal plant growth.
When buying a new greenhouse, the big news is that whatever you choose, it is never big enough because as gardeners we know how to expand our production to fill our space. That is when my last greenhouse was 16' x 20' and I grew citrus trees in central beds, trays and trays of starter plants on suspended shelves, strawberries in rain troughs sitting on brackets attached to the walls, tomatoes in beds along the inside walls and cucumbers climbing a trellis to the really high roof.