Expandome

Keeping large greenhouses at constant temperatures can be costly during those parts of the season when sunlight alone is not enough.
So why not design a greenhouse which expands to suit the need?

I want to make an Hoberman hemispherical greenhouse on wheels.
When retracted the folds in the polly will condense and collect water which is gravity fed to the counter-balance weight/ internal water reservoirs which use the weight of the water to extend the individual triangular pantograph sections against spring-powered retractors and expand the dome incrementally as the summer progresses.
The outer garden beds along the inner periphery will also move outwards as the dome grows but because they cannot expand themselves the spaces between the beds grow instead.

Inner concentric garden beds are touching one another with a single walkway through them when the dome is contracted but are also tugged outwards against a slight upwards slope so that walkways appear and widen between them as well.

This would conserve energy at times of the year when the entire greenhouse is not needed and allow taller plants at the center to reach their maximum height and wider plants in other beds the width they need to control fungal infections and still allow easy access for the gardener.

At the end of the season gravity and the spring loaded triangles collapse the whole contraption back to its original germination house size.