It doesn't matter how beautiful conservatory is, if it doesn't have any plants. Plants are living creatures bringing life among stone, glass and metal. Plants breathe, grow, flower, reproduce and attract insects.
Planning arrangement of plants is art that can be learned. Primary source of information are books, web sites, lectures and different events where specialists meet. Knowledge, we gather in this way, can be used at choosing, buying and planting plants. But, when we start planting we should listen to plants not only work by the book. That will make them grow happily and richly.
Conservatory develops through time. Plants grow and need more space, diseases and other troubles appear, flowers bloom, fruits mature and vegetable grows exuberantly. We must take in account that there is always work with plants. We must enjoy working with plants. If we do not, then we should not have conservatory.