This reminds me of an informal and very unscientific experiment I read about in the
AOS Bulletin many years ago.Three members of the staff each acquired a plant of Vuyl. Cambria 'Plush', a very famous clone at the time. Each took it home, and grew it under thier own conditions. When they bloomed, they compared the resulting blooms, which showed such dramatic variations, they appeared to be three different crosses altogether. The conclusion was that different growing conditions can affect flowering characteristics significantly.
Kim