Mighty Fine.....跑色了..........

嗚嗚嗚.....Mighty Fine.....跑色了..........

這花種了差不多兩年..終於開花,卻跑色了..........





在網上查到的形容是
Mighty Fine (B. Johnson) Semidouble white pansy/fuchsia edge. Light green. Standard
source: http://www.africanvioletfun.com/mrsjohn/plantinventory.html
但現在卻完全相反....紫色堇形花,白邊......
請問跑色的原因是什麼?太光太熱 ?
請各位多多指教~