Why my Miniature rose changes the color

Hi, friends! As you know I love Miniature roses and I cultivate the houseplants on my windowsill. Once I noticed: the colors of my flowers depend on sunlight. Today I'd like to tell you about why my roses change the color. 



A few years ago I bought an orange rose with red borders on the petals. I call her "Fantasy rose". This is my plant:

My orange Miniature rose

However this winter the beauty person decided to wake up very early. The rose started a budding in... February. (Usually the plant's bidding takes place in March or even in April). So, my orange rose flowered in March. But the flower had... pure yellow color:

Yellow or orange?

I think it happened because my green friend didn't receive normal sunlight in winter. 

My orange Miniature rose is flowering

When the plant flowered for the second time it gave me orange flower with red borders on petals! 

The rose changed the color not for the first time. She bloomed as yellow flower in last Fall as well. As you know sunlight is not bright in Autumn. 


The orange rose is blooming now! My red "flower queen" is flowering on the windowsill too. My pink and dark red roses are going to bloom.