My name is Vicente. I´m from Spain. I would like to know, it is possible, the answer for two questions:

1)I have an alone specimen de viola odorata in a pot, since a year. It has good aspect, and a lot of leaves...but any flower. Why it not bloom?, It will be a male plant?????.

2) I have read that, depending on soil and sun conditions the colour of the flower can change to pinkish or iven yellow. Is this possible?

Thanks, and I apologize for my poor english.

1) It is not a male plant - all violets are bisexual.
Violets produce flowers with petals when the days are short - winter and spring. If your plant has had artificial light (even from a street light), it might think it is summer!
Also, a cold period helps promote flowering - so have you kept yours inside the house during winter? Violets should be kept outside (though you can bring them into the house for a short period when they are already in flower).
Lastly, has your plant had too much nitrogen-rich fertilizer or compost? That would give good leaves but it may also reduce the amount of flowers.

2) The colour of a violet's petals is not changed much by sunlight, execpt by scorching when water is on the petals (which can produce almost white areas). Viola odorata comes in many cultivars and natural forms with different coloured petals - white, pink, purple, cream, and many other colours between those.
Soil type/chemistry does not affect the petal colour much, as far as I know (you cannot change between pink and blue by putting iron nails in the soil, like with Hydrangea).

Hope this helps,
Mike

I had read your answer today. It´s a very good help.

Thanks. Vicente.