Don't know which ones to use as there where pink, red and white next to it when it came up and even though those plants are still there no more have come up yet .... and I do water them everyday
Purple roses can spawn from either white and white roses, or red and white roses. Later on, when you get another purple rose, you can start breeding those together to ensure that the outcome will be purple, as white x white and red x white can spawn a number of different colored roses too.