Hi and thanks for this great resource. I purchased a beautiful Purslane with pink and white striped flowers... looked like peppermint. Was in a small plastic hanging basket. I repotted into large basket, and mixed in a slow release fertilizer, as I have always done. Two weeks later, only a touch of white on edges of flowers. Is this because of the fertilizer? Because it is getting more sun than before? Or are they known to just revert as they age? Is there a way to hold the variegation? Zone 7. Pic is when purchased. Will try and take and upload current, but just imagine pink flowers with barley touch of white on edges of petals. Thanks!