I found that I have to actually click on them to see evolve. My plants do not always sparkle. Especially the ones that are out of season... And I go into buy debug and get 3 grow fruit and plant them. I use the grow fruit that my Sims harvest to fertilize. You can even download grow fruit from the gallery. Yesterday I did evolve out of season tulips that have never grown before. I think they are a spring plant. It did however take almost a full Sim week for the grow fruit to be harvested. As soon as I used it to fertilize I had lots to evolve. Before that the plants where only fertilized with fish or flowers and did not evolve. My oldest plants have been planted about 13 Sim days. It's one day to fall.