I wanted to add this small pic. I'm very organized when i do this kind of testing so since i wont fertilize anything till i have all the information i need from the current quality on all plant types I'm just getting to the first evolve. I noticed besides the sparkle and the evolve option when looking at the options there is also this DNA sequence shown on the info panel when they are ready to evolve. So if your having issues making sure you evolved everything in a huge garden you can just mouse over to see the evolve icon.
Also on top of evolve being instant it can be done from pause so you can pause your game when a big garden is ready and just evolve away and not lose track of your sims while doing this.
I do have a lot with a way to full garden I'll show off later. It was so big before the patch It took my sim 2 days to water everything along with the gardener. After I finish all these tests I'll load that up and see how the changes effect the gardening there. I did note that there were changes to the footprints of some of the plants so the spacing on some gardens will change.
https://scontent-mia3-2.xx.fbcdn.net/v/t1.0-9/35645514_10204994127850639_4962781835185618944_n.jpg?_nc_cat=0&oh=ddc2286b7c98d1ccf28aef142127b096&oe=5B9F66DF