@Kristen-Lango I love these and I think the brussel sprouts are great. I'm trying to learn the patience to bring that much detail to my drawings.
My nature journal is from what I have actually seen but only the plants are directly from life. For the birds and animals, I take photos while I am hiking or kayaking and then draw from those. On overcast days the colors in my photos are not always easy to see so I sometimes have to check field guides to be more accurate. There are people who would consider drawing from any photo, even your own, cheating but I decided a long time ago to ignore rules and do what I like to do. (Besides, Norman Rockwell drew from photos so why can't we?)