So now we know the way your planet was created, what minerals are on your fictional planet, what your topography looks like and what your climate zones are. Now we can work on what plants are on your planet and where they are. To do that, pull out that topography map again and look at where your bodies of water are as well as your climatic zones. Plants are resilient little buggers and will grow almost anywhere. It helps if there is plenty of water around or the air is very humid, but plants adapt to climates like the desert and tundra by not needing a lot of water or growing places to hold water over long periods of time. Also, minerals in the soil are needed to combine with other elements around like water and sun to create plant food. The climate, light, and soil are very important for plants and if you plan to transplant certain plants, such as farming or gardening plants, remember that the new environment will be slightly different and the plant will not be the same, whether it be that the plants don’t grow as tall or don’t flower as often or any other difference that may occur do to the difference in the two. For a rather full list of plants humans use for farming and gardening, look here. Just remember as you decide to use Earth-like plants or invent your own that each plant must be successfully adapted to its original location or comment that the plant was unable to survive in the changing habitat it evolved in and people are trying to make it thrive elsewhere.
Once you have your plants decided and located, it’s time to think about your animals and where they belong.