Wilderness unleashed addon
Wilderness unleashed boosts the number of vegetation and its variety spawned in Minecraft. And it's not all just grass that is going to fill the emptiness of the fields. New random objects will be incorporated into a patchwork of the world. I'm talking about geodes, dead trees, ponds, tree stumps, flowers, etc. It will only get better if you combine this with the new tree variants addon.
Enable all Experimental gameplay features in Settings.