Scenery for your...
I am not going to spend a lot of time describing how to make the ground. Two reasons mainly, the first it just takes some practice and the second; I don't spend much time doing it. Not counting drying time, the ground, (building, painting and flocking), and the placement of the trees took less than an hour in this scene shown.
The hassle comes in making sure the board does not warp while drying, choosing colours for the scene, trying to decide on a scene to make, gathering the right scale of pebbles, sticks and flocking in order to make it.
The ground cover is really the 2nd LAST step. Have your buildings, rock work and rivers or ponds painted first. (Pouring water effects on the painted river or pond is the last thing to do on a piece)
Scales? Lots of various Texture
As previously mentioned I won't spend a lot of time here on making ground. The main things to remember are; nature is not neat and it will look good as long as you consider some ofthe natural laws; like gravity and weathering.
Where people get into the most problems, when they are trying to make it look realistic, is using flocking or sand that is to big. Grind it down some or use something different. A mortar and pestle will work, an old spice grinder, old bowl and a heavy spoon,... experiment.
Use a multitude of textures and colors. The more stuff you have the better it will look.
But..., less is more. You need space too.
Be satisfied with the end result as we are always our own worse critic. i.e. the picture here looks good, yes? I made it from brown paint mixed with glue and poured all the scrapings from my work desk on it. What stuck came out looking like this.
Some people hate them, I think they are required. I like the realistic effect. Yes the well painted 'cartoon-color' miniatures and buildings are cool. But, ... I'd rather have it look real. Easier to put myself in the scene, even your girlfriend or wife will want to be small enough to explore on the terrain (probably only the fantasy ones though).
I use a lot of Woodland Senics, but I make my own from various things (dirt (sterilize in oven), dry moss, stale spices, fine sand, chalk dust). If you haven't experimented with weathering using coloured chalk you should.
When I paint my terrain piece I use watered down glue mixed in the paint, and add the flocking while it is still wet.
I start with a piece of terrain that has been coated with goop and dry. The ground is then covered with a thick mixture of white glue and acylic paint.
While this is still very wet I sprinkle flockings on.
Start with little rocks and sticks, then hold the piece on its side and add dark colours for the edges of cliffs and ridges. I next add greens, burnt grass colours, and finally very fine sand and a mixture of ground dirt and brown chalks.
As mentioned add some!
The dried roots of several plants work. Spice it up; raid the stale basil. I like ground up roots of old dead lawn grass.
Keep the sands fine. I have to buy mine as the stuff here has too much mica in it.
Outdoor dirts and sands should be sterilized first in the microwave or an oven.