Woodland Scenics Poly Fiber is a key product here. It’s so versatile - you can tease it out between your fingers to make hedges, or you can roll it into balls and cover it in scatter to make background trees. And you can stick scatter to it with either PVA or extra-hold hairspray. It’s great value too: a bag of it will set you back just £3.50, and you’ll have enough for a layout of this size. Oh, and you can use it for filling in gaps in the scenery and to model creeping plants on building walls.