Plant some weeds in your scene! 

Pineapple May Weed is a common weed found in pavement cracks, waste land and disturbed soil in temperate areas of the world. Also known as wild chamomile and rayless mayweed, its botanical name is Matricaria discoidea. 

When crushed, the flowers and foliage emit a strong pineapple-like aroma, giving the plant its common name.

Although not native to Europe and North America it has become an established wild plant in both continents, originally from Siberia, its seeds seem to have been spread widely on the wheels of carts, cars and wagons, and readily germinating where they land.

One plant and its instances can look like many different ones with small adjustments to scale and y rotational values.
These plants are low resolution and suitable for instancing. 

Perfect for placing in foregrounds as a weed, put in the cracks in paving, or just in the dirt, either way its pretty little yellow flowering heads looking like tiny pineapples, and smelling the same in its non digital form will add subtle points of interest and realism to any scene!