thicket, bush, underbrush, grove
薮 centers on dense, tangled vegetation: a thicket, bush, underbrush, or small grove where plants grow closely together.
薮 is a simplified form of 藪. It combines the grass radical 艹 with 数, which likely contributes a phonetic element while the grass radical indicates vegetation.
The grass radical 艹 sits on top of 数, like countless blades of grass and tangled plants forming a dense thicket.
For ソウ, imagine a thicket so dense that you need to sew your way through it: sew -> ソウ, as you push through the underbrush.
Liriope minor (flowering plant in the Asparagaceae family)
thicket; bush; clump of bushes
holiday granted to servants on the 16th of the first and seventh months
Japanese beautyberry (Callicarpa mollis)
East Asian pollia (Pollia japonica)
thicket
to only make work for oneself; to stir up a hornet's nest; to put one's foot in one's mouth
European hare (Lepus europaeus); brown hare