Solution: Solution: As shown in the figure, the ABCD side length of the ∵ diamond flower bed is 6m, and ∠ b = 60.

△ BMG is a regular triangle,

∴bg=mg；

In addition, the flower planting part in the picture consists of two regular hexagons.

∴GM=GF=EF

∴AF=GF=BG=2，

The side length of a regular hexagon is 2,

A regular hexagon has a convex OE,

So the perimeters of two hexagons are 6×2+6×2-4=20.

∴ The figure circumference of the flower planting part is 20m. ..

So the answer is 20.