On Jan 29, 5:19 pm, "Red" wrote:
On Jan 29, 10:57 am, "dpb" wrote:

Roundup is a selective herbicide and doesn't kill everything. Try a
weed killer containing 2-4-D full strength from the bottle on those
cut back stubs.

Actually, it's the other way 'round -- glyphosate (Roundup, et al.) is
a non-selective, systemic herbicide whereas 2,4-D is a broadleaf-
specific selective herbicide.

Negative! Roundup is selective! Read the label ...

From Monsanto label (http://www.cdms.net/ldat/ld6DP028.pdf)

"Selective broad-spectrum weed control in Roundup Ready crops. Non-
selective broad-spectrum weed control for many agricultural systems."

The non-selective part is only when used with Roundup Ready crops. As
noted, there are some which aren't particularly effective, but it is
definitely (other than as noted) a non-selective herbicide. I'm
presuming OP's Bird of Paradise isn't bred to be Roundup Ready.