husband sprayed weeds around our garden with Zero and some got on
our penstemons. Will they live?
your photo it looks as if there are still plenty of green leaves
on the plant, so it's likely the plant hasn't received enough of
the active ingredient glyphosate to kill it. I recommend you cut
all the discoloured shoots back to where there are healthy green
leaves, even if you have to cut some shoots right back to the ground.
Give the plant a feed
with a general fertiliser and a good watering if necessary. At this
time of year new growth should quickly appear and you may even get
some flowers in autumn.
Gardener, Issue 143, 2004, Page 26
Reproduced with permission from the former Weekend Gardener magazine. The views expressed here are not necessarily those of the RNZIH.