This post is a response to a question Ken Marek asked me on another
hosta listserve. Ken's question follows my answer. I know this is back
asswards....but have you been following Bill's and Chick's discussion??
Subject: Re: round up
I use Roundup at it's regular mixing rate on winter
weeds. I spray right over the dormant hostas.....but...this is before the pips
are up. I use a back pack sprayer and if I see that a hosta has pips that are up
an inch or so I'm careful not to spray directly on the pips. I've heard that
these pips are fairly resistant to Roundup(Solberg)...but I'm not taking any
I have never tried "to saturate a dormant plant" with Roundup. I don't worry about
wind blown residue getting on dormant hosta pips...but I do worry about wind
blown residue (drift) getting on other plants....like on young trees and
evergreens....ferns...or anything green. Yes, even the cambium of young trees
and shrubs can be killed by Roundup.
When applying Roundup I try to get the leaves of
the weeds wet. Not dripping wet....just wet with no run off.
I have also mixed the pre-emergent Surflan
with Roundup and applied both in one application. I use 2oz. of Surflan in four
gallons of water...along with 11 oz. of Roundup in that same 4 gallons of water.
I try to apply this 4 gallons evenly over 1,000sq. feet. If you do use the
Surflan...make sure you keep your mix agitated well...the Surflan can settle in
the bottom of your tank and your application rate will vary over the 1,000sq.
ft. area. The Surflan adds an orange color and it's easier to see where you have
sprayed. If you do use the Surflan you need a filter before your
nozzle....because some small flakes of Surflan can and will plug your nozzle
while you are spraying. A lot of good sprayer have filters built right in so you
may have one and not know it. It's annoying to say the least to be all geared up
with 4 gallons of mix on your back...and have your nozzle plug and spray a poor
It takes about four weeks for the effects of a
winter time Roundup application to show. Have patience...as the
temperatures go up...the weeds die down.
Try to spray on a wind less day if you can. It
always bears repeating that proper personal protective equipment be used when
applying chemicals....including Roundup.
Dan & Lu
hey Dan .....
I know we have been over this before, but I have
always struggled with
comparing the info from you zone 6+ and my zone 5
you have previously indicated that you used roundup to kill
weeds ...... yes??
I believe it is your opinion that it
has no effect on hosta pips? ...... I
presume that means you have never tried
to saturate a dormant plant ........
do you spray indiscriminately ......
or rather carefully ..... are you not
concerned with windblown
when do you do it? ...... and this is the crux of the problem
probably are doing it right now ....... but it is really cold up
here in the
frozen north .....we are having a few warm days......but still a
frosts...... and I presume we are due for one final major storm
what is your opinion on how fast the roundup is taken up in this
weather ........ if I had a 40 degree day ..... and enough time for
roundup to dry .... will the plants take it up, perhaps slower than
would in hot weather ... should I be doing it now, while I am sure the
are still completely dormant .....
please try to put your self
in my zone, and give me a definitive answer
..... as best you can