Roundup on grass going to seed???

Question

I recently sprayed roundup on some grass that has over grown a planter area. The grass is some form of bermuda I think. It was in the process of "going to seed", to the point that touching the stalks would drop the seed. The grass has died, as expected, but I was wondering if the roundup would keep the dropped seed from germinating at some point. Currently the only things in the planter are various Iris's.... I couldnt find anything on the label regarding its effect on seed, dropped or still on the stalk.

I'm in warm and sunny SoCal, if it matters. If the seed isnt effected by roundup, and aside from spraying again when the seed germinates, any suggestions??

Answer 1

Roundup does not affect the seed. There are some pre-emergent products you can buy to try to keep it from germinating, but they only work so-so. The real trick is to catch the weeds before they go to seed, or to just grin and bear it and yank them out by hand if they've already seeded.

Answer 2

If your going to rush around which it sounds like you are, your seeding program is not going to work and you will be unhappy in the end. You can't rush around when you are seeding a lawn and it needs to be done the right way. First off you need to get rid of the existing weeds with the roundup. There should be no need to hurry up and do it on Sunday if you haven't even treated the weeds yet. Step back, take a deep breath and do it right or you are waisting your time. Re-evaluate your situation and move on it accordingly... ...$Billy Ray$

Answer 3

Number one: "pre-emergent herbicide" does not exist. Pre-emergent itself is a chemical to prevent germination as long as the chemical is in the ground! Typically an 8 month to annual application. There is no product designed to kill seeds before germination. only preventitive applications exist.
As far as pre emergent working so - so, depends on what you buy. The selective pre - emergence bought from home depot could not even begin to be compared to a pre - emergent product like "PENDULUM". Check the MSDS label to ensure the product includes what it is that you want to prevent.

to answer the question:
Let the seeds sprout. yes, let the unwanted grass, weeds, whatever grow. once they are rooted, then apply a post emergent herbicide, (round-up), and it will then, and only then, kill the root rendering the seed dead. This can take more than one application and a good point to note is once undesireable grass, weeds are sprayed, kill the water to them for 24 to 48 hours.

Answer 4

round up will not kill any seed that has survived it is a herbicide that just kills the plant. what you need to do is apply a preemergent herbicide to kill the seeds, but whatever survives the preemegent once it sprouts hit the new sprouts with roundup if you dont want to use a premerge then wait for any new spouts to come up and spay them with rounup one thing about preemergents is that they might effect anything you might plant from seed for several months