Will preen kill off existing weeds in a flower bed?
1157669
It only works on ungerminated seeds. It does not work on existing weeds. You do have to pull those. But it saves you a lot of work in the long run, after the initial weeding. Start early but not too early. Make sure your perennials have started growing so you do not kill them off.
1157670
Preen is a pre-emergent herbicide. It forms a barrier on the surface of the soil that prevents seeds from germinating. It will not kill weeds that have germinated or are already growing. Hope that helps.
1157671
It will not kill off existing weeds. It is a pre-emergent, it keeps seeds from germinating.
1453214
A great Preen product, that does kill chickweed in the lawns is Preen Lawn Stepsaver weed control plus fertilizer - found on Amazon ASIN: B0094KRFO6
1779737
I have a lawn I am trying to kill. But, weeds have taken over also. I used weed & feed to get rid of the weeds. Now I am going to spray the grass.
686291
Yes, they suggest that you spray the area with water to activate the product. We have used this product for two years and find that it is the best for preventing new weeds. It doesn't really help for existing but does prevent new growth.
1153913
This is a really good crabgrass preventer for the lawn but I would not use it in a flower bed. If you want to keep weeds from the flower bed use Preen. You have to make sure the weeds are gone then sprinkle Preen for the first time and from then on, if you continue to sprinkle the beds every three months or so they will stay gone.
671835
I have used this product around all kinds of ground cover and ornamental plants with good results. . . . Not harming any thing but the unwanted grass. However, I have not used it on roses specifically. I wouldn't hesitate to to do so tho. Another equally good product is Ortho Weed-Be-Gone.
1165676
Yes it will kill everything , you need Scott's or roundup that kill weeds and not lawns
578694
It killed mine in the southeast region. It kills a lot of weeds, but not the grass. My grass looks great as it is able to fill in without all the weeds taking over. It even appears to be more green after usage. 1 bottle has lasted me 2 summers so far. Great product! I will buy again!
2234677
This product is non selective. It will kill both of the grass and weeds. The Weed B Gone Clover is not very effective to kill the weeds. Does anyone know the more effective weeds killer that the professional lawn care services use?
1120812
Yes it will, but be careful of overspraying on to other plants/grasses as it could kill them too.
1937813
It's powerful but not that powerful. Try vinegar to kill the weeds then maybe this will get them out after they're dead.
35704
It will kill everything, it's very effective. I put it in a sprayer and spot spray all my weeds in and around the plants I want to keep. But if you get them on the ones you want, it will kill them too. Be careful.
1202263
Not to my knowledge and I've used it for years. Preen is specifically designed to prevent seeds from sprouting by preventing their roots from growing. I have a number of bird feeders in my yard and I can really see the difference if I don't use it. It doesn't even bother my dahlias or other established perennials. Just don't use it if you've recently planted anything that's small seeds, I wouldn't use it until they've popped up well through the soil. Anything a couple of inches down should be okay. Dont forget to reapply Preen after another 8 or 9 weeks to keep any new weed seeds from sprouting and you should be weed-free for the season. Not to my knowledge and I've used it for years. Preen is specifically designed to prevent seeds from sprouting by preventing their roots from growing. I have a number of bird feeders in my yard and I can really see the difference if I don't use it. It doesn't even bother my dahlias or other established perennials. Just don't use it if you've recently planted anything that's small seeds, I wouldn't use it until they've popped up well through the soil. Anything a couple of inches down should be okay. Dont forget to reapply Preen after another 8 or 9 weeks to keep any new weed seeds from... » Read More Not to my knowledge and I've used it for years. Preen is specifically designed to prevent seeds from sprouting by preventing their roots from growing. I have a number of bird feeders in my yard and I can really see the difference if I don't use it. It doesn't even bother my dahlias or other established perennials. Just don't use it if you've recently planted anything that's small seeds, I wouldn't use it until they've popped up well through the soil. Anything a couple of inches down should be okay. Dont forget to reapply Preen after another 8 or 9 weeks to keep any new weed seeds from sprouting and you should be weed-free for the season. « Show Less
1202262
Not to my knowledge and I've used it for years. Preen is specifically designed to prevent seeds from sprouting by preventing their roots from growing. I have a number of bird feeders in my yard and I can really see the difference if I don't use it. It doesn't even bother my dahlias or other established perennials. Just don't use it if you've recently planted anything that's small seeds, I wouldn't use it until they've popped up well through the soil. Anything a couple of inches down should be okay. Dont forget to reapply Preen after another 8 or 9 weeks to keep any new weed seeds from sprouting and you should be weed-free for the season.
301114
Probably not - this is a high-end professional spray and designed to kill brush, but would probably easily erase your grassy weeds and your zoysia!
484687
Look for Preen Vegetable garden Weed Preventer. It is designed especially for this use and is organic. It also provides nutrients for vegetable plants. It will not stop established weeds from emerging, but sure works wonders at preventing new weeds from taking over. This product does list many vegetables that it can be used for, but I prefer the other product around the veggie garden.
1993550
I have used it mainly in the perennial flower bed--it works well there. I don't know how it works on weeds in the lawn.