If I put Preen down on existing weeds then cover the area with weed cover paper then top with stone, do you think it will deter from having weeds?
358910
Preen doesn't kill existing weeds. It prevents new ones from germinating. It prevents weed seeds in your soil or mulch from growing and becoming weeds.
358911
You have to pull existing weeds then add the Preen. Follow the directions on the back of the bag.
358912
N0. Preen will not kill weeds, it will only keep weed seeds from germinating. First kill the weeds with Roundup, then put down weed cover paper, then top with stone, then put Preen on the stones to keep new weeds from germinating. After that, hit any new weeds with Extended Control Roundup until the end of your growing season. Then put down Preen in spring about two weeks before you expect any weeds. One Preen application in the spring each year should be enough unless you live in a wet area. If you are in a wet area, a second application in July may be necessary.
358913
Preen will only prevent seeds from germinating. Good weed cover paper will in most cases smother the existing weeds. To make sure you can use a herbaside such as roundup to rid the area of germinated weed seeds. that weeds that have germinated.
358914
In my experience Preen will have no effect on seed already sprouting but will keep other seed from growing. It gets frustrating watching weeds come up but you must remember that Preen is good, but only on weed seed.
1353456
Yes. It has to be put on consistently. Our sprayer missed a bunch. where it covered-killed all weeds. Great stuff-much more potent than you buy in stores.
953837
Hi! To my experience, the Preen Weed Preventer can be used practically anywhere. I have used it all over my lawn, and flower beds some of which are around a couple of mature trees. No ill effects--so far, and it has been 3 months. This product is magic to keep weeds from invading my garden. Good luck, Sadie's Mom.
2134090
No. Landscape fabric is buried to stabilize the soil or provide a weed barrier. It works by preventing anything from growing through it. The Curlex allows grass to grow through it, but prevents erosion by trapping the seed and soil underneath it.
2054920
Weed barrier cloth from any hardware store works well. If you're in a damp location, dig out about 2" -4" of the sub-surface and fill it with gravel or drainage rock before putting the fabric down.
925995
No - it works best on a permanent path such as gravel or brick. Also, deep rooted plants like dandelion are not always killed by flame weeding.
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
1896718
I could tell you that you should be identifying the exact weeds you want to control and keeping track of your local weather and soil temperatures etc. but....The stuff is pretty effective for a good 4 months and controls some weeds out to 6 months. I would just make sure I put it out at least 2 weeks before typical germination of the weeds you are trying to control, and even if you end up putting it out 2 months early, it is still going to be pretty effective. You could do 50% (max annual rate) for Summer weeds and again for winter weeds later in the year.
1760442
Sorry, I have river rock in the yard and pesky wild geranium that spreads. Did an OK job, but I think the weed is winning.
1346038
I would not, after 18 months i had to replace a tree, pulled rock back with the weed barrier, extremely strong, grass on top would probably grow but would defeat the purpose of the weed barrier
1436034
great question. I applied this product a day prior to a rain storm. after the rain storm I noticed that the rain did not dilute the effectiveness of this product. exactly a week later all my weeds r all brown and withered away
2283707
The weeds will come back unless you get the roots out. However, it did work really well cutting them down.
1477538
The Preen pre-emergence can be used on weeds 2-3 weeks old; you may be a little late for existing weeds; however I put this down every 3 months to control weeds throughout the summer season. This will really help in July / August when crabgrass and misc. weeds go nuts in the heat.
1346041
Uh yeah, but why would you want to....? It' supposed to retard weeds and anything else. Youd have to put soil on top of it and the plant new grass seed.....
1774742
Yes, Preen prevents germination of seeds (seeds don't sprout and become plants,) so it will work between rocks. When I lived in Arizona, i just used Roundup, because germination of weeds was not as big a problem due to low moisture and rocky soils.
1493317
Honestly not sure. I just cut the grass if it is to high I have to go over the area a couple of times. Lol at the moment I have well maintain weeds. In areas where there is actual grass it guy very nicely
1346042
You could put dirt on top and plant grass but then you would have weeds again.