Grass Around Raised Beds, How high....

bob_in_coloradoMarch 24, 2012

... To prevent the grass from growing up in the beds?

I'm raising the bed height so the top of the top board (redwood), is about 7-9 inches off the ground. My beds are surrounded by lawn tho. Is this high enough to prevent grass from growing up through the beds?

Thanks All!

Thank you for reporting this comment. Undo
david52 Zone 6

It depends on what kind of grass you have. If there is any brome grass, it will still get through. I have all kinds of raised beds, and every spring, I run along with a sprayer full of roundup and nuke a 6" strip on the outside of the raised beds.

With an added benefit that I don't have to trim the grass, just use the normal mower.

    Bookmark   March 25, 2012 at 10:36AM
Thank you for reporting this comment. Undo
bob_in_colorado

I don't mind te trimming. It's just normal Kentucky blue.

You use Roundup that close to your beds? I'm paranoid about that. I don't use any chemicals within a few feet. Is Roundup safe that close?

    Bookmark   March 25, 2012 at 10:42AM
Thank you for reporting this comment. Undo
david52 Zone 6

Bob, I have 3 acres to try and keep under control, about half that border is raised beds, so if I were to trim that by hand every few weeks, it would be a considerable amount of work. I use roundup around the flowerbeds. I just wait until a calm day and hold the nozzle about 2 inches from the ground - there isn't any drift.

    Bookmark   March 25, 2012 at 7:52PM
Thank you for reporting this comment. Undo
Skybird - z5, Denver, Colorado

Roundup only damages things that it gets on the foliage of, Bob, so, as David said, as long as you do it on a day when there's no wind you can use it right up against other things without hurting them. Roundup in the soil doesn't hurt plants--at least not the normal amount you'd use when spraying. And if you've used RU in an area you can pretty much plant new things as soon as it's dried on whatever you sprayed--tho I'm inclined to wait a day or two just to "be sure."

I don't think KBG would make it up thru 7" or more of soil, but if you happen to have any bindweed growing in your grass, that will go thru just about anything. If no bindweed or other tap-rooted things, like thistle, it seems to me you should be fine. A couple inch "buffer" like David uses seems to me it would make the lawn "upkeep" over summer a lot easier.

Skybird

    Bookmark   March 25, 2012 at 10:19PM
Thank you for reporting this comment. Undo
highalttransplant(z 5 Western CO)

Um, I am here to tell you that, yes, Kentucky Bluegrass will easily grow through 7" or more of soil. Spent the whole afternoon yesterday, digging it out of my veggie bed, and one of the perennial beds. Still have 4 more to do. I dug down a good 8" or more, and was still finding roots coming into the bed from the lawn at that depth. You could try putting a weed barrier at the bottom of the raised bed before you add the soil.

My property is completely infested with bindweed, but I spend almost just as much time eradicating the Kentucky Bluegrass out of the areas I don't want it to grow, as I do dealing with the bindweed.

Not comfortable with the Round Up near the vegetable bed, but maybe there is an organic option I haven't thought of yet.

Bonnie

    Bookmark   March 25, 2012 at 10:42PM
Thank you for reporting this comment. Undo
bob_in_colorado

Thanks everyone!

I now Roundup is a foliar thing, but plants absorb it, then die and decay. Those chemicals then get into the soil do they not?

I pride myself on having a garden with no chemicals nothing that's not natural. I don't even use fertilizer. I won't even use miracle gro.

    Bookmark   March 26, 2012 at 9:59PM
Thank you for reporting this comment. Undo
david52 Zone 6

You can get pretty much the same benefit by using a heavy mulch around the outside of the raised beds.

    Bookmark   March 27, 2012 at 10:59AM
Sign Up to comment
More Discussions
Slice of Pi for Your Birthdate ت
My birthday is the 88,173 digit of pi! ت Do you want...
digit
Eating my Poppies
I know, poppies are supposed to be one of those plants...
blueiris24
Raised Bed - How to Deal with Dogs
We purchased a house a couple years ago that had a...
Sean Hull
The South Window
And, the greenhouse bench: Steve's digit
digit
Any Denver metro area nurseries selling seed potatoes?
I am hoping to grow potatoes this year, first time...
oakiris
Sponsored Products
Red Train Tall Folding Bin
$14.99 | zulily
Dogit Two-Ply Nylon Leash - D0321
$12.99 | Hayneedle
Serena & Lily Claremont Tufted Headboard
Serena & Lily
Olivia Queen Bed Frame in Black
$359.00 | LexMod
Emerald Home Ladderback Upholstered Side Chair - Linen - Set of 2 - EMER822
$299.98 | Hayneedle
Dogit Faux Leather Leash - Venezia - XS - D0753
$12.99 | Hayneedle
iRobot Roomba 880 Vacuum Cleaning Robot
$700.00 | FRONTGATE
Shangri-La Comforter Set
$64.99 | zulily
© 2015 Houzz Inc. Houzz® The new way to design your home™