kbg vs the rye/fescue/kbg blends
17 years ago
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- 17 years agolast modified: 10 years ago
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In a KBG/Rye/Fescue blend lawn- will fescue outcompete?
Comments (7)If you water once a week (an inch each time), the KBG will definitely outcompete the fescue as it spreads via rhizomes. If you water less often, the KBG will go dormant and you'll have a mostly brown lawn with clumps of green grass where the fescue is. Then, in the fall and spring, when there's enough water for the KBG, it'll spring back and fill in and outcompete the fescue. If you want a grass that can handle very little water and spread through the lawn when the KBG is suffering, something like streambank or western wheatgrass (both natives) or Roadcrest or Ephraim crested wheatgrass (imported from Siberia) may do it. Note that most varieties of crested wheatgrass are bunch grasses. There may be others that are rhizomatous, but I know the two I listed are. Buffalo grass will spread via stolons, but I think it would be a mistake to try to plant it into an existing KBG/Fescue lawn. Buffalo grass does best during the heat of the summer and will probably be dormant from late September through mid May (I'm assuming you're in the Salt Lake valley; if you're around St George, it'll have a much longer growing season)....See MorePennington Tall Fescue vs KBG (Mass, zone 7)
Comments (16)>>KBG was less drought tolerant than TTTF. It is, very much less drought tolerant. KBG will show wilting long before TTTF will. KBG is more drought resistant than TTTF. It simply goes dormant, waiting for the rain to return. TTTF, left dry, will eventually just up and die. So will KBG, but 1/4" of water every 2 weeks is enough to keep the roots alive. Dormancy can continue for 12 weeks, but losses will start to mount. 8 is the usual maximum given, although I've seen it go a lot longer than that with that incidental watering every now and again. That having been said, my established KBG has been watered twice this year. So much of this is related to how you treat the grass and how you treat your soil. I've pushed mine to very high organic matter levels, which store water like nobody's business and won't let it go easily to evaporation (but a root can exert enough ionic pull to grab the water with no problems). I attached pictures of my lawn (follow the link to my blog as you can see the entire history if you wish to peruse back that far). It's hardly shabby, but this is not a good year. We've ping-ponged between bone dry and soaking wet. >>I water just enough to keep it alive. From March to May it was absolutely beautiful deep dark green but right now it's much lighter and even tan in some spots. Ditto. Keep in mind, I'm somewhat north of you, just a wee little bit. I'm not sure if KBG would be a good choice for North Carolina. >> I will need to overseed this fall so would overseeding KBG into the TTTF lawn be a good idea? Would this eventually lead to a full KBG lawn? I'm open to ideas. The two don't argue with each other directly, so that's not an issue. The KBG, if well-fed (we're talking 4 to 6 pounds of nitrogen per thousand square feet per year) will fill in holes as the TTTF dies out from age. That process isn't fast; there are certainly thirty year old TTTF tufts out there, I've seen some. Growth rates will differ, almost certainly, so that may drive you crazy. Color is going to differ, and the look of the grasses is very different as well. I never felt that tri-mix (fescue, rye, KBG) was a good choice for anybody, but they do that to get one grass to grow in an area, at least. Again, I'm not sure about KBG that far south. Lexington, from the map, feels like it should be OK-but-borderline, and your altitude (800 feet+) speaks well for putting in KBG. Current temperatures and overall average temperatures are fine for it, and KBG when established in good soil should stay green all winter (mine does up here). Rainfall levels are perfectly acceptable. By the way, you have rainfall moving in. Best grab an umbrella for later this evening. If you absolutely forced me to pick three modern cultivars, I'd go with Midnight, Prosperity, and Boutique. You can freely substitute Midnight II or Midnight Star for Midnight, they're all close enough. Those are three extremely dark cultivars, so consider that before you do this. When mature, they'll have that thundery dark green look that my lawn has in spring and fall (all grasses lighten in summer).. Also, tolerance for weather their first year isn't as good as it will be later on (true of any grass), so watering the first summer will be required. I never recommend dormancy the first year if it can be avoided, and if it can't, keep it short. The grass doesn't have the root depth and resources it will later on. Here is a link that might be useful: My Blog, With Photos...See MorePossible to overseed a perennial rye lawn with KBG?
Comments (2)You can, but it might not do very well. If there's a lot of established rye, it may interfere with the new KBG getting established. There has been some research showing that once rye gets established, it has some allelopathic properties that inhibit other grasses getting established. If you overseed an existing lawn, first gradually mow lower, bagging the clippings, until you're mowing as low as you can. If possible, core aerate the lawn. After seeding, water 3x a day for 10 minutes each time for at least 3 weeks to give the grass a chance to germinate. Then gradually cut back on the frequency and increase the length of each watering cycle until you're watering once a week and applying an inch of water at a time. Delay mowing as long as you can after seeding. It takes KBG about 3-4 weeks to germinate and you want to give it some more time to get enough roots in so that the mower won't suck the grass out of the ground....See MoreWhat height should a combo Kbg/RYe/Fescue be mowed at in (7a)?
Comments (1)I'm always amused at the university recommendations for mowing height. If you read the studies they will recommend something like 2.54069135 inches. Well, my mower doesn't have a notch for that height. Grasses seem to become most dense when mowed at a general height. There are three grasses which become more dense when mowed at a low setting. Those are bermuda, centipede, and creeping bentgrass. All three of these are often considered to be weeds in taller forms of grass. All three of these will do great when mowed at the mower's lowest setting. Bermuda and creeping bent look fine when mowed lower than 1/2 inch if you have a mower that will mow with that precision. On a golf course they might be mowed on a daily basis at 3/32 inches high. All the rest of the grasses seem to become most dense when mowed taller. How tall is good? Well, I've grown St Augustine as high as 32 inches (yes, thirty-two), and it looked excellent if you enjoy the look of grass flowing in the breeze. When the city finally twisted my arm hard enough I mowed it with a string trimmer down to 18 inches. When they twisted harder I lowered it down to 12 inches. It became more dense at 12 inches than it was at 32. If I had a regular mower that would do it, and a wife who would tolerate it, I would mow St Aug at 9 inches. As it is I mow at the mower's highest setting and skip a week or two mowing the St Aug. Weeds have to be mowed weekly in my lawn. For other grasses (turf type tall fescue, KBG, rye, zoysia), taller is better. Tall grass develops deep, drought resistant roots. How tall is perfect for those grasses? I don't really care, but you cannot go wrong with mowing at the mower's highest setting, so that's what I profess. If you want to come down a notch below that height, well, I can't come though the screen and choke you, so go for it. Dense grass is good because it keeps the sunlight off the soil. It also keeps rain and hail from smashing into bare soil and forming a crust. Tall grass is good because it tends to generate deeper and longer roots to resist heat and drought when it comes. For simplicity's sake I limit my advice to the lowest setting and the highest setting. The real research is mostly all over the place but within the same lowest and highest general guidelines. To me it's not worth the energy of fine tuning it beyond that. It's grass....See MoreRelated Professionals
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