GREATEST IMPACT ON THE LAWN - HOW & WHEN?

Is proper mowing height an overrated excuse?

How can we build healthy soil for long term success of the lawn?

Chesterfield, VA. When looking for the greatest impact on the lawn for the year, I decided to limit the parameters to change in health, and visual impact. Pre-emergent weed control definitely produces great results with weed control and overall health of the lawn, but does not have quite as dynamic of a visual impact. Aeration paired with seeding is the health and visual impact winner. The ability of aeration and seeding to transform the lawn can make the whole property look completely different in about a month! The benefits to aeration and seeding are immense- opening channels for water, and air exchanges, allowing the roots to be reinvigorated after summer stress, re-establishing areas that may have thinned or struggled in the heat/drought, increasing competition for any weeds that thought they would come into the area and take over, and allow nutrients to enter different soil levels. How does aeration work? Aeration physically opens channels within the soil to allow for air exchange to the rooting zone, the cores come up to the surface to reduce compaction and layering, and we get great seed soil contact increasing the likelihood of success when seeding. When should I aerate? Aeration on cool season lawns generally should be completed as the night time temperatures begin to cool, normally September or October in our area. We are looking for the grass plants to come out of the 24 hour stress during the heat of summer and begin to recover. Aeration and the air exchange created helps the roots get healthy again and repair themselves from the summer months. For warm season lawns, the aeration timing runs from late June through the end of July when the grass is growing most aggressively to heal, that way it is healthy again before the cooling temperatures prevail. How does seeding work? Seeding introduces new plants to the lawn, thickening the stand, reinvigorating a mature lawn with new growth, and the opportunity to add the latest varieties of grass plants with improved disease resistance, pest tolerance, color and drought stress. For those of us with fescue lawns, fescue is a bunch type of grass which does not naturally move laterally to fill any thin areas or gaps in coverage, so we need to annually seed new plants to rejuvenate the lawn. When should seed get planted? Seed needs warm soil temperatures in order to germinate, however it is not very tolerant of high heat once it begins to grow, therefore in this area it is best to plant cool season grass in the September, early October time frame - the soil temperatures are still warm from summer, but the nights are cooler, and the temperatures not as high for as long. For warm season grasses seeding is rarely done, although if necessary in the late spring, early summer so that the new grass gets as many sun days as possible before the temperatures cool. Most warm season grasses are established through springs or sod rather than seed, generally these methods lead to a more successful overwinter or the plants. With these time frames quickly approaching, if you need a big improvement, to reinvigorate or just thicken up the stand of grass - start planning now! If you liked my blog post, share it with a friend! For more information, questions or comments - sign up to share. About me  Sean Welch is the owner/operator of SuperTurf LLC where he helps homeowners in the area improve the quality of their lawns and irrigation setups to achieve the success they desire. He was a formerly a golf course superintendent with a degree in Landscape and Turfgrass Management from Virginia Tech.

Chesterfield, VA. The answer to how often should I water combines several factors - watering requirements depend on the type of grass on the lawn, the type of soil under the lawn, and exposure that the lawn endures. The idea is to water deep and infrequently as possible to force the roots of the plants to grow down deeper, and the surface can stay firmer with less disease pressure. The cool season grasses will require more water than warm season during the summer months. The frequency of watering for cool season grasses - think fescues - is ideally once per week. In the off season, we can get away with once per week, as the summer nears, usually we require twice a week. At this point in the year, say mid June, we see what type of summer weather we get, some years are wet, and some are hot and dry each demands a different schedule. When we get hot and dry, we first take the station watering times up, only adding an additional day if absolutely necessary. Normally irrigation systems are built to supplement nature, but in times of drought and extreme heat, they have to be turned up in an attempt to replace nature. Clay soils hold water longer, but take longer to get the water to penetrate to depth, sandy soils frequently dry out quickly due to the air, and lack of organic matter to hold onto moisture. Loams are the best mix, marrying the penetration of a sandy soil with the organic matter/moisture holding of a clay soil, the best of both worlds. Exposure can be something simple, but not often thought through. Paying attention to which side of the property is south facing, west facing and demands more water due to the excessive afternoon heat, which zones will need to be turned up 10-50% in order to account for that difference. In the same way, areas of low exposure can be turned down, thinking of north facing, or shaded areas not in competition from tree roots. We are looking to apply approximately one inch of water to the lawn weekly. On clay soils that may remain one cycle per week, on sandy soils it may mean 2-3 smaller cycles per week because the soil will not hold the moisture the same way. How do we know how much is 1" of water per week? We can use the catch can analysis test to set up and maintain how long each zone needs to run in order to get 1" of water. This analysis test will also help fine tune the zones so that they are watering based on output rather than guessing how long each should run. Upon completing the catch can analysis test to find out how long to run each zone for 1" of water to be applied, we can take into consideration the grass type, soil type, and environmental exposure factors to further manipulate the output. For example if a zone needs to run for 30 minutes to put out 1" of water per cycle, and that zone is south facing, it may need to receive an extra 20-25% time to maintain equivalent moisture levels to another zone which is east facing and getting 1" per week. Although the test and irrigation factors may seem complex, once they are set up correctly along with controller systems they can save you on wasted water, disease problems, and your monthly water bills while giving you a better lawn to boot. A better lawn with less time and money inputs is an amazing combination.  If you liked my blog post, share it with a friend! For more information, questions or comments - sign up to share. About me Sean Welch is the owner/operator of SuperTurf LLC where he helps homeowners in the area improve the quality of their lawns and irrigation setups to achieve the success they desire. He was a formerly a golf course superintendent with a degree in Landscape and Turfgrass Management from Virginia Tech.

Chesterfield, VA. Have you noticed a light green weed outpacing the growth of your lawn 2-1, does it seem like just a couple days after mowing, it is back at full height and mocking you? If this is the case, you most likely have a weed called yellow nutsedge. Clearly defined by a triangular stem, nutsedge can be the bane of existence on lawns that are otherwise well maintained. Generally, nutsedge is found in sunny but wet areas including areas with poor drainage or where over watering practices are occurring. It is a perennial plant, so it will come back every year, and propagates through rhizomes, nutlets, and seeds. Objectively, the properties of the plant can make it hard to control, requiring a more consistent, steady effort than a blitz. Ensuring drainage in the areas that nutsedge grows is adequate, and setting irrigation controllers so that water is put down less frequently, will allow the soil in these areas to dry out and help reduce the outbreaks of nutsedge. With regards to reduction, suppression, and control, we look to a combination of efforts including preventing the nutsedge from going to seedhead. Just by keeping the plant from reaching seedhead alone, you are reducing the pressure that the weed is putting on the lawn. With the plant’s ability to propagate three different ways, I would recommend against pulling the weed and resort to some sort of chemical control. In a non-lawn area, with a non-selective herbicide such as Glyphosate (trade name Round Up), basic control can be achieved. In a lawn area, we must rely on 2-3 herbicide types in the same family which will help us work on not only the surface disruption that nutsedge causes, but also work on treating the nutlets and rhizomes that it uses to spread. Using chemicals in the sulfuron family at label rates will meet such a standard. Halosulfuron-methyl (trade name Sedgehammer) is a chemical treatment that treats both yellow and purple nutsedge, and is considered to be more gentle on turfgrass types in our area from fescues, bluegrasses, ryegrasses, bermuda grass and st. augustine at the proper rates. Sulfentrazone (trade name Dismiss NXT) with carfentrazone is a treatment for yellow nutsedge, as well as a few other broadleaf type weeds in grasses including tall and fine fescues, kentucky bluegrasses, ryegrasses, bermudagrasses, and others. If you are looking for a product made for warm season grasses only such as bermuda grass or zoysia, Sulfosulfuron (trade name Certainty) can be used. The earlier in the plant life cycle that treatment begins, the easier it is to control, the greater the size and maturity the difficulty increases significantly. Always make sure you are able to adhere to the safety protocols, rates and application methods for the safety of you, your lawn, and the environment. If you are not able to meet these standards, please refrain from making an application yourself and look to a licensed, insured professional with the proper equipment to make successful applications. If you liked my blog post, share it with a friend! For more information, questions or comments - sign up to share. About me  Sean Welch is the owner/operator of SuperTurf LLC where he helps homeowners in the area improve the quality of their lawns and irrigation setups to achieve the success they desire. He was a formerly a golf course superintendent with a degree in Landscape and Turfgrass Management from Virginia Tech.