Whether or not you applied a crabgrass pre-emergent or perhaps a straight fertilizer in April, early to mid-May is usually the time for an application of either a fertilizer or a “weed and feed” (a “weed and feed” refers to a fertilizer that also has a herbicide in it).
* * * A word of warning when applying a “weed and feed” to newly seeded grass OR to an area you are planning to seed… Herbicides typically inhibit the germination of grass seed, so you should always read the label of the product to find out the recommended waiting period between applying the herbicide and planting grass seed. Typically, you will need to choose one or the other – seed in the spring or apply a product with a herbicide in it. * * *First, we always recommend Soil Testing, and then working with us to develop your fertilizer program with your soil analysis and your goals in mind. When you don’t have a soil test or a custom fertilizer program in place, for a May application, consider these 3 options…
OPTION 1 …
NO NEED TO TREAT WEEDS?
A product without any type of added herbicide, like our 25-0-10 fertilizer, would be appropriate. Our 25-0-10 gives you a boost of Nitrogen to green up your lawn and make it more lush, and a higher level of Potassium than most of the products you can buy at the local garden centers, which helps promote root growth, heat and drought hardiness, wear tolerance, and disease tolerance. Wait 6-8 weeks from the time of your last application, or if this is your first application of the year, you can make your first application now.
OPTION 2 …
NEED A SECOND (or first?) APPLICATION OF CRABGRASS PRE-EMERGENT?
Frankly, the window of time to get the most bang for your buck with a crabgrass pre-emergent has passed so we don’t usually recommend treating for Crabgrass at this time of the year, but we realize some people may want to give it another shot.
A very small percentage of crabgrass seeds MAY still be lurking. If you did an application of crabgrass “weed and feed” 6-8 weeks ago (like the 15-0-3 Crabgrass pre-emergent PLUS fertilizer
that we carry), you might be considering a 2nd application. If you choose to do this,
you’d want to get the crabgrass pre-emergent applied by May 11th for this product to be as effective as possible (in other words, BEFORE those few remaining crabgrass seeds have reached the germination stage).
OPTION 3 …
WANT TO BATTLE THOSE PESKY BROADLEAF WEEDS?
Dandelions and other broadleaf weeds are among the most troublesome turf pest problems in lawns, and it looks like this spring will be an especially bad year for them. Wait 6-8 weeks from the time of your last fertilizer or weed-and-feed application, or if this is your first application of the year, now would be a good time to get something down. That said, we offer several ways to effectively control broadleaf weeds.
One method is by applying Trimec 22-0-5 + Iron, which is a post-emergent broadleaf “weed and feed” with added Iron to give your grass a richer, deeper color. The active ingredient, Trimec, needs to be absorbed by susceptible plants in order to be effective, so for best results, mow one to two days before application and then water lightly or apply in the morning for proper adhesion to plants.
Another very effective product that Red Hen Turf Farm carries is a newish selective herbicide called Tenacity. Tenacity does NOT contain any fertilizer, so if this is the herbicide you choose, you’ll likely want to also do a fertilizer application in May (refer to Option 1 above). When properly applied, Tenacity will destroy the weed but not harm your grass. Tenacity can be used both as a pre-emergent and post-emergent to selectively control 46 weeds and grass species, including dandelions, clover, creeping bentgrass, perennial ryegrass, or fine and tall fescue. And it’s safe to use on established or newly seeded turf. Tenacity works by inhibiting photosynthesis, so it does turn the targeted weeds white, and it may also cause temporary whitening of your turfgrass (for a few weeks anyhow).
One more product we carry for battling broadleaf weeds is a spot-spray called Triamine. Triamine does NOT contain any fertilizer, so consider a fertilizer application in May as discussed in Option 1 above. Triamine is a liquid three-way amine formulation that controls a wide range of broadleaf weeds, including dandelions, chickweeds, plantains, oxalis and spurge.
CLICK on this Screenshot to READ Purdue Extension’s FREE PUBLICATION, “Control of Broadleaf Weeds in Home Lawns”
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Please call Red Hen Turf Farm, or come in to get advice on which is best for your situation… 574-232-6811 is the number.