all kinds of weeds - Knowledgebase Question

sewell, Ne
Avatar for johnkook
Question by johnkook
April 11, 2010
march 20, i over seeded and fert. new grass starting about 2inces tall when should i start with scotts steps fert. crab grass dandelions clover afew other weeds dont know what they are. need help what should be next step and when? thank u

Answer from NGA
April 11, 2010
A pre emergent should be applied before the crabgrass begins to sprout. Crabgrass starts germinating when soil temperatures are 50 to 55 degrees F for ten or more days and germination can take place over a 6 week period. Pre-emergence herbicides provide excellent weed control for crabgrass. The compound prevents the weed seed from germinating, but it will not kill the newly sprouted seedlings. Watch the weather - mid April to early May is usually a good time to apply pre-emergence control. Now that your new grass is a few inches tall, the roots should be established well enough to tolerate the pre emergent.

You can use a combination product that contains a pre emergent and a fertilizer such as Scotts Turf Builder with Halts Crabgrass Preventer in now. You'll need to wait at least 30 days after application before using a spot treatment weed killer (you don't want to overwhelm your lawn!) Ortho? Weed B Gon MAX? Weed Killer For Lawns Ready-Spray? will take care of dandelions, clover and other broadleaf weeds.

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