Knowledgebase

Potassium Carrier in Crabgrass Preventers #862429

Asked March 25, 2024, 9:55 AM EDT

I fertilize my lawn in the fall, so in the spring, I use crabgrass preventers without fertilizer. I have historically used 0-0-7 products, which I have learned the potassium is a "carrier". I am thinking about using the Scotts Halts Crabgrass & Grassy Weed Preventer, which I confirmed with Scotts is 0-0-0. Is there any advantage of a 0-0-7 product over a 0-0-0 product? Does the carrier provide a benefit? Thank you.

Baltimore County Maryland

Expert Response

We have not encountered any scientific documentation as to why potassium would act like a "carrier" in this situation. It might be included in the formulation to boost turfgrass growth in conjunction with treating the weeds, but that shouldn't be necessary, and using a zero N-P-K formulation would be ideal instead.

Miri
Answered by the Home and Garden Information Center (HGIC), University of Maryland Extension. For timely gardening information and tips, subscribe to our Maryland Grows blog and quarterly newsletter. Follow us on Facebook, Instagram, and YouTube. Replied March 25, 2024, 5:17 PM EDT

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