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Extended Control Weed Preventer 13.75-lbs. 2245-sq ft Pre-Emergent Herbicide

Preen Extended Control Weed Preventer 13.75-lbs. 2245-sq ft Pre-Emergent Herbicide

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Is this safe for established rose bushes? Is this safe for established (traditional, bearded) irises? I scanned the lengthy, small print on the pail, but did not see listings for either, on either a safe or unsafe list.


Thank you for your inquiry! Preen Extended Control can not be used with either of those due to the active ingredient Isoxaben. You can however use Preen Garden Weed Preventer with them. Thank you, Customer Service

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