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Nancy from Henderson, Co writes

How often should I apply Fertilome Tree and Shrub Systemic Insect Drench?

I have 2 purple robe locusts. Nursery told me to apply drench in spring AND fall. Directions say 1x per yr?

Answer:

Fertilome Tree and Shrub Systemic Insect Drench is meant to be applied once a year. This product has enough of the active ingredient to last over the year to continue killing insects. 

Answer last updated on: 08/25/2017

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