SNS-209 ™ All Natural Systemic Pest Control - Safely & Easily Make Your Plants Resistant To Pests! SNS-209 All Natural Systemic Pest Control provides a barrier for plants to protect them against damaging insects. SNS-209 is made up of 100% pure botanical extracts that are highly water soluble. How it Works SNS-209's unique formula works by allowing the plant to uptake a small amount of rosemeric acid from the rosemary plant. When an insect sucks fluids out of the plant, it comes in contact with the rosemeric acid. This is not a taste they are accustomed to nor do they like. You will notice the insects staying away from this plant as they try to find another. Directions for Use: Add 2 mL per Liter of SNS-209 everytime you water or fertilize. May use in your reservoir in conjunction with nutrients. You can use it daily or every few days. It takes about 1-2 weeks to start working and will continue to work for up to 3 weeks. Once you notice it starting to work, discontinue use. Reapply every 14-28 days as needed. Over usage may cause leaf curling and it's a waste of product and money. Discontinue use two weeks prior to harvest and allow the rosemary to flush out of your plants naturally.