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What Can You include in a Foliar Spray for a Hydroponic System?

If you want to try an easy and simple way to get the most from your plants, you really can’t go wrong with a good foliar spray. But what exactly goes into a foliar spray? Typically it is the same kind of essential nutrients that you would find in a reservoir. But if you want to get the full benefits, you should also consider what kind of supplements you want to add to your foliar spray. Balancing the right kind of nutrients and organic material ensures that you are getting the absolute best benefits from your nutrient solution. Here are few things people typically put their foliar spray to get the best results from this advanced feeding technique:

Beneficial Bacteria – If your plants are growing too sterile for their own good, you should probably invest in a hydroponic product that contains beneficial bacteria. These kinds of bacteria can “fix” atmospheric nitrogen so that it can be absorbed more easily for your plant, increase overall nutrient uptake, and ward off any harmful bacteria. Most people only use it in their primary nutrient solution, but it works well when added to a foliar spray as well. It will enhance the nutrient solution by making them more easily absorbed by the leaves.
It can also make the foliar feeding process much safer. By introducing all that extra moisture to your plants, you may risk encouraging the formation of harmful fungi. The presence of symbiotic bacteria can head this off by making conditions for these fungi less favorable.

Plant Boosters – Plant boosters aren’t just useful for your reservoir; they can also be extremely beneficial for use in your foliar spray. Most plant boosters contain one more or more B vitamins that can help encourage vigorous growth all the way to harvest. Unfortunately, if your plants are only receiving these vitamins through their root zone, they may not be absorbing these helpful supplements to their full potential. Adding them to your foliar spray helps optimize uptake, and bigger yields once it comes time to harvest.

Fish and Kelp – If you are looking for a more organic foliar spray, you can’t go wrong with either a fish or a kelp based fertilizer. Many organic hydroponic products offer a combination of these two fertilizers in single product.

Humic Acid – Humic acid is often added to foliar sprays to increase uptake. It is able to turn nutrients that otherwise cannot be absorbed the plant into forms that are more bio-available. It can even improve vitamin uptake, which makes it ideally suited for use with a B vitamin plant booster.

To get the most benefit from your foliar spray, you need to use it when the stomata, or pores on your leaves, are open. They are usually more open when the temperatures are a bit cooler in your grow room. You should also try alternating different foliar sprays on different days, so your plants can enjoy the benefits that come with each type.





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Since 1999, Advanced Nutrients has been committed to educating the community and bringing the most up-to-date knowledge to the forefront of grows across the globe. Every article you read here has been curated by Advanced Nutrients’ industry experts, so you can continue raising your bud weight… and your reputation.

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Over time, components within the nutrients settle on the bottom of the bottle. When you pour a bottle without shaking it, you can potentially be pouring out an unbalanced solution. Shaking up the nutrient bottle ensures you are pouring the right blend into your reservoir, giving your crops the nutrition they need.

Usually, it’s not a problem. But some products are incompatible with each other and can damage your plants when they’re used together. For example, bloom boosters with high PK numbers or low-grade silica products can destabilize your nutrient mix and cause nutrient lockout.

Nutrient manufacturers design their products to be used with each other. In doing so, they include specific portions of each nutrient in each product, so crops receive the right nutrition through each stage of the grow cycle. When you stick with one manufacturer, you don’t have to worry about inadvertently destabilizing your nutrient mixture. One example of why you need to stick with only one manufacturer’s products is Advanced Nutrients’ pH Perfect line. These products are designed to keep your crops’ root zone within a specific pH range. When you use them alongside products from another manufacturer, we can’t guarantee your root zone will maintain its optimal pH level.

Yes! If you’re growing with Advanced Nutrients products, you can use our easy nutrient calculator to generate the correct nutrient chart for your crops in seconds. Check out Advanced Nutrients’ nutrient calculator here. Another great resource is our library of free custom-growing recipes. Try our expert grower-tested nutrient schedules here.

You can also download our official BudLabs app to generate nutrient schedules and receive real-time notifications for specific tasks, including feeding your crops. Upgrade to BudLabs Pro to maintain profiles on an unlimited number of crops.

If you are a grower, visit this link to find the closest Advanced Nutrients Authorized Retailer. If you are a retailer, visit this link to identify our official distributors.

Our greatest passion is growing great cannabis—and helping other growers do the same. That’s why we offer complimentary cultivation support 24/7 from Monday to Friday and from 9 AM until 7 PM PST on Saturday… With the same level of advice licensed producers would pay consultants tens of thousands of dollars to unlock.
Just call 1-800-640-9605 or email support@advancednutrients.com. For Spanish-speaking growers, email spanishsupport@advancednutrients.com.

Yes! If for any reason you are not absolutely thrilled with the results you achieve when you use our products, just bring the unused portion, along with your original sales receipt, back to the place of purchase within six months, and ask for your money back. Find out more about our Grower Guarantee here.

Advanced Nutrients has spent many thousands of man-hours developing a technology that automatically balances your pH for you — putting it in the “sweet spot” and holding it there for one week.

And the technology is so “smart” that it can account for many of the aforementioned variables in your grow room. Our proprietary pH buffering agents and stabilizing mechanisms became the foundation of a new system aptly called pH Perfect® Technology. Learn all about it here.

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