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Organic Nutrients and Fertilizers used in Hydroponics

When organic growers think of hydroponics, they mostly assume that organic principles and organic growing are totally incompatible. Really, nothing could be further from the truth. Just because you choose not to use soil, that doesn’t mean that you can’t grow vegetables and other plants using strictly organic materials. In fact, some hydroponic growers report that it is actually easier to grow organically in a hydroponics system than through other methods. Hydroponic growers even have several different kinds of organic nutrients and fertilizers available.

Bat Guano – But guano has long been a popular fertilizer because it is rich in organic nutrients. There are two primary kinds of bat guano: those that come from insect eating bats and those that come from fruit eating bats. The guano that comes from insect eating bats is usually very rich in nitrogen, which means it is a fantastic organic fertilizer for promoting plant growth. The kind that comes from fruit eating bats is usually much richer in phosphorus, which means that they are more beneficial for budding and flowering. In addition to the nutrients, bat guano also contains beneficial microbes that can help improve the health of your plants.

Seaweed or Kelp – the ingredients in liquefied seaweed have certain compounds which have been shown to stimulate growth. This completely natural organic nutrient can help stimulate chlorophyll production in hydroponically grown plants. It can also stimulate the beneficial bacteria in your reservoir, which can help protect your plants from harmful bacteria and increase nutrient uptake.

Fish Meal – Fish based fertilizers have a lot of proven benefits for hydroponically grown plants. In some larger hydroponics systems, some people even keep live fish right in their reservoir to use them as a natural fertilizer source. In addition to the organic nutrients that they provide, fish fertilizer can provide enzymes and essential oils that can protect and strengthen your plants. If you want to give your plants an extra boost, you can also use it as a foliar fertilizer, meaning that you can apply it directly to your plants’ leaves.

Earthworm Castings – In a traditional soil organic garden, gardeners often work to encourage earthworms to live and eat beneath the soil of their garden. This is because the excrement, or castings, or the earthworms creates a powerful fertilizer that provides plants with a lot of nutrients that they can use to create bigger yields. Hydroponics growers don’t use soil, but they can still take advantage of the many benefits of fertilizing with earthworm castings. Many hydroponics retailers sell liquefied earthworm castings that you place right into your reservoir.

While you many find that some products do contain just one kind of these organic nutrients, most contain a blend of them. These blends can very potent, as they give your plants several different kinds of organic nutrients that can help them grow significantly. Some are even specially formulated to improve a specific aspect of your plant’s development, such as those that can improve the size of your buds or your yield.


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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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