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Making Effective Use of Seaweed Based Plant Food

Deep in the bed of virtually every ocean and sea, there lies a large plant-like organism that survives incredibly harsh conditions through the sheer power of its natural vitamins, nutrients and hormones. The turbulent waves and swarms of kelp eating animals mean that in order to survive, it has to propagate easier and grow much faster than your average plant. Hydroponics supply companies harness everything that makes kelp such a powerful, fast growing and disease resistant plant by distilling it into seaweed plant food. Seaweed plant food can make a fantastic addition to your overall nutrient and supplement strategy, especially if you are growing organically, but only if you know how to do it correctly. Here are the best ways you can ensure that you are getting the most out of your kelp based plant food.

Spray it On Your Leaves – Though most seaweed plant food is produced with the expectation that it will be used primarily in the root zone, it can also make for a fantastic fertilizer. This can be particularly helpful you if you want to protect your plant from disease. Kelp contains natural antibiotics that can help keep harmful bacteria at bay. In addition, foliar feeding can help give your plants an extra boost of vitamins and hormones that they might not be receiving through their roots.

Use Fulvic Acid – To create a root zone that is truly ideal for the vitality of your plant, you would do well to invest in a hydroponic product that contains fulvic acid. Just like the old saying goes “You can lead a horse to water, but you can’t make it drink,” you can bring nutrients to your roots, but that doesn’t guarantee that they will absorb them rapidly. To do that, you have to make sure to include fulvic acid. This product will convert the compounds in your root zone from something that may not be useful into nutrients that will help your plant grow to its potential.

Use Humic Acid – While it is certainly possible to get an added advantage out of just using fulvic acid, if you really want to experience the most benefit from your seaweed plant food, you should also include humic acid to your nutrient solution. They serve similar functions and are derived from the same source, but differ in the conditions that render them soluble. These two products work in unison to make sure that the nutrients that you provide your plant are actually usable by your plant.

Increase Nutrient Concentration – Don’t assume that the nutrient concentration that worked well before you begin using seaweed plant food will still work after you begin using kelp extract. By using seaweed fertilizer, fulvic acid and humic acid, you will be increasing nutrient uptake by an amazing degree. But this increased metabolism won’t help much if you don’t have the nutrients to help you. Experiment with increasing your nutrient concentrations slowly to see if your plants react favorably to the changes.


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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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