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Blue planet liquid seaweed review8/8/2023 ![]() ![]() The application rate is much lower than kelp meal because we’re not using this to enrich the soil, but rather to feed the plants directly. It’s then powdered so you can mix it with water and spray it on your plants and soil. This is kelp meal that undergoes further processing in order to get more nutrients out of the kelp. I tend to gravitate to the efficiency of liquid fertilizers, especially when it comes to supplying trace elements, and among dry fertilizers, kelp meal is particularly expensive, but if I ever found some on sale, I’d certainly consider it. This is simply kelp that is dried and processed into a meal (not as fine as a powder – it’s closer to rolled oats) and applied to the soil. There are 3 main formulations of kelp as a fertilizer: Some seaweeds can grow over 2 feet per day. It’s not nearly as concentrated as an extract or a commercially-processed liquid kelp fertiliser, but that’s okay – it still brings benefits. When you’re ready, mix it with 10 parts water and spray it directly onto your plants. If you let it sit long enough, most of the seaweed may decompose and dissolve, but if there’s any left, you can still throw it onto your garden as a mulch. Adding a bit of Effective Microorganisms into the water can cut down on the smell. It smells fairly bad because it’s an anaerobic fermentation, but that’s okay. Let it sit for at least a couple of weeks (or more like a couple of months in cold weather). You don’t have to rinse off the salt first, although if you happen to know you already have an excess of salt, you certainly can. If you want to make a basic liquid seaweed fertilizer, pack the seaweed into an airtight container and fill it with water. If you live near a beach with some seaweed on it, you can just take that and use it directly as a seaweed garden mulch, provided it’s legal in your area to remove it.īe sure to leave most of it for the beach, though, as it has a big role to play there as food and habitat for many different species. Organic farming consultants often recommend it be included in any spray application regardless of what else is being used. In addition to the nutrients it contains, many of the benefits are attributed to the “plant growth regulators” in seaweed. He published many papers and eventually wrote a great little book called ‘Seaweed and Plant Growth.’Īnd since then, there has been a ton of research. Senn did a lot of research on using seaweed as a fertilizer back in the 60s and 70s. Seaweed feed has been well studied and has become a mainstay of organic farming and gardening.
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