

🌱 Elevate your garden game with nature’s most powerful seaweed elixir!
Organic Sea-K is a concentrated, 100% water-soluble kelp and seaweed extract powder, packed with over 70 essential vitamins, minerals, and enzymes. Certified organic by OMRI and EU ECOCERT, it uses advanced low-temperature enzymatic hydrolysis to preserve purity and bioactivity. With over 18% soluble potassium and rich in natural growth hormones, it supports robust plant growth, stress resistance, and enhanced yields across all growing media including hydroponics and soil.
| ASIN | B096L9TP26 |
| Best Sellers Rank | #61,005 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #1,603 in Garden Fertilizers |
| Brand | Greenleaf Nutrients |
| Date First Available | August 12, 2022 |
| Item Form | Powder |
| Item Weight | 7.1 ounces |
| Item model number | 742776993208 |
| Manufacturer | Greenleaf Nutrients |
| Number of Items | 1 |
| Product Dimensions | 9 x 6 x 0.5 inches |
| Specific Uses For Product | Hydroponics, Soil, Plant Growth, Root Feeding and Foliar |
| UPC | 742776993208 |
| Unit Count | 7.0548 Ounce |
M**Z
Worm Castings tell me it WORKS!
I have never seen worm castings in my soil. Been using this every 3 weeks, for 3 about three months and I am seeing worm castings. Alot of people don't like worm castings because they are not pretty, but I love them because it tells me my soil is rich with microbes and worms naturally aerate the soil. This product works very well, super highly concentrated that goes a long way!
P**.
Clean,pure,high quality
Green leaf nutes produces high quality products for gardening and cannabis cultivation. Iv used kelp extract in both compost teas and foliar feedings for over 15yrs. This product is the most affordable on the market and is highly concentrated. A little goes a long way. If you value strong, healthy, vigorous plants. Buy this product!!
S**J
Fantastic
For whatever reason this prime order was sent out through the post office and they lost it. Amazon immediately refunded the money then I found the product locally in a garden center. It works absolutely fantastic. I grow indoor mini tomatoes and mini sweet peppers over the winter plus a multitude of various house plants the seedlings are some of the strongest I’ve had in a long time and the colors are coming back on my silver dollar jades, and other succulents
J**D
Get it now. No regrets.
One of the very few supplements I run in hydro. This stuff actually makes a difference.
J**K
Good potassium source not quite a growth stimulant
overall very good but its not quite as good of a growth stimulant as other kelp feeds. I would honestly just use this if youre looking to add potassium to your soil i dont believe the hormones in this brands kelp are still effective once you get it.
R**L
Plants really grow well with this fertilizer.
Plants love this stuff.
K**E
Need small amount only and quickly dissolved
Planted a chaos garden on the side of my house and i set up a solar watering system and dropped the pump into this 5 gallon container . I decide to add the kelp to my rain catcher can so it will be distributed directly to the roots . Im really excited to see how well this works . I added 1/2 tsp (2x1/4 tsp) to the 5 gallon can . Easy to use/measure and dissolved instantly which will be easy on the solar pump.
J**S
Great kelp extract
Very effective with visibly clear results in 1-2 weeks after use. Super for bottom watering and root hydrotherapy. My oldest and most ailing succulents are completely revitalized. Leaves are full again, vibrant colors have returned. Baby plants are loving the extract too.
T**G
Great product acts like an innoculent to boost growth and supply organic matter to plants, boosts production,love it every gardeners helper
J**E
This plant food is very effective. Its also great value for money as its in powdered form, so your not paying for a diluted product. It comes in a small packet and looks quite funky with that artwork. It has a definite smell which some people may not like, but I think all kelp products share this trait.
A**I
Generally I like most kelp products. But compare to the price this one was really nice. The solubility is good. I just sprayed one time 1gr/L on my plants and I can say it works as expected. Yea. Good product.
B**S
Used this for some of my plant pots impressed at how well they have grown
S**M
Great for succulents, lithops and cactus. Goes a long way. Value for money
Trustpilot
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