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๐ฑ Elevate your garden game with natureโs most potent seaweed elixir!
Organic Sea-K is a premium, concentrated seaweed and kelp extract powder, delivering over 70 essential vitamins, minerals, and enzymes. Certified organic by OMRI and EU ECOCERT, it uses advanced low-temperature enzymatic extraction to maintain purity and bioactivity. With 18%+ soluble potassium and full water solubility, it supports robust plant growth, stress resistance, and vibrant yields across all growing media and systems.
| ASIN | B083LLVZQM |
| Best Sellers Rank | #63,148 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #1,522 in Garden Fertilizers |
| Brand | Greenleaf Nutrients |
| Brand Name | Greenleaf Nutrients |
| Coverage | Medium |
| Customer Reviews | 4.7 out of 5 stars 521 Reviews |
| Item Form | Powder |
| Item Weight | 1000 Grams |
| Manufacturer | Greenleaf Nutrients |
| Mixing Ratio | 1 gram per 2 gallons |
| Model Number | 7426911906942 |
| Number of Items | 1 |
| Part Number | Sea-K Kelp Extract 1kg |
| Specific Uses For Product | Garden cultivation and farming |
| Target Species | plants |
| Unit Count | 35.274 Ounce |
E**D
Great stuff.
Mixes well. Use it for young and old plants. It is doing the job plants are thriving, good color.
P**A
After One Year of Use -- Best Fertilizer I've ever used
Bought this in June 2025 as an avid orchid collector. They say it takes a bit to truly observe the long term effects of proper fertilizing in your orchid collection which has been true in my experience. All I can say is, this is absolutely a staple in my orchid growing routine now. I use half a teaspoon per gallon because regular and lower dosage is better for orchids IMO. Anyway, the blooms I've had since I began using this a little under a year ago have been some of the strongest in my collection. Orchids that struggled to bloom again are spiking etc. Highly recc.
D**R
Good kickstarter for rooting cacti
Worked great for getting my small tricho seedlings a boost. Using only have the dose this stuff can go along way.
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.
A**A
Huh?!!
I think this product musta came from a different county bc the writing & measurments on bag r NOT explanatory or easy to figure out how much to use. So I went on the light side of 1 top per gallon. My babies seem to like the stuff but I doubt i will buy again.
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 Iโve had in a long time and the colors are coming back on my silver dollar jades, and other succulents
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!
J**D
Get it now. No regrets.
One of the very few supplements I run in hydro. This stuff actually makes a difference.
T**G
Helps a lot
Great product acts like an innoculent to boost growth and supply organic matter to plants, boosts production,love it every gardeners helper
R**G
Excellent quality
Excellent quality
T**S
A Very Effective Biostimulant
I grow Atlantic Giant pumpkins competitively and had my most successful season last year by using this product extensively. I use it as both a foliar feed and as a root drench. I found it to be an effective biostimulant that made the plants greener and grow more vigorously. Additionally, the high percentage of potassium contributed to enhanced fruit growth. This product will be a staple of my gardening program going forward.
M**Y
I will buy again.
Hard to be objective here as I probably need to wait all season. What I will say is, my plants are thriving after several have been potted on. Wear a mask when using though, the powder is superfine and is a bit of an irritant if inhaled. Does NOT block my superfine can rose.
M**E
A little goes a long way
I've been adding it for the last 5 weeks on this new grow and I'm very impressed with the results so far. I use appropriately .5 to 1gram per 2 litres. The plant is in the veg state and is growing healthy, full canopy of green leaves, producing lots of bud locations. I would definitely recommend this product for the vegetation stage which will lead to lots of bud sites.
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