Root and Stump Killer

Potassium Nitrate

Seed Barn

99.8% Pure Potassium Nitrate Powder (Saltpeter)

Potassium nitrate is used in a variation of ways, but mostly seen in fertilizers and the removal of tree stumps. Produces wonderful nourishments for plants and promotes healthy and efficient plant growth as well. Providing nutrients is a vital part of the metabolic process in the plant's cell that acts as a water management source for the plant, ensuring a healthy style of living.

Characteristic Ratings

  • Colorless and Odorless
  • Water-soluble and chloride free
  • Protect chloride sensitive crops (strawberries, lettuce, beans, etc.)
  • Produce Fertilizer Blends
  • Greenhouse Grade

Customer Reviews

Thank you for submitting your review

Based on 40 reviews Average Rating 4.85 stars out of 5
Filter 35 Reviews with 5 star rating
Filter 4 Reviews with 4 star rating
Filter 1 Review with 3 star rating
Filter 0 Review with 2 star rating
Filter 0 Review with 1 star rating
  • E
    Erik Hunter E. H. Erik H.

    Fast Shipping on KNO3

    One of the few suppliers for Potassium Nitrate in bulk. Fast Shipping!

  • N
    Nanette Stewart N. S. Nanette S.

    Wonderful service

    Came before it was supposed to!

  • j
    john jergenson J. J. john j.

    Checking In On 1 x Potassium Nitrate. Please share your feedback.

    Meets all expectations

  • R
    Robert May R. M. Robert M.

    Potassium Nitrate

    Very good price. Great company to buy from. As for the potassium nitrate it looks clean and pure. I use it in my compost and to speed the decay of stumps so I can only assume it will work as good as any.

  • P
    Phillip Lund P. L. Phillip L.

    Better than expected

    VERY clean! Nearly pure from what I can tell. Love that it's in a fine powder form as opposed to pellets. Meters perfectly in my applicator without binding or sticking. Will DEFINATELY be ordering again when needed!

  • M
    Mark Frey M. F. Mark F.


    Easy transaction and fast delivery

  • C
    Curtis Renz C. R. Curtis R.

    Potassium nitrate

    My potassium nitric came in a timely manner and it was exactly what you guys had described. All in all, I was really pleased with the my purchase. I would be inclined to buy from seed world again.

  • B
    Beth Powers B. P. Beth P.

    Potassium Nitrate

    It was very easy and reasonable to purchase the Potassium Nitrate which I use for seed soaking, foliar sprays, and more to encourage fruit production and flowering and germination

  • R
    Randy Myers R. M. Randy M.

    Just what I needed!

    Great product and at great price. I did math and they’re the cheapest. Also surprised to get my shipment several days early. Thanks, I will be ordering from Seed World again.

  • G
    Gregory Sikora G. S. Gregory S.

    potassium nitrate

    Loved the product, but shipping was slow. It took almost 2 weeks to arrive.

  • S
    Scott Shepherd S. S. Scott S.

    Product seems fine, not used yet.

    Product seems fine, four stars due to packaging failure, fortunately double wrapped as clear inner wrap failed in shipping. Good idea to carefully open opaque outer wrap and make sure product is contained.

  • p
    patrick ream P. R. patrick r.

    good service

    Fast and what I wanted

  • R
    Richard E Moutray R. E. M. Richard E. M.

    Stump killing time

    It was twice what I needed but cheaper that way, and I'm sure I can find some use for it. Maybe flowers? If you pay $14 per 2lb at home depot killing a dozen stumps is really going to add up fast. There are other companies with 50lb cheaper but add in $100+ for S&H then seedword is the best price with low shipping costs and I'm 3 states over. Hopefully I don't need to ever buy more, but if I do I'll get it from seedworld.

  • D
    Davis Negrete D. N. Davis N.

    Probably fine

    When the order arrived, the plastic bag had a small hole in it so there was some spillage/loose granules that had come out in transport and I had to put it in a new container. But overall it wasn't a huge deal. As long as my plants like it, I'll be satisfied.

  • T
    Timothy Sawyer T. S. Timothy S.

    Great product....bad packaging

    I have bought this several times....however this time...they just dumped the powder into a USPS bag which leaked out the ingredients into the shipping box.............don't do this again Seed World....not good.

Ask your Question about this product

Category: Potassium Nitrate

Type: Chemicals

Brand: Seed Barn

Related Items