Search  for anything...

Amazon.com

  • Based on 0 reviews
Condition: New
Checking for product changes

Buy Now, Pay Later


As low as $8 / mo
  • – 4-month term
  • – No impact on credit
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout. Payment plans are offered through our trusted finance partners Klarna, PayTomorrow, Affirm, Afterpay, Apple Pay, and PayPal. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Free shipping on this product

This item is eligible for return within 30 days of receipt

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.


Availability: In Stock.
Fulfilled by Amazon

Arrives Friday, Nov 29
Order within 26 minutes
Available payment plans shown during checkout

Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Friday, Nov 29

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • Quality and Care
I buy NPK not only for the quality of their products, but also for their philosophy of freely sharing information. They've got a TON of videos on YouTube with detailed and concise information on their products, and on how to use them. (Thanks, Harley!)
Reviewed in the United States on May 13, 2020 by Pete

  • Works great
My lady slipper orchids suddenly grew new leaves. Orchids more alive.
Reviewed in the United States on September 24, 2018 by Bradley Cooper

  • Great product!
This kelp is super strong and dissolves quickly in water which were two of the things I was looking for. It will last you a long time and the quality is top notch! Your garden will thank you!
Reviewed in the United States on July 21, 2017 by omino

  • Help beginners
Frist time to use in a grow I like it
Reviewed in the United States on October 15, 2019 by Steve

  • Needs better packaging.
The airtight lock on the packaging doesn't work after a couple of times opening and closing.
Reviewed in the United States on February 7, 2022 by shalva djaparidze

  • Good Stuff!
My Tomato seedlings, shot up and look very healthy.
Reviewed in the United States on March 19, 2018 by mikey

  • Great product for a great price
Kelp is the fastest growing plant on each the hormones in this product make your plants grow unbelievably fast
Reviewed in the United States on February 12, 2020 by Joseph

  • Good stuff
Good plant food. I like that it comes in a resealable pouch. Kelp makes my plants happy.
Reviewed in the United States on April 17, 2020 by E. Ko

Can't find a product?

Find it on Amazon first, then paste the link below.