Jack's Nutrients 15-0-0 Part B Calcium Nitrate, 25lb

I use this in my hydroponic gardens. I’ve tried other brands but honestly this is the only one I will use. It produces some amazing quality veggies and fruit.

For the money you get a good supply of fertilizer that is easy to mix and is the best I have found. If you want healthy plants you will be more then happy using this.

Hands down the best hydroponic fertilizer I have ever used!!!! This is like giving steroids to your pl!!! This will make them grow so quickly and produce more so long as you follow specific instructions! Very easy to use as long as you know how to measure!!! I’m a lifelong customer of this product!!!!

I've used this for years and its never disappointed.

been using jacks nutrients for years and they have always produced quality flowers and veg. Much cheaper to by the big bag than the 2.2 lb bag. Actually saved over 200 dollars if you do the math. Definitely the way to go

Can’t go wrong with Jack’s 321 line of products as long as it’s mixed properly. Always thumbs up!

great product one of the best nutrients out therr

I started using the Jacks 321 formula in hydro and now use it in all my grows.