COVID-19 Notice: Shipping times may vary.  Learn More


Your Cart is Empty

Grow Supply Shop Staff

by Grow Supply Shop Staff March 11, 2020 1 min read

Here’s the quick and dirty guide to the difference:

Cannabis needs three main chemical elements to survive, in addition to water, carbon and oxygen. They are Nitrogen (N), Phosphorus (P) and Potassium (K), commonly referred to in horticulture and cultivation as NPK. For all of you that fell asleep in high school chemistry the symbol for Potassium on the Periodic Table of Elements is K. That’s where K comes from. Don’t worry, nobody is going to ask you how many electrons Potassium has. Moving along now … 

N – Nitrogen – this is important for growth and how plants create energy. This occurs in what’s known as the vegetative state.

P – Phosphorus – helps plants take in minerals and nutrients. This contributes to big healthy blooms and flowers.

K – Potassium – helps plants regulate all of the systems and transactions that occur within the plant cell structures.

With that now understood, Grow, or Veg, nutrients are higher in Nitrogen.

Bloom nutrients are higher in Phosphorus.

The three digit ratio on the package of any nutrients will let you know the breakdown of NPK. For example, a Grow package reading “7-4-5” will contain 7% of available Nitrogen, 4% of available Phosphorus and 5% of available Potassium. You would use this mix in the earlier stages of your plant’s lifecycle.

Hope this helps.

If you have any questions, comments or concerns, please leave us a comment below or shoot us an email at

Grow Supply Shop Staff
Grow Supply Shop Staff

Leave a comment

Comments will be approved before showing up.

Also in Cultivation Chronicles

The Different Types of Grow Lights for Indoor Plants Blog at Grow Supply Shop
The Different Types of Grow Lights for Indoor Plants

by Grow Supply Shop Staff April 30, 2021 7 min read

We just took the confusion out of learning about the different types of grow lights for indoor plants by putting all the pros and cons of each in one place. 

GSS used to have mainly LED grow lights. Now there are all kinds to choose from. Learn what each light is, what it does, and how it can help your indoor grow set up.

How to prevent and remove powdery mildew that kills indoor plants blog
How to Prevent and Remove Powdery Mildew that Kills Indoor Plants

by Grow Supply Shop Staff April 16, 2021 8 min read

Powdery mildew is one of the top destroyers of grows. Humid environments are most vulnerable, but this menace invades indoor and outdoor plants in deserts, too. Stick around, and we’ll teach you how to prevent and remove powdery mildew infections so you won’t have to worry about your indoor plants getting ruined.
Guide How to Increase Trichome Production: 4 Easy Methods
How to Increase Trichome Production: 4 Easy Methods

by Grow Supply Shop Staff April 02, 2021 4 min read

Are you wanting to take your grow to the next level? Learn how you can increase the trichome production in your indoor grow room. 

Sign up for our Newsletter