How Much Marijuana Can I Yield Per Plant? A Pound!

Marijuana A pound per plant

One of the most popular questions regarding marijuana is “How much marijuana can one plant produce?” or “How much will a 600 watt HPS yield?” There are no simple answers to this question as each situation depends on a number of variables.

Many people take up growing weed and they have a variety of reasons for doing so. In every case, you want to get the most out of your crop. Whether you’re growing for medical reasons or you just want to make a little money on the side, the overall yield is a top priority for all growers.

In this article I will discuss all everything there is to know about marijuana yields. Got questions or tips? Place them in the comments below this article.

Don’t want to read? Watch the video!

Maximum yield per plant indoors

Lights are of the utmost importance when you’re growing indoors. Experienced growers can produce about a gram of marijuana per watt of light (1 gram = 0,035 oz). So, a 400-watt HPS grow light can potentially translate to 400 grams or 14 oz of dried, usable cannabis.

HPS grow light

600watt HPS grow light with reflector

Likewise, a grow room with 1200 watts of light can yield 1.2 kilograms or 42 oz of cannabis. Having the right equipment, adequate nutrient solutions, beneficial air quality, and other valuable factors is important for producing the highest yields possible. Making sure the plants have space to grow is also key.

Tip: make sure to download my free Grow Bible and learn how to maximize your yield

Average expected yield per plant indoor from soil

If you are using soil to grow indoors, you can expect somewhat less of a yield than if you’d grown hydroponically. This is because hydro growers can fully control the amount of nutrients their plants receive.

Check out these pics below. You can see that hydro plants grow faster than soil plants
Pictures powered by:Bergmanslab.com

Although soil growing can potentially lower your yield, it also is easier to grow. This is because it not only creates a buffer for error but it also holds nutrients within the soil. When growing in soil, there is room to make mistakes with pH and TDS and pay for it in yield. In terms of numbers, expect a maximum of 1 gram per watt. That means a 600watt lamp can produce 600 grams of marijuana or 21 ounces.

Average expected yield per plant indoor from hydro

Growing hydroponically yields up to 20% more, as long as you do not make any mistakes. With hydro growing, there is no room for errors. You must be very careful about the TDS and pH levels because the roots are directly in water (and not soil) and incorrect levels can immediately effect the plants.

Check out these pics below. You can see that hydro roots grow faster than soil roots
Pictures powered by:Bergmanslab.com

There are rarely small mistakes while growing hydroponically. Even the most minor error can ruin your yield. However, those who do it correctly will be rewarded. You can expect up to 1.2 gram per watt, which means a 600watt HPS lamp can give you 720 grams of marijuana or over 25 ounces.

Cannabis plant yield calculator

A simple way to calculate your yield is by using a cannabis plant yield calculator. Yield O Rama has an excellent one that lets you select the type of light you’re using, the light intensity (lumen), your level of growing experience and your growing medium.

Marijuana yield calculator

Results from input cannabis plant yield calculator. Try the calculator yourself at this link

When using the yield calculator, keep in mind that an HPS grow light produces around 150 lumens per watt. For the exact amount of lumen that your bulb produces, check with the manufacturer.

The calculator has a few limitations- you cannot adjust it for the strain, and it’s only for indoor grows, but it is still quite handy. Check out the cannabis yield calculator here.

Marijuana yields in imperial measurements

  • An average of around 1.5 to 2.0 oz  (3.5 oz for advanced growers) with 200-watt CFL lamps in a grow cabinet that measures 3.5 x 1.5 x 6.5 ft.
  • An average of around 3.0 to 5.0 oz  (9.0 oz for advanced growers) with a 250-watt HPS lamp in a grow cabinet that measures 3.5 x 1.5 x 6.5 ft.
  • An average of around 4.5 to 9.0 oz (14 oz for advanced growers) with a 400-watt HPS lamp in a grow room that measures 3.5 x 3.5 x 7 ft.
  • An average of around 5.0 to 10 oz (21 for advanced growers) with a 600-watt HPS lamp in a grow room that measures 4 x 4 x 8 ft.
  • An average of around 9.0 to 18 oz (36 for advanced growers) with a 1000-watt HPS lamp in a grow room that measures 5 x 5 x 8 ft.

hps lamps distance yield

Different HPS lamps with distance for best yield

 

Marijuana yields in metric measurements

  • An average of around 40 to 60 grams  (100 for advanced growers) with 200-watt CFL lamps in a grow cabinet that measures 1 x 0.5 x 2 m
  • An average of around 80 to 150 grams (250 for advanced growers) with a 250-watt HPS lamp in a grow cabinet that measures 1 x 0.5 x 2 m
  • An average of around 100 to 250 grams (400 for advanced growers) with a 400-watt HPS lamp in a grow room that measures 1 x 1 x 2.5 m,
  • An average of around 150 to 300 grams (600 for advanced growers) with a 600-watt HPS lamp in a grow room that measures 1.2 x 1.2 x 2.5 m.
  • An average of around 250 to 500 grams (1000 for advanced growers) with a 1000-watt HPS lamp in a grow room that measures 1.5 x 1.5 x 2.5 m.

Grow place with proper metric measurements

Grow room with 1 x 600 watt HPS and Adjust a Wing reflector

How much does one marijuana plant produce

Indoor growth doesn’t bring with it a lot of certainty in terms of yield per plant. If you have only four plants per lamp, then you’ll yield much more than you would with total of sixteen plants for every lamp.

Tip: make sure to download my free Grow Bible  for more information about setting up your grow room

You should consider these things prior to choosing how many plants you want to grow:

  • If you’ve only got 4 plants, your yield will be 25% less if one gets a disease or dies