How to Calculate the Maximum Number of Cannabis Plants in a Greenhouse

When designing a cannabis cultivation setup in a greenhouse, one of the key considerations is determining the maximum number of plants that can be accommodated. This involves understanding the space requirements per plant, the layout of the greenhouse, and the accessibility needed for maintenance and harvesting. In this post, we’ll walk through the geometric and mathematical calculations to determine the maximum number of cannabis plants in a 1000 m² greenhouse, assuming each plant occupies a 400 mm x 400 mm space and is arranged on tables with rows of 2 plants, space 1 m between tables and there is a corridor of 3 m at the the top. The greenhouse is 20 m wide and 50 m long.

Key Assumptions

1. Plant Footprint: Each cannabis plant occupies a space of 400 mm x 400 mm (0.4 m x 0.4 m).
2. Greenhouse Dimensions: The greenhouse is 20 m wide and 50 m long, with a 3-meter corridor reducing the growing length to 47 m.
3. Layout: Plants are arranged in rows of 2 plants on fixed tables, with 1-meter spacing between rows for access.
4. Access Space: No additional aisle is needed since the 1-meter spacing between rows provides access.

Step 1: Calculate the Space Occupied by One Row of 2 Plants

Each row consists of 2 plants side by side:

                           Width of row=2×0.4 m=0.8 m

The spacing between rows is 1 m. Therefore, the total space occupied by one row and the spacing to the next row is:

                          Space per row=Width of row+Spacing=0.8 m+1 m=1.8 m

Step 2: Determine the Number of Rows That Fit in the Greenhouse

The greenhouse is 20 meters wide. To determine how many rows can fit side by side, divide the width of the greenhouse by the space required per row:

                          Number of rows=Width of greenhouse  /    Space per row= 20 m  /  1.8 m≈ 11.11

Since we can’t have a fraction of a row, we round down to 11 rows.

Step 3: Calculate the Number of Plants per Row

Each row contains 2 plants. The number of plants per row depends on the length of the greenhouse (47 m).

Number of plants per row:

Number of plants per row=2×  Length of greenhouse /    Spacing per plant    =    2×47 m     /    0.4 m =  2×117.5=  235 

Rounding down, each row can accommodate 235 plants.

Step 4: Calculate the Total Number of Plants in the Greenhouse

Total plants=Number of rows  ×   Plants per row   =  11×235   =   2585 plants

Final Answer

With a 3-meter-wide corridor running along the 20-meter width of the greenhouse and fixed tables with 1-meter spacing between rows of 2 plants, the maximum number of cannabis plants that can be grown in a 20 m x 47 m growing area, considering each plant occupies 400 mm x 400 mm, is approximately 2,585 plants.

Optimization Notes

1. Spacing Between Rows: The 1-meter spacing between rows is necessary for access and maintenance but reduces the total number of plants compared to layouts with shared aisles.
2. Corridor Placement: Placing the corridor along the width (20 m) instead of the length (50 m) minimizes the reduction in growing space.
3. Buffer Space: Always leave some buffer space for equipment, ventilation, and operational flexibility.
4. Alternative Layouts: If the spacing between rows can be reduced (e.g., to 0.8 m), more rows can fit, increasing the total number of plants.

Author:  MANOSTAXX team

The text above is owned by the site above referred.

Here is only a small part of the article, for more please follow the link

Also see:

www.manostaxx.com