Once you have made your growing place air and light-tight, you have to think about the temperature of the room. If you create the ideal climate for the plants, they will grow well and produce a maximum yield. For optimal air circulation, you need one (or more) fan(s). By constantly circulating the air, the fan ensures an even distribution of temperature, humidity, and C02 (carbon dioxide). With a dimmer, you can set the speed of the van. If your budget allows for it, you might want to invest in a thermostat, a humidistat or a thermo-humidistat. You can use it to set the desired maximum temperature (around 28 °C).
Start with the cheapest and simplest set up Air or water cooled variants can always be purchased later. First try if the basic equipment is sufficient.
You also need an extraction system with an activated carbon filter. Cannabis plants need carbon dioxide (CO2) to grow. They get this CO2 from the air. If you fail to provide the growing area with fresh air, the plants will use up all CO2 in the air. Growth will slow down and plants will become less healthy. An extraction system sucks the CO2-depleted air outside, which automatically brings CO2-rich air inside. The system also removes the typical odors that are released during the flowering phase. A carbon filter is a large tube filled with carbon. The carbon absorbs the chemicals responsible for the odors and neutralizes them. Carbon filters do not last forever, so I replace mine every year.
A dry, not too cold cellar is probably the most ideal growing place. However, it can be hard to supply and discharge air and also the discharge of water can be problematic. On the other hand, cellars hardly ever need to be made light-tight. It is also fairly easy to control the temperature because cellars are insulated thanks to their underground location.
If you have chosen a growing place, you have to make sure it is 100% light-tight. For optimal growth, the plant needs 12 hours of uninterrupted darkness and 12 hours of uninterrupted light. If this process is disturbed, this can affect the yield or even cause the whole crop to fail. The plants become stressed and confused. So double check whether there are no holes or cracks where light seeps through. If this is the case, seal them with sealing or non-transparent tape.
Micro growing is usually done using soil, as setting up a soilless or hydro system in a space as small as a mini-fridge can be very difficult. So, to accommodate the lack of space that qualifies a micro grow, you’ll want to use less soil to prevent your plants from outgrowing their small room or tent.
The root system is a crucial part of the plant, and its size has a great influence on how tall the plant will grow. Most plants tend to occupy the same amount of space below the ground as they do above. In a micro grow, we can use this correlation between the size of the root system (thus, the amount of medium) and plant size to control the growth of our cannabis plants and match it to our spatial limitations.
Finding the Right Grow Light
Worried you don’t have the space to grow great weed? Well, don’t! With micro growing, you can grow superb bud in the smallest of spaces.
Thanks to new and improved grow gear (especially grow lights) and an increase in knowledge concerning the cannabis plant, micro growers are able to churn out great harvests in extremely small spaces.
As with any cannabis grow, it’s important to set yourself some realistic expectations regarding the size and quality of your harvest, as well as the amount of time it’ll take you to get from seed to harvest.