Before I get to the more effective methods, I have to make sure you know about these basics first. If your cannabis plants are stressed due to environmental factors being out of whack, your yields will surely be affected. Bringing those factors back in line will help you maximize your indoor cannabis yields before you even start the more significant methods.
Temperature:
Cannabis seeds grow best at 78 degrees Fahrenheit. After the seedling stage, 72 to 76 degrees Fahrenheit is more appropriate. If you’re using CO2, you can allow your grow tent temperature to increase up to 85 degrees Fahrenheit.
Humidity:
Cannabis plants in the seedling and vegetative phase grow best with 60% to 70% humidity. Cannabis plants in the flowering phase grow best with 40% to 60% humidity.
Get yourself a humidifier that’s large enough that you don’t have to refill it every few hours. Also ensure it has a setting for different humidity levels.
Watering:
Watering cannabis plants properly can be tricky. Younger and smaller plants will need less water, but their needs will increase gradually as their size and age increases.
My recommendation to growers asking me about watering is not to stick to any one schedule, but inspect the soil by sticking your finger inside and water each time its dry below the surface.
Soil pH:
Cannabis soil pH should be kept between 6.5 and 7.0. Failure to stay in that range will affect your plants’ ability to uptake nutrients, and thus affect your ability to maximize your indoor cannabis yields! It can also lead to browning of leaves.
Hydroponic pH:
A pH of 5.8 to 6.5 is ideal in hydroponic grows. Failure to maintain this range of pH will affect your plants’ ability to uptake nutrients, and thus affect your yields!Testing and adjusting your soil pH is easy and inexpensive. This all in one kit is perfect for the job.
Airflow:
Proper airflow in your grow tent or grow space will prevent mold and mildew from taking root and affecting your cannabis yields. In addition to your inline fan, you should have an oscillating fan running to maintain proper airflow.Planter or Grow Bag Size:
Make sure you’re using a minimum 5 gallon planter or grow bag. Grow bags are better because they allow more oxygen into the soil and allow excess moisture to escape. The more room the roots have to grow, the larger your cannabis plant can grow, and the larger the yield will be.
Everyone knows that light is essential for plant growth. However, many cannabis growers do not pay attention to the details of how much light is actually needed to maximize indoor cannabis production.
The scientific name of light intensity is photosynthetic photon flux density, and its unit of measurement is called mole and micromole (1,000,000 micromole = 1 mole). Cannabis plants need a certain amount of light every day.
How much light can maximize cannabis production:
In order to achieve this goal, you need a growth lamp that can cover your growth space from corner to corner under strong light. Many cheap grow LED lights claim that they cover a much larger area than the area where cannabis is really beneficial.
Based on our results, it is concluded that if grown at ~1500 μmol m-2 s-1 PPFD and a temperature of approximately 25 to 30 C, C. sativa can use a fairly high level of PPFD and temperature for gas-water exchange Process status. 1500 PPFD is very powerful and can only be obtained by choosing the number of LED plant growth lights. However, you can maximize indoor cannabis production by increasing any amount of light intensity, as long as you change from a lower intensity to a higher intensity. Cannabis is a flowering plant. Like other flowering plants, the yield increases linearly with increasing light intensity. Therefore, even if you replace the cheap 400 PPFD LED grow light with a better 900 PPFD LED grow light, your cannabis production will still increase substantially!
Let’s introduce two HID plant growth lights and full-spectrum LED plant growth lights that are most suitable for cannabis growth.
ECO Farm HPS/MH 1000W Double Ended Grow Light Hydroponic Grow Kit

Description:
1,Double ended, high efficient and high frequency supplemental lights.
2,100KHZ high frequency output make it compatible with high efficient and high frequency light source.
3,Secure and full digital circuit have the high reliability.
4,Powerful capability of communication can connect each IOT intelligent system.
5,Perfect distribution of light and high reflectivity.
6,Perfect mechanical design and easy to remove and maintain.
1000W WATT DOUBLE ENDED MH BULB
MH grow light bulb can produce a very balanced and efficient spectrum for plant growth. Doulbe ended MH lamps have higher luminous efficiency than ordinary bulbs, and they have stronger penetrating power and long service life. It emits an enhanced blue and violet spectrum that is among the most energy-efficient sources of indoor lighting and extends the growing season. It can be used through the stage of plant germination and leaf growth.
ECO Farm 480W V3Pro Samsung LM301H Movable LED Grow Light

Item:480W V3Pro
Spectrum:LM301H 3500K + Epistar 660nm
Led Diodes:1024PCS LM301H +192PCS 660nm Epistar
Total Led Quantity:1216PCS
Power:480W MeanWell Driver HLG-480H
Voltage Range:100-277V
Photon Efficacy:2.6µmol/Joule
Lamp Luminous Flus (Lm):76800Lm
Efficiency:160Lm/w
Total output - PPF:1262μmol/s
PPFD at 40CM:1923μmol/m2/s
Flowering Footprint (coverage):4*4ft
Veg Footprint (coverage):5*5ft
Collor temperature (K):3500K
Frequency:50/60Hz
Full spectrum Samsung LM301H 3500K +660nm Red suitable for all stages of indoor growth providing like sun quality full spectrums for rapid plant response from vegging to flower. Compared with other LED grow light, illuminated area of this light is 6% larger, reaching an incredible size 5x5ft for veg and 4x4ft for bloom. The most efficient Samsung LM301H LED technology provide light output PPF up to 1262μmol/s, high energy efficiency at 2.6umol/J.