Guide to Grow Medical Marijuana at Home

Marijuana can be grown at home legally and here the fundamentals would be shared and discussed. Frequently asked questions include:

  • Where can I buy good Marijuana Seeds?
  • What Marijuana Strains should I grow?
  • What kind of Soil should I use?
  • Should I use fertilizer? If so, how much and how often?
  • What kind of equipment do I need to grow cannabis?
  • What kind of lighting is best for cannabis strains?
  • How do I know when it’s time to harvest?
  • Do you have any special tips for a beginner on growing Marijuana?


How to grow marijuana indoors at home – mmjdoctor guide



   Are you legal to possess, grow and use Medical Cannabis?

Who can legally grow marijuana? If you want to grow medical pot legally in California, you’re going to need either a medical marijuana card from a licensed mmj doctor or a cultivation permit/growers license.  With a Medical Marijuana recommendation and Grower’s permit patients can cultivate up to 99 plants / possess 8 oz. or more of Medical Cannabis. You can apply online to get a medical marijuana card or growers license here at


Check out local Cannabis Regulations

It is a good idea to go online and check out the latest regulations and news regarding MMJ at your local city hall. With that out of the way, let’s get down to business.


Focus, Grasshopper

“I have lived with several Zen masters – all of them cats.” – Eckhart Tolle


Let’s put get it started.  It is not difficult to grow Cannabis but at the same time it is not difficult to mess it up.  Cannabis is not called a pot for nothing.  Pot can grow wild everywhere south of the 40th parallel basically. There are different cannabis strains that are bred for moderate, subtropical, semi-arid, mediterranean and tropical climate zones.

When you pick a cannabis strain to grow, the weed will grow best when you emulate the climate it’s genetics are adapted for. You can grow a big fat palm trees in Los Angeles but in San Francisco they can be skinny and skimpy. Beginners should pick a variety that grows excellently in and outdoors.


What kind of Marijuana do you like?

For a beginner, older strains which have been time proven should be used. The newly evolved strains when cultivated tend to be less stable and hardy. For the first time of cultivation, pick a strain that would fit the desired use you envision. If you have grown vegetables or flowers before, growing marijuana indoor won’t be a problem. Cannabis is a flowering plant which bears fruits once a year in the fall when daylight is shorter compared to other times. If it’s grown indoors, this can be manipulated for it to bud when desired and to be harvested. It can be exposed to sunlight for 12 hours plus when still growing. If the light is cut off indoor prematurely, the plants would blossom at their infancy and the harvest would be poor.

Also the right time of soil would be needed in its indoor cultivation. Potting soil can be purchased at a good gardening shop. To the soil to be used, 10% sphagnum can be added for a good effect. The soil would need to be stirred to break up the soil particles hence enabling air penetration into the root of the plants while some people go ahead even to pump in carbon dioxide which has been seen to pump in yield by about 40%. Bird shit or guano can be used as fertilizer. Guano can also serve as organic fungicide but it has to be used in small quantities.

Growing healthy seedlings is key. Cannabis plants start as seeds and they require a humid condition to germinate as well as nutrients. The seeds are first soaked in non-chlorinated water at a temperature of 65-70 °F (18-21°C) and observed daily until the seeds swell and split open sprouting out with tiny roots. This should occur in three days to a week and the seeds can remain in water for a week without any problems but not to exceed 14 days of which after that it would start dying. In choosing seeds, feminised seeds are preferred and it increases your chances of growing a female plant.

A good looking seed would lead to good buds but depending on the strain, seed size would vary. Indica seeds tend to be large with stripes while that of sativa are generally smaller when compared. In recognising good seeds, they are hard and dark brown with spotting; pale, green, cracked or weak looking seeds.


How To Grom Cannabis At Home

Start your Engine – Get your Pots

First and foremost, fill the pots halfway with the soil bought and make a ½ inch hole in soil and drop the seed in the soil but with no fertilizer. Fertilizer would fry the seeds and if the seeds grow, it could result in mutations. After placing the seed in the soil, it’s covered slightly with soil. In a week, the seed would sprout rearing its stem up. The soil needs to be kept moist daily but care should be taken not to drown the plant.

The first eight weeks of growth is the vegetative stage and the plant needs about 18 to 24 hours of light. Good quality of light and exposure is important to have a good crop of marijuana. Photosynthesis is quite fundamental for its survival; water, air and sunlight is necessary for photosynthesis to produce sugar. This sugar is then polymerised into cellulose or fibres which make up most of the plant material. This also serves as raw material for the production of other substances as terpenes, sterols, cannabinoids, oils, CBD, THC and the rest.

Water+ Carbon Dioxide + Light = Sugar + Sugar = Cellulose

For indoor growing, a good light source such as LED lighting is recommended. Each plant is lighted with a 5watt LED bulb placed a few inches above the seedling. LED lights are quite energy efficient and since heat isn’t given off, it doesn’t cause dehydration of the plant as compared to other sources. The room temperature should be between 72-78 degrees Fahrenheit. And importantly, the nutrients should not be added to the seedlings until after a week after sprouting. The soil should also be kept moist  by spraying water at least once daily while twice would be more efficient.

Starting off on the right point leads to healthy infants which leads to disease resistant plants. With a good soil, seed and and right grow lights for your personal growing environment, the right growth conditions, the plant would be very healthy after three weeks. The plant begins to increase in height at a rate of 3 to 6 inches per week and starts forming its leaves.marijuana-grow-MMJDOCTOR If the leaves look burned, it is indicating too much nutrient. This should be stopped altogether. The plants can also be transplanted when the roots begin to grow out from the pot. Space is needed for growth of marijuana because once its root system has no space, it stops growing. In cases of transplanting, a one gallon pot is ideal for the seedling.

Right after the vegetative stage which is about two months, the plant can then be triggered (the seed supplier can usually provide information regarding expected plant size and keys to harvest optimally) to flower and bud. At this stage, the lighting schedule for the plants is changed from the previous 18-24 hour time to a 12 hour cycle of light and no light. During the 12 hour exposure time to light, the intensity of light provided is doubled up when compared to the previous schedule and then complete darkness for the next 12 hours. It is important that there is no light leaks during this phase as it can stress the plant and disrupt the flowering process which could lead to the formation of hermaphroditic plant or low quality bud yield. This has been observed to produce maximally for most varieties.

The hardest part of growing marijuana could be to decipher when to harvest.

“The beginning of the harvest window opens when your plant has mostly stopped growing new white “hairs” or pistils and at least 40% of the white hairs have darkened and curled in. Harvest when 50-70% of hairs have darkened for highest levels of THC. Harvest when 70-90% of hairs have darkened for a more calming, anti-anxiety effect as some THC turns to the more relaxing CBN. ”  -. online source

First timers in the cultivation of the weed tend to make the mistake of early harvest due to excitement probably. This premature harvest leads to lower yield and potency. To ascertain the time of harvest, a bud could be plucked and tested for its potency. This is most advisable for a first time grower. The harvest window should also be looked out for. This is the time the plant stops growing new white hairs on the pistil and about 40% of the previously grown ones have darkened in colour and curled in. the harvest can then be done when 50- 70% of the hairs have undergone the above phenomenon as THC is at its highest levels but if a more calming effect is required when used as with time THC is converted to CBN, it should be harvested between 70-90% darkened hairs.

Finally, there is still a lot to know when considering the cultivation of medicinal marijuana but this simple information discussed above could help in the germination of healthy plants if properly applied.



MMJDOCTOR:  We provide patients with Medical Marijuana Cards that allow California residents to grow, possess, use and transport Medical Cannabis.   You can talk to our licensed doctors 7 days a week 11 am to 7 pm. Click here to schedule your in-person appointment.

Now, You can get your  growers card, cultivation license, medical marijuana growers permit online sign up at




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