No announcement yet.

Growing cannabis indoors

  • Filter
  • Time
  • Show
Clear All
new posts

  • Growing cannabis indoors

    Choosing a variety is of major importance.
    Yields and quality of plants grown under artificial lights mostly depend on:

    1. the seed variety,
    2. whether the plants are grown from seeds or clones,
    3. after how many days of growing the plants are put into flowering, and
    4. the optimization of the climatic conditions of the grow-room.
    Apart from "true breeding" varieties, our seed collection consists of different F-1 hybrids. Crossing two "true breeding" strains (hybridizing) gives F-1 hybrids that possess the so-called "Hybrid Vigor". This means that the F-1 generation is a lot more potent than either parent. F-1 generations also consist of uniform plants.

    Growing cannabis indoors has seen a dramatic rise in popularity in recent years. When done properly it produces excellent quality stash which is usually much better than that sold on the streets. Growing cannabis indoors relies on the use of powerful artificial lights to replicate the effect of the sun. These lights typically take hundreds of Watts of electrical power to run and are commonly HPS (High Pressure Sodium) but fluorescent lights, metal halide, LED light and other kinds have all been used successfully.

    Cannabis loves light and the successful indoor grower tries to deliver as much light as possible. Consider 250 watts/m˛ only as a minimum starting point and realistically aim for 2-3 times that level if possible. More light will mean bigger, denser buds and superior yields. As well as delivering high light levels the successful indoor grower keeps the plants as near the light as possible to maximise the light intensity reaching the leaves and buds. Often the personal medical or recreational grower will have a growing area of 1-2 m˛ designed below a single 400W or 600W high pressure sodium (HPS) lamp.

    The indoor cannabis grower has to be careful that the plant doesn’t grow too near to the hot light and damage itself. If the light feels cool to the back of the hand it will be cool for the plant also. For a 400W lamp, growers may not want to allow plants to grow within 40-50cm of the bulb. Cannabis plants can be bent over and tied if they get too tall, some indoor growers deliberately train their plants this way to get as much of the plant as possible close (but not too close) to the high intensity light.

    Certain strains respond well to having the growing tip of the plant pinched out (known as ‘topping’, ‘FIM’ or pinching) after the 4th or 5th leaf pair. The resulting plants are often smaller and bushy without the dominant main growth stem (or ‘cola’) and are preferred for some smaller growrooms.

    Some indoor growers train the plants underneath a metal chickenwire-style screen allowing only the buds to grow vertically while the stem and growing part of the plant grow horizontally. This SCROG (screen of green) technique allows the indoor grower to keep as much of the bud growth as possible equidistant to the lamp, maximising the efficiency and yield.

    Specialist suppliers offer ‘air cooled’ lights for the indoor grower that enclose the light in a glass casing. A fan forces air over the light and outside the growroom via tubing, keeping the grow room cool and allowing the plants to grow taller without burning.Grow rooms are typically kept between 24°C -30°C for optimum results. Higher temperatures can cause the plants to wilt and cooler temperatures may slow down growth. The plants will need a gentle breeze from a fan, and a steady supply of fresh air which can be from your house or from outside. Stale air from the growroom is normally continually extracted outdoors by a fan and de-odorised with a carbon filter.

    Those indoor growers that do get caught are often betrayed by the smell of their growroom, so some also invest in ozone generators to further remove odours from the exhausted grow room air.

    Germinating cannabis seeds can be done in various ways and the internet is full of cannabis grow forums that document various methods. One simple method is to simply place seeds about 1cm below the surface of firmly pressed damp soil. A film of kitchen cellophane over the surface helps keep conditions moist and after a few days of temperatures around 20-25°C the seeds should germinate. Growing from cuttings of ‘mother’ plants is an alternative to growing from seeds.

    In the first stages of life the seedlings are happy to start with lower light intensities often a metre below an HPS light, or closer to fluorescent lights. The artificial lights are normally ‘on’ for 18-24 hours per day. During this time the seedlings are in a state of vegetative growth, they will continue to grow roots, leaves and branches but no bud.

    By reducing daily light to ~12 hours the cannabis plant transitions into the ‘flowering’ phase. This stage normally requires 8-10 weeks (but more for certain strains) and it is during this time that the female flowers form. During this stage the plants gain a lot of bulk and will tolerate more nutrients and very bright light.Some growers introduce supplemental lighting to ensure the very best yields. At the end of this process the plant is cut down and the buds (unpollinated female flowers) are dried. Some growers harvest the plants when they see the trichomes start to transition from clear to cloudy (this requires a powerful magnifying glass/scope to see). This often coincides with the bud producing lots of red/orange pistil hairs. Some smokers prefer bud harvested early, others prefer late- harvested bud. When growing- your-own it is you that decides exactly how you like it!

    In general, longer periods of vegetative growth will grow larger plants and support greater yields during subsequent flowering. Typically 2-6 weeks of vegetative growth are used and during subsequent flowering the plants may increase to 2 or 3 times their original height. Some growers use the ‘sea of green’ (SOG) method, this uses just a few days of vegetative growth before switching to ‘flowering’ conditions. This technique produces small plants of low/medium yield, but allows for fast production.

    Male plants are nearly always destroyed by the indoor grower as they don’t yield any buds, and given the chance they will pollinate the female plants reducing them to seed.

    Feminised seeds are popular with the indoor growers as they virtually eliminate the possibility of male plants. For many indoor growers feminised seeds from a quality supplier are regarded as the only way to go. If male flowers appear at the end of a female flowering cycle don’t panic, simply pinch off the male flowers. The female buds are mature and unaffected by the appearance of isolated rogue male flowers late in the flowering cycle.

    The indoor growroom allows plants to be grown in soil or any number of other grow mediums. When growing in soil the cannabis plant benefits from 25% perlite or coco fibre being included. This allows better aeration of the soil. One common mistake by inexperienced growers is the tendency to overwater soil-grown plants. Get to know the weight of your plant pots and water only when the plants need it. Over watering soil-grown plants will reduce yield/quality and slow down plant development.

    Growing cannabis indoors will require use and understanding of plant feeds. This is not complicated, all the plant feed does is deliver essential nutrients to the roots, it doesn’t matter whether the roots are growing in clay pebbles, rockwool, coir or a hydroponic system. Even soil-grown plants will need additional nutrients when the soil has been depleted. Read the instructions on the nutrient labels and avoid the beginners temptation to exceed recommended levels. The experienced gardener can ‘read’ his plants and will learn when to water and feed plants.

    Indoor growing allows the plants to develop under closely supervised grow conditions without the normal array of outdoor pests. Once the grower has the right system in place it is a predictable way of growing great quality cannabis, a lot better than weed sold by street dealers. The main challenge for many indoor growers is dealing with the characteristic cannabis smell so that no-one notices it.

    Recreational and medical cannabis popularity now extends far outside the earths warm/tropical climates, so for many growing cannabis indoors is the only option. Growing cannabis indoors has never been as popular as it is today, nor has it been as easy to produce superb quality weed. Professional seed suppliers, equipment providers, advice and information are all available on the internet.

    Of course it all really begins with great quality seeds – get them from a supplier you can trust.

  • #2
    Nice post. Thanks for sharing rugged farmer.


    • #3
      this seems like a good lecture for attentive students. Nice one ruggedfarmer


      • #4
        I've been straggling on starting my first marijuana plant I have no idea that planting would be this complicated, a lot of things to consider. I'm trying to grow this decided to grow my own just for personal use and it's been very effective on treating my chronic back pain


        • #5
          Growing cannabis indoors is easy. You can buy everything you need online, or from your local garden centre / grow shop. Don’t worry if you have never grown cannabis

          indoors before, it’s not complicated and most people can master the basic skills quickly. Read on to learn more about: Choosing the best cannabis genetics

          Designate a Cannabis Grow ‘Room’ or Space
          Choose Your Cannabis Grow Lights
          Give Your Cannabis Plants Air
          Pick Your Controls and Monitoring
          Decide on a Cannabis Grow Medium
          Determine What to Grow Your Cannabis In
          Feed Your Cannabis Plants Nutrients
          Water Your Cannabis Plants


          • #6
            Knowledge Center
            10 Smart Tips for Successfully Growing Marijuana Indoors
            Growing your own cannabis can be a great and fulfilling venture, but there are certain struggles that people encounter if they’re not prepared enough. But worry not, all the headaches and wasted material can be prevented with some preparation and well selected information. It`s all goes down to being prepared, putting in some effort and laying down the foundations for a hassle free growing process.
            The internet is a huge place where you can get lost among all the advices, so we’re presenting you this list of 10 smart tips that will help you grow cannabis indoors without any trouble.
            1. Start With The Right Genetic Material
            This is arguably one of the most important steps in the growing process. A plant with good genes will set a solid foundation for everything else. No amount of efforts can help a plant with bad genes grow better, so do your research and make a proper choice.
            Don`t grow from a clone and start with a seed. A clone is much more likely to develop diseases, get pest infection or just be inherently weaker. Look for strains that are known for their thick buds and potent qualities.
            2. Prepare The Growing Space
            Growing cannabis successfully is all about planning. Decide how big you want your operation to be beforehand otherwise you might end up having too many plants growing in an insufficient space.
            Also, make sure that there is proper ventilation and room for any additional equipment such as grow lights, containers and miscellaneous materials. Ideally the room should be sealed and prevent any smell or light from escaping.
            3. Good Soil And Fertilizer Management
            A good quality natural soil is sufficient and can provide the plant with the necessary supplements and nutrients. If the soil is of good quality it will require no further additives or at least no sooner than the last stages of growth.
            Be careful if you`re adding fertilizer, don`t go too far or the plant might experience burns, leaf harm and an overall weakened state. Always make sure to use reputable products and make research prior to purchasing.
            4. Providing Proper Light Conditions
            Light is one of the most important aspects to successfully growing cannabis, and luckily one that can be very accurately controlled. Modern equipment like LED grow lights for marijuana provide the perfect tool for the purpose.
            optimally cannabis requires light in differentfor each growth stage. One of the most useful features is the adjustability of the light spectrum, enabling for the crafting of special light recipes and catering perfectly to the plant`s needs. For example, it`s best to have light in blue spectrum during the vegetative stage, whereas light in the red spectrum helps the plant develop bigger buds during the flowering stage.
            To grow

            5. Grow Room Temperature
            Room temperature is vital for the photosynthesizing of the plant, if the room cold then the plant will evaporate less through its leaves which leads to reduced nutrient absorption overall.
            • When the lights are working the recommended temperature is from 68F to about 77F. As the plant matures the temperature can be increased to 81F.
            • When the lights are not working the recommended temperature is from 62F to 72F. Try to keep the difference between the light and darkness cycles to no more than 50F. If you`re temperature during light cycles is 75F, then the one during dark cycles shouldn`t be less than 65F. Optimally, the difference should be 25F.
            6. Pinch, Pluck, Prune And Be Patient
            These are the so called Four P`s of growing cannabis. It is a method for growing bushier plants and achieving bigger and thicker buds.
            Pinch off the middle growth point on the top of the plant for to stimulate a bushy expansion, but only if the plant is not less than 2 weeks away from budding. Then pluck away any leaves that are blocking the light from penetrating any growth points, but be moderate and don`t go overboard. Also, don`t forget to prune as the process creates a controlled and beneficial stress on the plant. Lastly, patience is a key. Don`t rush the steps and monitor the process as the plant develops.
            7. Keep The Area Clean
            Keeping the grow area clean is another essential thing to keep in mind. While it may sound self-explanatory it`s still worth mentioning due to the susceptibility of cannabis to disease. Naturally, you want to keep the plant from developing any diseases. The best way to do that is to wash your hands and clean your tools every tie before handling the plants.
            8. Good Air Circulation
            Having a well ventilated grow room with free flowing air is another important aspect. All professional growers are aware that the quality of air can make that subtle difference in quality that makes great into amazing.
            If you`re growing less than 3 plants of up to medium size it`s sufficient to use two oscillating fans. If you`re growing more plants it means that you need more grow lights, which generate more heat and require the usage of more fans and a better air circulation system.
            9. Harvesting At The Right Time
            Make sure that you don`t harvest too early or late. The buds have reached maturity when the white hairs have changed their color to rusty red or even brownish. It`s also common practice to harvest a few buds on separate stages in order to determine exactly which one yields the best results. As the THC in the plant matures the effects get “stonier” so to say.
            10. Drying And Curing
            This is the final and sweetest step in the growing process, but certainly not one that should be neglected in terms of preparation. Some professionals even say that what you do after harvesting is just as important as the processes before that.
            Drying and curing properly helps the buds be more aromatic, have better appearance and even increases potency. First dry the buds nicely without rushing the process and then cure them in jars for up to a month in order for them to get tighter.
            We hope that these 10 smart tips have made the process of growing cannabis indoors a bit more clear and inviting. Follow the basic guidelines and you should do just fine. Remember that growing is a long-term dedication and every setback teaches you a lesson that you can later use to your advantage. Monitor the plants, respond accordingly and don`t overdo things.
            Last edited by Cheng Young; 10-17-2018, 10:14 AM.