The Ultimate Indoor Weed Growing Guide

We are honoured that you have decided to learn how to grow cannabis indoors from The Weed Blog. Before you dig your hands into the dirt, it’s critical to understand the legality of cannabis cultivation in your area to avoid unpleasant interactions with law enforcement or serious legal consequences. Investigate your state and local marijuana laws to ensure you’re growing legally. Regardless of any local permits for cannabis cultivation, the practise is still illegal on a federal level.

You have complete control over the environment when growing cannabis indoors, and you can save money while producing high-quality cannabis! Furthermore, there is a distinct satisfaction in growing your own. Many cannabis enthusiasts claim that they didn’t appreciate the plant fully until they grew it themselves.

The main advantage of growing weed indoors is that you have more control than when you grow it outside. Growing indoors allows for the implementation of strategies such as introducing high levels of CO2, which results in larger buds with higher THC concentrations.

While there are numerous advantages to growing indoors, there are some potential issues that could be costly or disastrous to your crop if you are not careful. You should be confident in your ability to produce a successful cannabis harvest before making a significant financial investment. Your time and effort will be significant as well; no one wants to spend weeks in a garden just to produce compost pile fodder.

Getting Your Garden Ready

Before planting seeds, make sure you have all of the necessary materials for a successful indoor cannabis grow. We’ve compiled a list of general materials required for a successful harvest:

You must choose an area in which to expand. It could be a closet, an indoor grow tent, a spare room, or the basement.

Invest in indoor grow lights. These are available in a variety of styles, but for beginners, we recommend HPS (high pressure sodium) lights.

Find and buy seeds that interest you.

Selecting Your Seeds

When deciding what type of cannabis plants to grow, choosing the right seeds is critical. The colour, height, quality, and aroma of the plant are all determined by the seed’s quality. Avoid seeds that are cracked, soft, pale, or green. These seeds are not mature enough to begin the germination process, which may result in weak plants or, worse, no plants at all.

Good seeds will be dark brown, teardrop-shaped, and encased in a hard shell. Darker tiger stripes indicate indica seeds, whereas brown mottling indicates sativa seeds.

The most important consideration when selecting seeds is whether they are regular or feminised. Feminized seeds are typically more expensive, but most growers agree that the cost is well worth it. Feminized seeds guarantee that the plant will be female 99 percent of the time. This is significant because female plants generally produce larger buds, and if a male plant is present, the female plants’ growth will be hampered.

Regular seeds can produce both male and female plants, but using them is risky because they can drastically reduce the size of your harvest if they produce male plants. As a result, novices should strongly consider using feminised seeds.

How do you get your seeds to germinate?

Planting your seeds directly into a grow medium is the simplest way to germinate them. A seedling plug is another common method for germinating seeds. Plant the entire plug after germination, and you’ll be on the right track. If you’re growing hydroponically, you should always use seedling plugs.

Keep in mind that not every seed will thrive when deciding on the number of seeds to plant. It is common practise to assume that 10 – 20% of the seeds will not germinate, so make sure to overestimate. The time it takes for seeds to germinate depends on a variety of factors, but seeds typically germinate in 2 to 7 days.

For new growers, practising the germination process on inexpensive seeds may be beneficial because you don’t want to risk ruining a costly batch while you’re still learning how to grow properly.

The Soaking Technique

The soaking method, which is a reliable and simple process, is one of the most effective ways to germinate cannabis seeds. Fill a cup halfway with warm water, then drop in the seeds and look for the ones that float. Remove any floaters from the cup and cover it with a lid. Within 24-48 hours, the roots will begin to sprout. Transfer the roots to your grow medium once they have grown about a quarter inch. Because the small sprouts are delicate, you must exercise extreme caution during this process.

Germination Suggestions

When seeds are kept warm, the germination process is sped up. When the seeds are ready, place them about two inches deep in the grow medium. It is critical that the seeds remain moist but not soaked. If the seeds dry out, the process comes to a halt.

Older seeds germinate at a slower rate and frequently have lower germination rates than newer seeds. Even with fresh seeds, however, some strains germinate better than others. Don’t be concerned if your seeds take a while to germinate. Isn’t patience a virtue?

Watering Seedlings

Inexperienced cannabis cultivators frequently overwater their seedlings, resulting in a variety of issues such as sluggish growth, droopiness in the plant, or nutrient deficiencies. Watering your seedlings properly is essential for their growth so that they can be strong enough to support large flowering buds.

When watering your seedlings for the first time, give them 2 cups (500 millilitres) of water per seedling. Pour the water in a small circle around the seedling’s base to ensure you’re watering it rather than the dirt. Before watering again, wait until the top part of the soil is mostly dry.

As your seedling grows, gradually increase the amount of water so that the circle around the base is about the same width as the leaves. However, keep in mind that different grow mediums will necessitate varying amounts of water. Seedlings should be watered every 2-3 days until they are no longer seedlings. When your seedling is a few weeks old, it should have a strong root system capable of withstanding more water.

Once you’ve transplanted, return to your regular watering routine. This generally means that you should water your plant until there is a slight runoff near the bottom, but don’t let it sit in the runoff water. Before watering again, wait until the top inch of soil feels dry to the touch.

If you decide to grow in Coco Coir or hydroponics, it is critical to add nutrients to the water because Coco Coir and other hydroponic grow media lack sufficient phosphorus, nitrogen, and potassium to support plant life. Potting soil, on the other hand, only requires a small amount of extra nutrients.


When your seedlings are ready, transplant them into your garden. Transfer the seedlings from their small containers to larger containers so that they can continue to grow properly.

It is critical to complete this process with as little light as possible so that the plants have time to adjust to their new surroundings before the next cycle of photosynthesis begins. Transplanting can damage the root system, causing the plant to become stressed. Allowing adequate settling time will also help to alleviate this stress.

The Vegetative Period

Your plants will begin to produce new stems and leaves without buds during this stage of development. Taking care of your cannabis plants at this stage is relatively simple, especially if you have previous gardening experience. Water the plants on a regular basis, or keep the water reservoir full if you’re using hydroponics. To keep your plants from dying from overheating, adjust the grow lights on a regular basis as they grow taller.

Examine the leaves for discoloration or droopiness. Removing discoloured leaves from your cannabis plant will help the plant focus its energy on growing buds rather than trying to revive the leaves.

Cannabis plants recover quickly during the vegetative stage. Make every effort to provide your plants with enough water, nutrients, and light. If you make a few minor mistakes, your plants will most likely recover after being corrected.

The Flowering Period

Your plants should begin flowering once they have grown to half their final desired size. The flower produced during this stage will be processed to become smokable buds, making it the most coveted growth stage among cannabis enthusiasts.

Set your grow lights on a timer with a 12/12 light schedule to begin the flowering stage. This means that the lights will be turned off for 12 hours and then turned back on for 12 hours. Ensure that the plants are completely dark during the dark period, or the buds will not grow properly. The key to this process is to ensure that the grow space is completely dark.

Your plant will grow quickly after the first few weeks with the 12/12 light schedule. The “flowering stretch” refers to this period of especially rapid growth. During this time, many cannabis cultivators boost the growth of their buds by providing CO2 to their plants and switching from regular nutrients to bloom nutrients.

After switching to a 12/12 light schedule, your cannabis plants should begin to grow buds within 2-3 weeks. When your plants begin to bloom, double-check to ensure that they are all female. Male plants will produce pollen sacs that are easily identified at stem junctions. If you come across any male plants, remove them right away and place them in plastic bags to prevent pollen spread. The presence of male plants will reduce your flower yield significantly.


The amount of water required for your indoor cannabis plants is completely dependent on

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