Indoor Weed Growing Guide

Before you dig your hands into the soil, be sure you know the laws in your area regarding cannabis farming. To cultivate lawfully, check the local and state marijuana laws. Despite any local cannabis-growing permits, the activity remains illegal federally.

Indoor cultivation gives you complete environmental control and allows you to save some dollars while achieving higher cannabis! Growing gives you a unique sense of achievement. It is said that many cannabis lovers haven’t enjoyed the herb until they have.

Indoor weed cultivation offers you more control than outdoor weed growing. Indoor growing allows for increasing CO2 levels to produce larger buds with higher THC contents.

While growing indoors has numerous advantages, some drawbacks can be costly or fatal to your crop if not appropriately addressed. You need to be confident in your capacity to produce a good cannabis harvest before making a significant financial commitment. It will also take a lot of time and work; no one wants to spend weeks in the garden to produce trash.

Garden Setup

Preparation is vital before planting seeds. To ensure a successful harvest, we’ve included the following materials:

  • Find a growing area. It could be a closet, extra room, or basement.
  • Get indoor grow lights. Beginners should use HPS lights.
  • Choose a growing medium: soil, coco choir, or hydroponics.
  • Invest in good nutrition.
  • Find and buy interesting seeds.

Selecting Seeds

Selecting suitable seeds is crucial when growing cannabis plants. The seed quality determines the plant’s colour, height, quality, and aroma. Avoid damaged, fragile, pale, or green seeds. These seeds are not ripe enough to germinate, resulting in weak or no plants.

Good seeds are dark brown, teardrop-shaped, and hard-shelled. Indica seeds have darker tiger stripes, while Sativa seeds have brown mottling.

Choosing regular or feminized seeds is critical. You can buy weed seeds because Feminized seeds are more expensive, but most growers feel it’s worth it. Feminized seeds ensure 99% female plants. Because female plants develop larger buds, male plants present will limit the activity of female plants.

However, using regular seeds is risky because male plants might drastically reduce your crop. Beginners should use feminized seeds.

How to Germinate Seeds?

The next stage after purchasing cannabis seeds is germination. A growing medium is the simplest way to germinate seeds. A seedling plug is another standard method to germinate seeds. Plant the complete plug after germination to ensure proper growth. If you grow hydroponically, always use seedling plugs.

Remember that not all seeds will germinate. It’s safe to predict that 10-20% of seeds may fail, so they tend to underestimate. It would take a seed to grow varies, but it usually is 2-7 days.

Beginner gardeners should try germination on inexpensive seeds first, rather than risk damaging a costly batch while learning the basics.

Method of Soaking

The soaking method is one of the most successful and simple ways to grow cannabis seeds. Then check for the seeds that float in a cup of warm water. Remove any floaters and lid the cup. In 24-48 hours, you will see roots develop. Transfer the roots to your grow medium once they have produced a quarter-inch length. The delicate tiny sprouts require extreme caution throughout this operation.

Tips for Germination

Warm seeds help germination. Place the seeds in the medium two inches deep once they’re ready to go. Keeping the seeds wet but not soaking is critical. Soil drying stops the process. In general, older seeds germinate slowly.

Seedling Watering

A lack of nutrients or sluggish development is a prominent topic asked by newbie cannabis growers on Seed Supreme that they accidentally overwater their seedlings. Maintain the health of your seedlings by watering them regularly.

Provide 2 cups (500 ml) of water per seedling the first time. Pour water around the seedling’s base to prevent wetting the soil. When the soil is often dried, rewater.

Increasing the water gradually until the circle around the seedling’s base equals the leaf breadth. The amount of water required varies per grow medium. To be set, seedlings require watering every 2-3 days. It should have a robust root system and withstand additional water when it is a couple of weeks old.

After transplanting, return to a regular watering routine. That is, water your plant till there is a little runoff near the bottom, but don’t let it sit in the runoff water for too long. Water again only after the top inch of soil seems dry.

Because Coco Coir and other hydroponic grow media lack phosphate, nitrogen, and potassium, it is critical to supplement the water with nutrients. Nutrients for potting soil are modest.


You must transplant your seedlings into your garden when they are mature. Move the seedlings from their small containers to larger ones to grow appropriately.

That way, the plants have time to adjust to their new surroundings before the next cycle of photosynthesis starts. Transplanting can cause root damage, causing stress to the plant. Relaxation time is also essential.


You’ll see fresh stems and leaves without buds at this stage of development. Taking care of your cannabis plants at this stage is easy if you’ve ever gardened! Regularly water your plants, or keep the hydroponic water tank full. Gradually adjust the grow lights to avoid overheating your plants.

Look for limp or discoloured leaves. Because the plant can focus on creating buds instead of reviving discoloured leaves, removing discoloured leaves from your cannabis plant will assist develop bigger buds.

During the vegetative stage, cannabis plants quickly recover. Don’t forget to water, feed, and light your plants! You can usually repair minor mistakes and restore your plants’ health.


Flowering should begin when your plants are half the final size. The flower generated during this stage will be turned into smokable buds, making it the most sought-after growing stage among marijuana enthusiasts.

Set your grow lights to a 12/12 light schedule to start blooming. On and off for 12 hours. During the dark period, keep the plants completely dark. The key to this technique is ensuring the grow room is completely dark.

Your plant will grow swiftly after the first several weeks of 12/12 light. The blossoming stretch is a very rapid growth period. With CO2 and bloom nutrients, many cannabis growers experience an extra growth spurt during this period.

After 2-3 weeks of switching to a 12/12 light schedule, your cannabis plants will start producing buds. When your plant’s flower, make sure they’re all females. Male plants develop recognisable pollen sacs at stem junctions. Severe pollen dispersion occurs when male plants are present.


The amount of watering required for indoor cannabis plants varies depending on the size of the containers and light. Water your plants every other day. Daily watering may restrict root airflow.

Can I use any soil?

Your cannabis soil should be very drainable while still retaining water. Consider pH, nutrition, and texture. This is a popular choice and comes in huge bags or bricks. Growers often combine Coco Coir with potting soil to make a super soil.

Invest in a pH testing kit to guarantee your plants are growing properly. The nutrients you add to the soil also affect the pH equilibrium.


The essential nutrients necessary for a high-quality weed plant are nitrogen (N), potassium (K), and phosphorus (P). Micronutrients like calcium, magnesium, sulfur, and others.

So now?

I hope you had an excellent indoor cannabis harvest. Cut the bloom and dry it, and it’s edible! Indoor cannabis growing is simple, and this instruction will always be available.

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