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How to Grow Weed Indoors + The Best Indoor Strains: A Beginner’s Guide

Welcome, cannabis aficionados! Today, we’re explaining indoor cannabis cultivation.

This post explains why growing your favorite weed strains indoors is rewarding and beneficial, how to choose the right indoor strain for your grow space, and how to grow your weed indoors.

Read next! How to Grow Weed in Your Basement

Or, if you want an outdoor grow: How to Grow Autoflowering Cannabis Seeds Outdoors.



Cannabinoid handbook

The advantages of indoor cannabis cultivation

Growing weed indoors offers several advantages:

  1. Controlled environment: Indoor cultivation allows for precise control over temperature, humidity, and lighting, which can lead to higher quality and potency in cannabis. So you can avoid ever having dirt weed
  2. Year-round growing: Indoor growing isn’t limited by seasons or weather conditions, allowing for continuous cultivation and harvests throughout the year.
  3. Pest and disease management: Indoor environments can reduce the risk of pests and diseases compared to outdoor growing.
  4. Discretion and security: Growing indoors provides more privacy and security, which is particularly important in areas where cannabis cultivation might attract unwanted attention.
  5. Space efficiency: Even with limited space, indoor growing can be highly productive, especially with techniques like vertical farming and the Screen of Green (SCROG) method.

These benefits make indoor cultivation a popular choice among many cannabis growers, especially first time growers.

How to maximize your indoor grow space

Effectively utilizing your cannabis grow space is key when cultivating indoors. Here’s how to save space:

  • Low-stress training (LST): Gently bend and tie down cannabis branches to encourage horizontal growth, increasing light exposure and promoting even canopy development. LST works well for sativa strains that have a greater height vs. indicas.
  • Screen of green (SCROG): Use a net or screen to spread branches, optimizing light distribution and enhancing bud production.
  • Pruning: Regular pruning helps focus the plant’s energy on the top-producing parts, increasing yield.
  • Vertical farming: Utilize vertical space with tiered setups, especially for shorter autoflowering or indica strains.

Choose a suitable strain for limited space

Choosing the right strain is crucial for indoor cultivation, especially in confined areas. Indica strains are often preferred due to their compact growth and shorter flowering times. However, with the right training techniques, sativa-dominant strains can also thrive indoors.

Consider factors like plant height, flowering time, yield potential, terpene, and cannabinoid (CBD, THC, CBN, etc.) profiles when selecting your cannabis seeds.

The best strains for indoor cultivation

When you’re growing weed inside, there are some strains better suited to the environment. You’re looking for something that can grow relatively quickly, produce a moderate yield, and avoid growing too large.

Some popular strain options for indoor growers are:

Northern Lights: This is a fast grow and flowering cannabis strain. It’s best to grow with the SOG (sea of green) method and a hydroponic or soil-based marijuana strain. Remember to maintain steady airflow throughout the grow area to prevent humidity buildup in the dense canopy of Northern Lights.

Blue Dream: This hybrid strain mix of Haze x Blueberry doesn’t grow too big, doesn’t take too long to grow, doesn’t require too much work, and produces high yields.

Wedding Crasher: Wedding Crasher has a classy lineage: Wedding Cake and Purple Punch. This indica-dominant strain has short, dense buds with hints of purple. Dessert strains are in right now, so finding cannabis seeds and clones of Wedding Crasher shouldn’t be too tough.

OG Kush: While it boasts a moderate flowering time and relatively moderate yield, OG Kush isn’t the easiest strain to grow. If you’re a beginner try one of the alternatives above. If you’re looking for a challenge, and some uplifting, high-quality cannabis plants then give this a try.

growing weed indoors

Step-by-step: How to grow weed indoors

  1. Equipment setup:
    • Grow tent or room: Provides a controlled environment.
    • Lighting: LED or HID lights for different growth stages.
    • Ventilation system: Includes an exhaust fan and carbon filter.
    • Thermometer and hygrometer: To monitor temperature and humidity.
    • Timers: For light cycles.
    • Pots and growing medium: Soil or hydroponic systems.
    • Nutrients: Specific to cannabis growth stages.
  2. Germination: Begin with high-quality, feminized, or autoflowering strain cannabis seeds. Use paper towel methods or seedling plugs for effective germination. Soak your seeds for 24-48 hours until they sprout.
  3. Vegetative Stage: Provide 18-24 hours of light using LED or HID grow lights, maintain optimal temperature (70-85°F), and ensure adequate nitrogen-rich nutrients. Humidity should be around 40-60% and light will need to run around 18-24 hours per day. Keep the soil wet, but not waterlogged.
  4. Flowering Stage: Switch to a 12/12 light cycle(12 hours of light and 12 hours of darkness) to induce flowering. Adjust nutrients to higher phosphorus and potassium levels. Reduce humidity to 40-50%.
  5. Harvesting: Identify the right time to harvest by examining trichome color, usually when they turn from clear to milky or amber.
  6. Drying and Curing:
    • Dry buds in a dark, ventilated room for 7-10 days.
    • Cure in airtight containers, opening them daily for the first week.

Odor management for indoor cultivation

To maintain discretion and control odors use the following:

  • Carbon filters: These are highly effective at neutralizing airborne odors.
  • Sealed environment: Ensure your grow room or tent is well-sealed to avoid letting any scent escape.
  • Proper ventilation: Establish an efficient exhaust system to manage smells and keep air moving.

Final thoughts

Indoor cannabis cultivation is an art and science that requires patience, attention to detail, and a passion for the plant. By carefully selecting the right strains, optimizing your grow space, and following these detailed steps, you can achieve bountiful harvests of high-quality cannabis right in your home.

Learn how to grow your own weed!

THC University’s Grow Basics Certification is the only training you’ll ever need to grow weed. 

The interactive course has more pictures, videos, and audio than any other online cannabis course

It’s designed to give indoor growers enough information to cultivate great crops, but not so much information that they are overwhelmed by horticultural concepts. 

Taking this course is like going on a tour of the 150 different grow rooms that Jorge visited to collect information and photos for this class.

Enroll now!