Whether you're just starting out with marijuana growing or looking to improve your existing crop, following this complete guide will help you produce big, high-quality yields right at home. With the right equipment, techniques, and attention, cultivating pot indoors can be an extremely productive and cost-effective endeavor.
Choosing Weed Strains
The first step in planning your indoor grow is choosing the right marijuana varieties to grow. The three main types of pot plants each have their own qualities.
Sativas
Known for their energizing cerebral effects, these strains spread tall and slender with narrow leaves. They thrive in warmer tropical climates and have a longer blooming time between 10-12 weeks indoors. Top sativa varieties include Jack Herer, Durban Poison, Super Lemon Haze, and Jack Herer.
Indicas
Indicas provide calming body-focused effects and grow short and bushy with broad leaves. Adapted to cooler mountain climates, they flower faster within 8-9 weeks. Popular relaxing strains include Granddaddy Purple, Northern Lights, and Bubba Kush.
Mixed strains
Mixed strains blend traits from both energizing strains and indicas. They offer combined effects and have medium flowering periods around 2.25-2.5 months. Well-known hybrids are Blue Dream, OG Kush, and Blue Dream.
Setting Up Your Grow Space
Pot plants need the right controlled environment to thrive. Key factors for indoor cultivations are lighting, airflow, layout, and finding the ideal discreet location.
Location
Choose an available space with easy access to irrigation and electrical outlets. An empty extra bedroom, unused closet, basement corner, or cultivation tent locked away in a garage all make great discreet grow room spots.
Lights
Cannabis requires strong light for all vegetative stages. LED grow lights are efficient and come in broad spectrum options mimicking real sunlight. Cover 250-400 watts per square foot for the growth stage and 400-600 watts per square foot for bloom.
Ventilation
Proper airflow and exhaust systems keep ideal temperature, moisture, and pure CO2 levels. Install silent 4-6 inch fans or scrubbers to refresh stale air and reduce odors.
Layout
Optimize your space by arranging plants strategically under the lamps and leaving room to reach and work around them. Set up distinct zones for vegetation, bloom, curing, and cloning.
Cultivation Mediums
Weed can be cultivated in various substrates, each with pros and cons. Pick a appropriate option for your particular setup and growing style.
Soil
The classic substrate, soil is inexpensive and simple for beginners. It provides great flavor but requires more watering and fertilizing to nourish plants. Enrich soil with vermiculite or coir to enhance aeration.
Coconut coir
Made from coir, renewable coconut fiber holds water but still lets in air to the roots. It's cleaner and more predictable than soil. Use coco-specific nutrients to prevent accumulation.
Hydroponics
In water systems, plant roots develop right in fertilizer irrigation solution. This enables quick development but needs careful observation of solution properties. DWC and irrigation systems are popular methods.
Sprouting Seeds
Sprouting prepares your pot seeds to start growing radicles. This prepares them for planting into their growing medium.
Towel Method
Put seeds between wet paper towel and maintain them damp. Inspect after a week for growing radicles indicating germination is complete.
Planting directly
Insert seeds right into wetted cultivation medium 6mm deep. Gently water and wait 1-2 weeks until sprouts push through the surface.
Rockwool Cubes
Soak rockwool cubes in balanced water. Insert seeds 1⁄4 inch deep into the cubes. Keep cubes wet until sprouts appear within a week to 2 weeks.
Repotting Seedlings
Once sprouted, cannabis seedlings need to be transplanted to avoid overcrowding. Move them into appropriately sized containers.
Preparing Containers
Fill final containers with cultivation medium enriched with time-released nutrients. Allow containers to absorb water for 8-12 hours before repotting.
Gently repotting
Carefully loosen young roots from sprouting medium using a spade. Place into prepared container at same depth as before and lightly water in.
Vegetative Stage
The vegetative stage promotes foliage and plant form through 3/4 to full day of continual light exposure. This stage usually lasts 4-8 weeks.
Providing 3/4 to full day of Lighting
Use lamps on a 24 daily schedule or natural sunlight to trigger nonstop photosynthesis. Light intensity influences size and internodal spacing.
Fertilizing
Use grow stage fertilizers richer in nitrogen. Make sure pH stays around 6.5 for full fertilizer uptake. Fertilize 1⁄4 to 1⁄2 strength after 2 weeks and strengthen slowly.
LST and topping
Fimming, LST, and trellising manipulate growth shapes for flat foliage. This boosts yields.
Flowering Stage
The blooming stage grows buds as plants show their sex under a 12 hour cycle schedule. It lasts 2-3 months depending on variety.
Switching to 12/12
Switch lamps to 12 hours on, 12 hours off or place outside for outdoor 12/12 timing. This signals plants to begin flowering.
Stop Fertilizing
Leaching removes nutrient salts to enhance taste. Feed lightly the first period then just use plain water the last 2 weeks.
Flushing
Continue 12/12 light timing but leach using pH-balanced water only. Return to plain watering if buds aren't yet mature after two weeks.
Reaping
Knowing when pot is completely mature delivers maximum potency and aroma. Harvest plants at optimal maturity.
Identifying Ripeness
Look for fading pistils, swelling calyxes, and 10-15% cloudy trichs. Check buds around the plant as they don't all mature evenly.
Cutting Plants
Use sterilized, razor-sharp trimming scissors to gently cut each plant at the base. Keep several inches of stalk attached.
Drying
Suspend whole plants or colas upside down in a lightless room with average temp and RH around 50-60% for 1-2 weeks.
Curing
Aging continues desiccating while aging the buds like aged spirits. This process mellows harshness and intensifies cannabinoid contents.
Jars and Humidity
Manicure dried buds from branches and place into sealed containers, packing about 75% capacity. Use a sensor to measure container humidity.
Burping Daily
Unseal jars for a few hours each day to slowly lower humidity. Rehydrate buds if RH drops below 55%.
Long term storage
After 14-21 days when humidity levels off around 55-65%, do a last trim and keep forever in sealed jars.
Common Problems and Solutions
Even seasoned cultivators run into various marijuana plant problems. Identify issues early and fix them properly Request More Info to maintain a strong garden.
Poor feeding
Yellowing leaves often signify inadequate nitrogen. Purpling stems and leaves signal low phosphorus. Test pH and increase fertilizers gradually.
Pests
Thrips, aphids, fungus gnats, thrips, and root aphids are frequent pot pests. Use neem oil sprays, ladybugs, and yellow traps for organic control.
Powdery mildew
Excessive humidity encourages botrytis and root rot. Increase airflow and circulation while reducing RH under 50% during flowering.
Conclusion
With this complete indoor weed cultivation guide, you now have the knowledge to grow plentiful potent buds for personal harvests. Follow these techniques and methods during the germination, growth, and bloom stages. Invest in good gear and closely check on your plants. In time, you'll be compensated with sticky fragrant buds you raised yourself under the patient guidance of your green hands. Good luck cultivating!