Whether you're new to weed cultivation or looking to improve your existing grow, following this complete guide will help you produce large, high-quality yields right at home. With the right supplies, strategies, and attention, growing cannabis indoors can be an extremely rewarding and cost-effective endeavor.
Choosing Pot Varieties
The first step in planning your indoor crop is selecting the right cannabis cultivars to produce. The three main types of marijuana plants each have their own traits.
Sativas
Known for their energizing mental effects, these strains grow tall and slender with narrow leaves. They thrive in tropical tropical climates and have a longer flowering time between 10-12 weeks indoors. Top energizing strains include Sour Diesel, Durban Poison, and Jack Herer.
Indicas
Indicas provide calming body-focused effects and grow short and bushy with wide leaves. Accustomed to cooler mountain climates, they bloom faster within 2-2.25 months. Popular indica varieties include Northern Lights, Bubba Kush, and Bubba Kush.
Hybrids
Mixed varieties blend traits from both energizing strains and relaxing strains. They offer combined effects and have medium flowering periods around 9-10 weeks. Popular hybrids are OG Kush, Girl Scout Cookies, and Blue Dream.
Setting Up Your Cultivation Space
Cannabis plants need the right controlled environment to thrive. Key factors for indoor grows are lights, airflow, layout, and finding the ideal discreet spot.
Location
Choose an available space with quick 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 hidden cultivation room spots.
Lighting
Cannabis requires strong light for all vegetative stages. LED grow lights are efficient and come in broad spectrum options simulating real sunlight. Cover 250-400 watts per square foot for the vegetative stage and 400-600 watts per square foot for bloom.
Airflow
Proper airflow and exhaust systems keep ideal temp, humidity, and fresh CO2 levels. Set up quiet 4-6 inch fans or carbon filters to circulate old air and eliminate odors.
Layout
Optimize your space by positioning plants strategically under the lamps and allowing room to access and work around them. Set up separate zones for growth, bloom, drying, and cloning.
Growing Mediums
Weed can be grown in various substrates, each with pros and cons. Pick a suitable option for your specific setup and growing style.
Soil
The classic substrate, soil is cheap and simple for new growers. It provides excellent taste but needs more irrigation and fertilizing to nourish plants. Amend soil with perlite or coco to improve drainage.
Coconut coir
Made from coir, renewable coconut fiber holds water but still lets in air to the roots. It's more sterile and more predictable than soil. Use coco-specific nutrients to prevent accumulation.
Water systems
In water systems, plant roots develop right in fertilizer irrigation solution. This allows quick growth but needs close monitoring of water chemistry. Deep water culture and drip systems are common techniques.
Germinating Seeds
Germination activates your weed seeds to begin growing radicles. This readies them for transplanting into their growing medium.
Paper Towel Method
Place seeds between damp paper towels and keep them moist. Inspect after a week for growing radicles showing sprouting is complete.
Direct Planting
Plant seeds directly into pre-moistened growing medium 1⁄4 inch deep. Gently water and wait 7-14 days until seedlings break through the top.
Cubic rockwool
Soak cubic rockwool starters in pH-adjusted water. Place seeds 6mm deep into the cubes. Keep cubes wet until seedlings emerge within 1-14 days.
Transplanting Young plants
Once germinated, marijuana seedlings need to be transplanted to avoid overcrowding. Move them into proper sized pots.
Ready Containers
Fill final containers with cultivation medium enriched with slow-release nutrients. Allow pots to absorb water for 8-12 hours before repotting.
Gently repotting
Gently separate young roots from sprouting medium using a spoon. Place into pre-soaked pot at equal depth as before and lightly water in.
Vegetative Stage
The growth stage encourages leafy growth and plant structure through 3/4 to full day of continual light exposure. This stage usually lasts 4-8 weeks.
Using 3/4 to full day of Light
Use lamps on a 24 daily cycle or outdoor light to trigger constant growth. Lamp intensity influences size and node distance.
Fertilizing
Use vegetative stage fertilizers richer in nitrogen. Make sure pH remains around 5.8-6.3 for proper nutrient uptake. Fertilize 1⁄4 to 1⁄2 concentration after 14 days and increase slowly.
LST and topping
Topping, low stress training, and trellising manipulate growth patterns for flat canopies. This increases yields.
Flowering Stage
The flowering stage develops buds as plants reveal their sex under a 12/12 cycle schedule. It lasts 2-3 months depending on variety.
Changing Light Schedule
Change grow lights to 12/12 or move outside for outdoor 12/12 timing. This triggers plants to start blooming.
Stop Fertilizing
Leaching removes fertilizer residuals to improve flavor. Fertilize lightly the first weeks then just use pH'd water the final 2 weeks.
Flushing
Maintain 12 hour photoperiod but flush using neutral pH water only. Resume clean watering if buds aren't yet mature after two weeks.
Reaping
Knowing when marijuana is completely mature ensures peak cannabinoid content and aroma. Harvest plants at optimal maturity.
Signs of readiness
Check swollen calyxes, faded pistils, and 5-15% amber trichomes. Check buds around the plant as they don't all Send a Message ripen evenly.
Harvesting plants
Use clean, sharp trimming scissors to carefully slice each plant at the base. Keep several inches of stem attached.
Curing
Hang whole plants or colas inverted in a dark room with moderate temp and humidity around 50-60% for 1-2 weeks.
Curing
Curing keeps desiccating while aging the buds like fine wine. This technique mellows harshness and further develops terpene and terpene profiles.
Jars and Humidity
Manicure cured buds from stems and place into sealed containers, packing about 3⁄4 full. Use a sensor to monitor jar humidity.
Opening jars daily
Unseal jars for a few hours each day to gradually lower humidity. Rehydrate buds if RH goes under 55%.
Final Cure
After 2-3 weeks when moisture levels off around 55-65%, perform a final manicure and keep forever in sealed jars.
Common Problems and Solutions
Even seasoned cultivators run into different cannabis plant problems. Identify issues soon and fix them correctly to maintain a vibrant garden.
Poor feeding
Yellowing leaves often indicate insufficient nitrogen. Purpling stems and leaves signal low phosphorus. Test pH and increase nutrients gradually.
Pests
Thrips, aphids, fungus gnats, mites, and nematodes are frequent cannabis pests. Use neem oil sprays, ladybugs, and sticky traps for natural control.
Powdery mildew
Excessive moisture promotes botrytis and bud rot. Improve airflow and circulation while lowering humidity below 50% during flowering.
Summary
With this complete indoor marijuana growing guide, you now have the info to cultivate bountiful potent buds for personal harvests. Apply these techniques and methods during the seed starting, vegetative, and flowering stages. Spend in good gear and carefully monitor your plants. In time, you'll be rewarded with sticky fragrant buds you raised yourself under the loving care of your green thumbs. Happy growing