Whether you're beginning pot 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 marijuana indoors can be an extremely satisfying and cost-effective endeavor.
Choosing Weed Strains
The first step in planning your indoor harvest is choosing the right marijuana strains to cultivate. The three main types of pot plants each have their own qualities.
Sativas
Known for their energizing cerebral effects, sativas grow tall and slender with narrow leaves. They flourish in hotter equatorial climates and have a longer flowering time between 2.5-3 months indoors. Top sativa strains include Jack Herer, Durban Poison, Super Lemon Haze, and Jack Herer.
Relaxing strains
Indicas provide relaxing body-focused effects and grow short and bushy with broad leaves. Accustomed to cooler mountain climates, they flower faster within 2-2.25 months. Popular indica strains include Northern Lights, Bubba Kush, and Bubba Kush.
Mixed strains
Mixed strains mix traits from both sativas and indicas. They offer blended effects and have moderate blooming times 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 succeed. Key factors for indoor grows are lights, ventilation, layout, and finding the ideal discreet spot.
Location
Choose an unused space with direct access to water and power outlets. An empty spare room, large closet, corner of the basement, or grow tent tucked 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 full spectrum options simulating real sunlight. Cover 250-400 watts per square foot for the vegetative stage and 20-40 watts per sq. ft. for bloom.
Ventilation
Proper airflow and exhaust systems keep ideal temperature, humidity, and pure CO2 levels. Install silent 10-15 cm blowers or carbon filters to circulate old air and eliminate smells.
Layout
Optimize your space by arranging plants strategically under the lamps and allowing room to access and work around them. Set up distinct zones for vegetation, flowering, curing, and propagation.
Cultivation Substrates
Pot can be cultivated in different mediums, each with pros and cons. Pick a suitable option for your specific setup and growing style.
Soil
The classic substrate, soil is inexpensive and simple for new growers. It provides excellent taste but needs more watering and fertilizing to nourish plants. Amend 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 more sterile and more consistent than soil. Use coir-specific nutrients to avoid calcium buildup.
Hydroponics
In hydro systems, plant roots grow directly in nutrient water solution. This allows rapid growth but needs close observation of water chemistry. Deep water culture and drip systems are common techniques.
Germinating Seeds
Germination activates your weed seeds to begin sprouting taproots. This prepares them for planting into their cultivation medium.
Towel Method
Put seeds between wet paper towel and maintain them damp. Check after 2-7 days for emerging taproots indicating cannabis grow guide germination is complete.
Direct Planting
Plant seeds directly into pre-moistened cultivation medium 6mm deep. Gently water and wait 7-14 days until seedlings break through the surface.
Rockwool Cubes
Presoak rockwool cubes in pH-adjusted water. Place seeds 6mm deep into the cubes. Keep cubes wet until seedlings emerge within 1-14 days.
Repotting Young plants
Once germinated, marijuana seedlings need to be transplanted to avoid overcrowding. Move them into appropriately sized pots.
Ready Containers
Load final pots with growing medium amended with slow-release fertilizer. Let pots to absorb water overnight before repotting.
Gently repotting
Carefully separate seedling roots from sprouting medium using a spade. Put into prepared container at equal depth as before and gently water in.
Growth Stage
The vegetative stage encourages leafy growth and plant structure through 18-24 hours of daily lighting intensity. This stage usually lasts 4-8 weeks.
Providing 3/4 to full day of Lighting
Use grow lights on a 24 hour schedule or outdoor light to trigger constant growth. Lamp intensity influences size and node distance.
Nutrients
Use vegetative stage fertilizers higher in nitrogen. Make sure pH remains around 5.8-6.3 for proper fertilizer uptake. Feed 1⁄4 to 1⁄2 concentration after 14 days and increase slowly.
LST and topping
Topping, LST, and trellising manipulate growth shapes for even foliage. This boosts yields.
Bloom Stage
The blooming stage develops buds as plants reveal their sex under a 12/12 cycle schedule. It lasts 8-12 weeks based on strain.
Switching to 12/12
Switch lamps to 12 hours on, 12 hours off or place outside for natural 12 hour cycle. This signals plants to begin flowering.
Flushing
Flushing removes fertilizer residuals to improve flavor. Fertilize lightly the first weeks then just use pH'd water the last 2 weeks.
Flushing
Continue 12 hour photoperiod but flush using neutral pH water only. Return to plain watering if buds aren't yet mature after two weeks.
Reaping
Knowing when marijuana is fully ripe delivers peak cannabinoid content and aroma. Cut down plants at optimal maturity.
Signs of readiness
Look for swollen calyxes, faded pistils, and 5-15% amber trichomes. Inspect buds across the plant as they don't all mature evenly.
Cutting Plants
Use clean, sharp trimming scissors to carefully cut each plant at the base. Keep several inches of stem attached.
Curing
Suspend whole plants or colas upside down in a dark room with moderate temperature and RH around 50-60% for 7-14 days.
Aging
Aging continues desiccating while improving the buds like fine wine. This process mellows bitterness and further develops terpene contents.
Jars and Humidity
Trim cured buds from branches and store into glass jars, filling about 75% capacity. Use a sensor to measure jar moisture.
Opening jars daily
Open jars for a few hours each day to gradually lower humidity. Remoisten buds if RH drops below 55%.
Final Cure
After 14-21 days when moisture levels off around 55-65%, perform a final manicure and keep forever in airtight jars.
Common Problems and Solutions
Even experienced cultivators run into different cannabis plant problems. Identify issues early and fix them correctly to keep a healthy garden.
Nutrient Deficiencies
Chlorosis often signify inadequate nitrogen. Purpling stems and leaves show phosphorus deficiency. Check pH and boost fertilizers slowly.
Bugs
Spider mites, fungus gnats, mites, and nematodes are frequent cannabis pests. Use neem oil sprays, ladybugs, and yellow traps for organic control.
Powdery mildew
Excessive moisture encourages powdery mildew and bud rot. Increase circulation and venting while reducing humidity below 50% during flowering.
Summary
With this complete indoor pot growing guide, you now have the info to cultivate plentiful potent buds for personal harvests. Apply these techniques and methods during the seed starting, vegetative, and flowering stages. Spend in good equipment and closely check on your plants. In time, you'll be compensated with sticky aromatic buds you grew yourself under the loving care of your green hands. Good luck cultivating!