Growing cannabis takes four things: a viable seed or clone, a well-drained medium, 18 to 24 hours of light per day for vegetative growth, and a switch to 12 hours of uninterrupted darkness per day to start flowering. Most photoperiod plants finish flowering in 8 to 12 weeks, then need 7 to 14 days of drying and 2 to 4 weeks of curing. Beginners see the best results indoors in a tent with an exhaust fan, a light timer, and a pH pen.
Buy Cannabis Seeds for Beginners: A Comprehensive Guide
What do you need to start growing cannabis?
- A seed or rooted clone
- A container with drainage holes, 3 to 7 gallons for soil
- A grow light, or an outdoor spot with 6 or more hours of direct sun
- A timer, an exhaust fan, and a small oscillating fan
- pH and PPM meters, plus a base nutrient line
Indoor growers also need a light-proof space. Any light leak during the dark period can stall flowering or stress plants into producing male flowers.
Soil vs Hydroponics for Cannabis: A Comprehensive Comparison
How do you germinate cannabis seeds?
Place seeds between two damp paper towels, keep them near 70 to 80 F, and check daily. Taproots usually appear in 24 to 72 hours, and seedlings go into medium with the taproot pointing down and the seed head just below the surface. Keep the medium moist but never soaked, since waterlogged seeds rot before they sprout.
cannabis growing guide for beginners
Clones skip this step. Root them in a cube or plug under 18 hours of light and transplant once roots show through the sides.
What growing medium and container should you use?
A peat or coco based mix with perlite drains well and buffers beginner mistakes. Cannabis dislikes compacted, heavy soil, so aim for a loose mix that holds moisture without staying wet. Soil pH should sit near 6.0 to 7.0, while coco and hydro run closer to 5.5 to 6.5.
How much light does cannabis need?
Vegetative plants want 18 hours of light and 6 hours of dark, though 24 hours works for some growers. Modern LED bars at 300 to 500 watts cover a 3x3 foot canopy and produce less heat than older lamps. Keep seedlings 24 to 36 inches from the light and lower the fixture as plants harden off.
How do you water and feed cannabis plants?
Water when the top inch of medium feels dry, which is often every 2 to 3 days in a fabric pot and slower in cool rooms. Feed at half the label strength for the first two weeks, then raise it as plants speed up. A flush of plain water every few weeks clears salt buildup at the roots.
What temperature and humidity do cannabis plants like?
Keep daytime air near 70 to 80 F and nighttime about 10 degrees cooler. Seedlings and clones like 65 to 70 percent relative humidity, veg sits near 55 to 65 percent, and flowering drops to 40 to 50 percent to protect against bud rot.
How do you trigger flowering?
Photoperiod plants flower when the dark period reaches 12 uninterrupted hours, so most growers flip the timer and keep the room light tight. Autoflowering plants ignore the schedule and start flowering on their own after 3 to 5 weeks. Stretch happens in the first two to three weeks of flower, and buds fill out in the final month.
When and how do you harvest, dry, and cure cannabis?
Harvest when trichomes on the buds read mostly cloudy with some amber, usually 8 to 12 weeks after the light flip. Cut branches, trim fan leaves, and hang them in a dark room at 60 F and 60 percent humidity for 7 to 14 days. Then jar the buds and burp the jars daily for 2 to 4 weeks to finish the cure.
Is it legal to grow cannabis at home?
Home cultivation rules vary by state, and some places allow medical patients to grow while adult-use home grows stay illegal. Check your local law and plant limits before you start.