by Stoney Tark
When it comes to cultivating sativas, there are quite a few factors that you should consider before germination. These sativa-growing tips will make life easier and ensure the 15+ weeks spent are worth every second!
#1: Prepare for the Stretch
One thing that sativa plants are well known for is how tall they can grow. Unlike indica plants, sativas will produce the longest internodal spacing and growth structure, meaning when they stretch once flowering is induced, they can increase in size by 200–300%. My tip here is to anticipate the stretch and calculate enough space between the top of the canopy and your grow lights.
#2: Nutrient Sensitivity
Sativa plants, from my experience, are more sensitive to nutrients compared to indica or indica-dominant hybrids. This means you can lower EC levels and gradually increase nutrient strength. Given sativas’ long flowering time, finding the right balance early on will be key to optimal plant health and yield.
#3: 11/13 Flowering Time
One trick I picked up over the years, working with sativa genetics, is that you can flower sativa plants with 11 hours of light and 13 hours of dark. This slight change in lighting hours will save you an hour a day on your electric bill and also speed up the flowering and ripening stages. I know growers who give their sativa plants 10 hours of light and 14 hours of dark for the final three weeks.
#4: Utilize Plant Training
Training techniques, such as LST and topping, are excellent ways to reduce plant height. I recommend topping sativa plants a week before flowering, combined with tying down using thick gardening wire. Doing so will allow you to produce a 1.5-meter (~5-foot) plant that is much easier to maintain.
#5: Add Support Early On
Sativa cannabis plants have a tendency to produce long, finicky, and wiry side branches. Once they fill out during the flowering stage, they need support to keep the structure upright and the foliage closest to the light source. I recommend adding 10–20 mm (about 0.5–1 inch) wide bamboo canes around the edges of the pot. Secure the canes and side branches together using thick gardening wire. Adding support early will prevent side branches from toppling.
#6: Use Small Pots
When growing a sativa, I prefer to use smaller pots to help produce a mature plant 1.5 meters (about 5 feet) tall. Sativa cannabis plants love to produce a huge root mass, so working with a 2.5–5 gallon fabric pot combined with training can be a great way to produce a massive yield without worrying about your plant becoming too tall and overstretched.
#7: Short Vegetation Time
For the indoor grower who wants to take on the challenge of a high-maintenance sativa cannabis plant, the best tip I can give you is to keep the vegetation time short. Anywhere between 2 and 3 weeks is ideal if you do not want excessively tall, overwhelming plants. Outdoors, sativa cannabis plants can grow as tall as 3 meters (~10 feet) due to their long vegetative period.
#8: Be Patient!
The flowering time of an old school full-blooded sativa can take anywhere from 77–91 days! This means that once you germinate those seeds, you’d better be in for the long haul and have plenty of patience. You can find fast-flowering sativas ready to chop in 70 days; if you really want something special, the 84-day flowering time is recommended. Sativa autoflowers are a great alternative for growers who need a faster turnaround time.
Take your indoor garden further
If you want structured guidance beyond trial and error, Oaksterdam’s Home Grow course walks you through setting up and running a productive indoor garden from seed to harvest. When you’re ready to turn that experience into job-ready skills, the Live Commercial Horticulture Worker program adds live instruction, hands-on learning, and the practical training you need to step into a professional grow with confidence.
Use code “tark10” at checkout to save 10% on your enrollment in either course.