Growing 12-12 is as simple as changing the timing on your light cycles, giving your plants equal amounts of day and night right from when they sprout. The plants will look different to a cannabis plant that goes through vegetative growth. Photosensitive hormones in cannabis make the highest point the largest cola. This method all but guarantees only main bud growth on every small plant. Essentially you will be growing a cola with a few short, budded side branches – with the plant basically being a bud in itself. Be sure to stake your plants.
Do you want to go from seed to bud quicker and cheaper? A faster, space saving and economical way to grow is the no veg, seed to flower, 12-12 light cycle method.
The 12-12 lighting technique makes the grow cycle 7-9 weeks in general, rather than the much longer time needed when giving plants a vegetative phase. For the space constrained, and those willing to experiment and give it ago, it can be a dream come true.
Force flowering marijuana from seed can provide excellent quality, resinous flowers, all the while saving space, time, and money. For those with space constraints, it is a win-win!
For example, in California, we have the following light schedules throughout the year:
Different light cycles with autoflowering cannabis are also used to save electricity, by giving your plant a little bit less of light (like a 16/8) it will sum up to an important amount at the end of each cycle. Even though it can affect the yield, removing only 2hs of light per day shouldn’t make a big difference on the plant and can save you a couple of bucks.
And, as fall approaches the sun is closer and as a result, your plants will get more of the red spectrum which promotes stretching and bud production; this means that by keeping track of the spectrum throughout the seasons you can plan your grow cycle to get the best plant growth possible, using the different spectrum to control how your plants grow.
This means that when growing outdoor you have to know the amount of light and darkness you will receive in the next couple of months so your plant develops the way you want to.
The cannabis vegetative light cycle is super important. In this stage, cannabis is building up strength to be able to support all the buds in the flowering stage. There’s nothing as the best light cycle for the vegetative stage, the light cycle will depend on a lot of factors that are individual to each grow room. It is crucial that you give them the amount of light and nutrients they need so they can develop properly and be ready for the next stage. Even though it mostly depends on genetics, the amount of light your plant will be able to receive is a decisive factor in the amount and quality of flowers it will produce.
For growers starting with cannabis clones, generally you should wait a few weeks longer than with seeds. Cannabis clones are more prone to flowering early outdoors than seeds, so you might want to put your clones out in late Spring or early Summer. (What are clones?)
Here's an example of LST to keep a plant short:
So indoor growers have a choice to flower their plants whenever they want… When is the best t ime to start flowering your cannabis indoors?
Indoors most growers put their plants on a 12-12 schedule to initiate flowering. Outdoors the plant will naturally start budding in late summer when nights are growing longer and longer as winter approaches. Just make sure plants aren't exposed to light during their dark period!
Flowering – Flowering (Budding) Stage leads to Harvest –
Give 12 hours light & 12 hours dark each day
It's important to make sure plants aren't exposed to light at night during their dark period, even street lights or spotlights, as this can prevent cannabis plants from flowering properly.
The plant can receive as much as 24 hours of light a day while in the vegetative stage. Many indoor growers provide 18-24 hours of light a day (known as 18-6 or 24-0 light schedules) during the vegetative stage to encourage faster vegetative growth.