Cannabis is a c3 plant meaning it can absorb co for photosynthesis even during light hours.
Best light schedule for weed plants.
Which light cycle is best for vegetative growth is an often debated topic.
When a grower provides 18 hours of light a day and 6 hours of darkness this is commonly known as the 18 6 light schedule.
This is an example marijuana grow schedule suitable for indoor marijuana growers who use pre fertilized soil but it can also be used by hydro growers.
Cannabis is a photoperiod plant which infers the proportion of light gotten each day picks when the plant starts blossoming or growing buds this article elucidates how much light multi day your photoperiod cannabis plants need to grow and start growing so you get to a happy harvest day.
Cannabis light cycle basics.
While under light cannabis tries to prevent co 2 from leaving its cells by cutting off transpiration.
The more lighting your cannabis plant receives the better their growth and future yield.
Additionally when plants are exposed to 18 straight hours of intense light they become stressed.
Giving your cannabis plants more hours of light each day in the flowering stage will encourage faster growth.
On average growers veg indoor plants for 4 8 weeks under an 18 6 or 24 0 light period.
This allows for robust growth without overspending.
This usually takes 3 4 weeks but can vary by the strain so be sure to consider your strain first.
And since autoflowering plants have short vegetative phases and often grow shorter than photoperiod strains you ll typically want to give your autos at least 18 hours of light.
However this prevents new co 2 from entering the cell blocking new growth.
In the cannabis community light cycles are expressed as a fraction with lights on time over lights off time.
100 of the lights on.
The light for your plants can be manipulated at this stage to yield better growth.
This soil from foxfarm or humbolt is perfect for growing marijuana.
Most indoor growers provide 18 24 hours of light a day known as 18 6 or 24 0 light schedules.
Spray your plants every day with a plant spray to keep the humidity high.
So seedlings should already have a few internodes and clones need to be well rooted.
That is where the cannabis light cycle comes in.
Here we review the basics and explain why we prefer an 18 6 light cycle.
Lights are on 24 hours and off 0 hours.
When the lights are turned off and no photosynthesis is occurring the plant can absorb new co 2 into its cells.
When growing indoors growers will typically put plants on a schedule of 12 hours of light and 12 hours of darkness 12 12 once plants have reached the desired size during the vegetative period.
If you are growing your cannabis indoors from photoperiod seeds the flowering stage starts when you change to a 12 12 light schedule this is when the plants receive light for 12 hours and are in total darkness for 12 hours.
Week 2 vegetative stage 2 weeks of stage.
When marijuana plants are in the vegetative stage keep them under a minimum of 18 hours of growing light also known as 18 6.