When to start light cycle on weed plants
Light Cycles for Growing Cannabis, Fully Explained
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light cycles for growing cannabis by
Percy's grow room a cannabis plants will
grow differently according to how much
light it gets daytime compared to how
much darkness it gets nighttime there
are many different light cycles for
growing cannabis indoors each have their
own pros and cons in this video we will
discuss different light cycles for
growing cannabis when to use them and
why this will help you understand how to
grow cannabis and it's or more what are
light cycles light cycles are the amount
of light versus the amount of darkness a
plant receives a cannabis plant will
start to grow in the spring flower
throughout summer and be harvested in
the autumn throughout the year it will
receive a different amount of light
depending on what season it is when you
use light cycles indoors you're trying
to imitate the length of day for
springtime or summertime this will keep
a plant in veg simulating springtime
growth or in flower simulating summer
growth to understand light cycles for
growing cannabis you should understand
how a plant grows in its natural habitat
outdoors cannabis light cycles outdoors
as the year goes from spring into summer
and then to autumn the days get longer
and then shorter unless you're growing
near the equator plants can detect the
changes in the amount of light they
receive and this tells them what season
they are in spring equinox sometime
around March 20th in the Northern
Hemisphere or September 23rd in the
southern hemisphere the days begin to
get longer and we head into spring this
is when a cannabis seed will germinate
and begin its lifecycle outdoors as the
days get longer the plant will grow more
and more and continue into its
vegetative stage until the days start to
become shorter this happens shortly
after the summer solstice summer
solstice the summer solstice is when the
days reach their longest
up until now the plant has grown in its
vegetative state
this is midsummer and the plants will
soon prepare themselves for flowering it
would depend on what strain you're
growing but the flowers will start to
grow when the plants get around 14 hours
of daylight and 10 hours of darkness
when the flowering stage begins it will
continue for around 8 to 14 weeks until
it is harvested in late autumn autumn
equinox autumn equinoxes September the
days are 12 hours long and the night is
also 12 hours long this is when a
cannabis plants will be in the flowering
stage by now the plant should already be
showing small flowers when a plant
starts to grow its flowers each strain
dependent and so is harvest time sativa
dominant strains will flower for longer
than indica dominant strains and may
need to be harvested later a cannabis
plant will flower for anything from 8 to
16 weeks but when growing outdoors you
must harvest the pram before frost sets
in and the colder weather of winter
starts winter solstice at this point
your plant should already have been
harvested this is the height of winter
when the nights are longer than the days
in its natural habitat a cannabis plant
cannot survive these conditions and
would have died already any seeds made
by the female plants will be laying
under the surface of the ground waiting
for conditions to improve when
springtime comes again and the climate
starts to get warmer the seeds will
germinate around the spring equinox and
the whole cycle begins again this is how
a cannabis plant uses light cycles
naturally in the wild when you grow
cannabis indoors you have to simulate
the length of day and night to induce
certain stages of the cannabis plants
life cycle growing around the equator
the days and nights around the equator
are always around the same length 12
hours day and twelve hours night a
cannabis plant can grow fine under 12 12
but it will not stay in its vegetative
state for long about four weeks after
germination a cannabis plant will reach
maturity and it will be ready to grow
flowers before this the
is not ready to grow buds and even if it
is on 1212
it will only veg you can grow cannabis
using twelve hours of light and 12 hours
of darkness from seed just like a plant
grown at the equator but this will not
speed the grow up you still have to wait
about four or five weeks after
germination before the flowering cycle
begins light cycles for growing indoors
the idea of using light cycles to grow
cannabis indoors is pretty much trying
to simulate the Sun at certain times of
the year this is not only done with the
length of day and night but also what
color light the plants get
in springtime the light will be slightly
more into the blue spectrum and during
summer it will be a lot more red
different bulbs can be used at different
stages of growth to imitate this you
have more control over lighting when
growing cannabis indoors and can control
the length of day and night by using a
timer timers for cannabis grow lights
grow lights are heavy-duty and they use
a lot of power because of this you need
to be sure you use the correct timer for
your lighting rig you have to be safe
with your equipment if you use a timer
that isn't designed for a heavy load it
may short-circuit at the very least the
timer could break and the light cycle
your plants are used to will be suddenly
changed and this will cause them stress
if your plant is in flower and there is
an irregular light cycle it can cause it
to hermie you must use reliable safe
equipment you can't put a price on peace
of mind 24 zero lights on all day a
cannabis plant can be grown under 24
hours of light with no dark period this
light cycle tends to be used on
seedlings or cuttings in the early
stages of growth some growers will grow
autoflowering cannabis plants under 24
hours of light but of course when
growing indoors more hours of light
means more energy bills it is not clear
whether the extra energy turns into
extra yield 24 lights on for 20 hours a
light cycle of twenty hours lights and
four hours darkness tends to be used for
seedlings and cuttings or auto flowering
plants this is preferred over 24 hours
of light as it gives the plant some time
to rest and it reduces the energy bills
a little when you are growing indoors
you are trying to imitate a natural
environment all plants will receive some
hours of darkness so 24 is usually the
most amount of light a grower will give
to a plant 18 6 lights on for 18 hours
18 6 is the most common light cycle for
growing cannabis it is used to vegetate
photo period cannabis plants or grow
autoflowering cannabis plants for their
life cycle by keeping a photo period
cannabis plants under 18 hours of light
and six hours of darkness it will stay
in the vegetative stage a plan can be
kept in this state for years and this is
how mother plants are kept a cannabis
plant will not start to flower until it
receives at least ten hours of darkness
and 14 hours of light but this is strain
dependent 14 10 lights on for 14 hours
some strains of cannabis may begin to
flower with 14 hours of light and 10
hours of darkness this is risky though
if the cannabis plant gets confused
about its light cycle during the
flowering period it can Reeve edge or
hermie
so when Scheuer a plant goes into flower
and has no side effects most cannabis
plants will be flowered under 12:12
12/12
an equal amount of light and dark 12:12
is the light cycle used to induce
flowering in a cannabis plant when the
days and nights are the same length of
time a cannabis plant will release a
hormone that triggers the flowering
process this hormone takes a few days to
a week to build up and then you will see
flowers starting to form the night cycle
must be undisturbed with no light
interrupting it at all make sure that
any equipment with lights on or any
light leaks coming into the grow room
are sealed
disturbing the night cycle can force the
plant to revenge or hermaphrodite and
grow seeds the most popular light cycles
for growing cannabis are 1864 veg and 12
trial for flower just sticking with
these two light cycles will be fine
photo period cannabis plants photo
period cannabis plants are plants that
react to light cycles for example plants
that were vegetate under 18 6 but not
flower until they are under 12 12 a
photo period cannabis plants will not
reach maturity until it is around four
to five weeks from seed even if a plant
is grown under 12 12 from seed flowers
will not start to show until it is
mature it is always best to veg a photo
period cannabis plants under 18 6
for at least four weeks before flipping
to flower you can veg a photo period
cannabis plants for as long as you need
to by growing one plant and extending
the veg period by a couple of weeks you
can achieve the same yield as 10 small
plants night cycle during flower when
growing photo period cannabis plants it
is vital that the hours of darkness are
undisturbed even a small LED light on a
piece of equipment is enough to stop
your plant from flowering if you have
light leaks you risk three things one
your plants were not flower when you
want them to to your plants may revert
back to the vegetative stage 3 your
plants will hermaphrodites and produce
seeds before you change your light cycle
to 1212 you should make sure your tent
or grow room is fully light proof and
free from any lights on the equipment
you can do this by getting into your
grow room with the lights off and all
doors and vents closed wait a few
minutes for your eyes to adjust to the
darkness and you will see any lights
coming in CL up light leaks with tape or
direct intake vents to draw air from a
dark place if you have any equipments in
the grow room that does give off light
remove it or cover the light with tape
to stop it leaking out also flowering
cannabis plants autoflowering cannabis
plants are a little different
they will flower under any light cycle
12 12 or 24 hours of light a day this is
a great advantage as you can grow
autoflowering cannabis plants alongside
vegetating plants or have many autos in
the same room at different stages of
growth light leaks can still cause
problems with autos and you should still
ensure any dark period you give plants
is fully dark with no light leaks or
irregular exposure to light most growers
will grow autoflowering cannabis plants
under 18 6 for their whole lifecycle
some may even push it to 24 but it is
rare that any one grows autos under 24
hours of light once they are out of the
seedling stage
final notes on light cycles for growing
cannabis choose which light cycle will
work best for you and decide if you are
going to grow autos or photos when you
choose the light cycle you should set
the night time to be over the hottest
part of the day for example if you are
growing in summer the hottest part of
the day will be around midday because
grow lights produce a lot of heat it is
advised to run them at night and turn
them off during the day this will make
it easier to keep temperatures under
control thanks for listening Percy
growers
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