going from 20 hrs light to 15ish

[imgrowing]

turned the timer up to 20 hrs light for photos. how long should i leave them inside before i put them outside to start flowering?
current sunlight hrs are 14 hrs 50 min here and getting longer until june 21 which will be 16 hrs sunlight.
1st time doing photos outside so i have no clue, southern vancouver island.
i want them to start the transition to flower asap once outside

 

[RoadKillSkunkHunt]

turned the timer up to 20 hrs light for photos. how long should i leave them inside before i put them outside to start flowering?
current sunlight hrs are 14 hrs 50 min here and getting longer until june 21 which will be 16 hrs sunlight.
1st time doing photos outside so i have no clue, southern vancouver island.
i want them to start the transition to flower asap once outside

You can put them outside if the weather is fit for plants. Warm days with night time temps in the upper 60s/low 70's is ideal.

I know nothing about Vancouver Island. Are you beyond the danger of frost?

Edit: When does your day length drop back below 14hrs of daylight? That's the time when most outdoor photoperiod plants start flowering.

 

[imgrowing]

no worries about frost, my question was more about if the girls were used to 20 hrs light then went to 15-16 hrs light outside to start flowering, how long should i keep them at 20 hrs to make sure they don't re veg.
weather can turn ugly here mid sept so would like them done then, hence forced flowering asap.

 

[RoadKillSkunkHunt]

no worries about frost, my question was more about if the girls were used to 20 hrs light then went to 15-16 hrs light outside to start flowering, how long should i keep them at 20 hrs to make sure they don't re veg.
weather can turn ugly here mid sept so would like them done then, hence forced flowering asap.

They won't start flowering until the daylength is under 14 hrs. 15-16hrs of light won't trigger flowering.

Frost danger only determines when its safe to put young plants outside. In the fall, your enemy will be dew point. The wet nights of fall cause lots of grows to go sideways at the very end.

 

[imgrowing]

They won't start flowering until the daylength is under 14 hrs. 15-16hrs of light won't trigger flowering.

Frost danger only determines when its safe to put young plants outside. In the fall, your enemy will be dew point. The wet nights of fall cause lots of grows to go sideways at the very end.

not sure how to word this correctly, what i mean and what i say and type always turn out wrong, but here goes.
lower vancouver island doesn't get 14 hrs or less sunlight until october which would make it impossible to grow photos here.
don't photos sense diminishing hrs of sunlight and start to flower?
hence 20 hrs to 14-15 hrs

 

[RoadKillSkunkHunt]

not sure how to word this correctly, what i mean and what i say and type always turn out wrong, but here goes.
lower vancouver island doesn't get 14 hrs or less sunlight until october which would make it impossible to grow photos here.
don't photos sense diminishing hrs of sunlight and start to flower?
hence 20 hrs to 14-15 hrs

Not like that, no. There's fast-flowering plants but that only moves day length by 15-20 minutes. You still have time to start some autoflowers. Its what will work best outdoors in your area. Some are surprisingly potent.

 

[imgrowing]

ok all good, but explain to me how people at latitude 48 can possibly grow photos outside then?
here it would take until december to have 14 hrs light or less for 10+ weeks for the girls to ripen.

 

[RoadKillSkunkHunt]

ok all good, but explain to me how people at latitude 48 can possibly grow photos outside then?
here it would take until december to have 14 hrs light or less for 10+ weeks for the girls to ripen.

Light deprivation would be the most likely.

If a grower in your latitude is finishing a photoperiod plant, it was likely bred there to fit the climate. It's what happens in Michigan. Michigan growers also don't run plants that take 10+ weeks of flower to finish either.