Xare: so what would you suggest so that doesnt happen??? gradually change the lighting before introducing outdoors???
Photopheriod acclimatization of clones means that you synchronize your plants indoor lighting with the natural lighting outdoors on the day you intend to plant.
The goal is to minimize the change in lighting times when you place the clones outside.
For example. If you plant around May 20th, there is 15 hours of light outside on that day (for my location). So your inside lighting should be on for 15-16 hours a day.
What you are trying to do is keep the plant on the verge of flowering while still being in the veg state. You want to put them out as soon as your local conditions will allow. But you also want to keep them in the vegetative state.
Its important that the light comes on when the sun comes up, and the light goes off just after the sun goes down. ( for your targeted planting day )
Start planning for your outdoor planting two or three months ahead of time. Move your mothers from your veg room on 18/6 lighting to an outdoor prep room with 16/8 lighting. Then root your clones under this lighting schedule and grow them up to the size you want to plant them.
All this is done so that the day you plant outdoors the clones are synced up with the Sun.
If you follow this lighting regimen you will not need Supplemental lighting in the Garden to keep your plants in Veg.
Clones that have a chance to go outside should NEVER be under 24 hour lighting. The clubs know this... but they make their money on repeat customers. Not Self Reliant ones.