A ? about bloom nutes

hi guys, just watered my plants & changed my timer to 12/12. I was just wondering how soon i can start to give them bloom nutes?
Also i read somewhere on here that before changing light cycle the plants need 48 hours of darkness, is this so ?
thanxs skye

as soon as you start 12/12 hit the bloom nutes man. and no 48 darkness needed either man. peace

Lets just say that you never changed the light cycle... whenever you would have given them their next feeding (in veg) would be the time to feed em. So if you feed em once a week.... and its been a week since their last feeding... then its time for more nutes. I don't know about the 48 hrs of darkness. I've never done it and don't see how its necessary. My plants do just fine without it.

thanxs for the quick reply guys, just wanted to make sure before i hit the sack, i gave them just water before they went to sleep so il start adding bloom nutes when i next water them.
will they be ok to have a 2 hour lie in tomorrow, they have been on 6am till 12am whilst in veg, but i want them awake 8am till 8pm whilst in bloom?