Recovering from Mg deficiency.

I am in the process of fixing a marijuana deficiency and was wanting to know if there is a certain amount of time I should wait after a deficiency before putting her into flower. I am using sensi grow A/B and read a post on here that using that product I would not need to use Cal/Mg with RO water which naturally led to my deficiency. I just FIM'd my plants so it is going to be at least 2 weeks anyway. Also, is there anything I should look for to know that the deficiency has been totally taken care of or is just an absence of symptoms on new growth?

whoops that should have read magnesium deficiency not marijuana deficiency...although that is also applicable...I have been without weed for 4 months...my dealer dried up and since I work in the medical field didn't want to take a chance on getting busted using new sources and lose my license...

I would have just said 7 days. Same with fimming. In fact, i make it the same for most things, even outside in the garden. i.e. fertilising, weed-killing, moss-killing the lawn. I always wait for 7 days and a good rain shower between applications of anything or any cultural processes that may shock the plant.
I figure most operations put plants into shock for 3-4 days, then another 3-4 days to get back to full health/growth.
I know this is very much a generalisation but we need to start somewhere.