Yeah man, they'll most likely root... The yellowing of the bigger fans is completely normal.
The nitrogen is being used to grow the roots and shit, no worries. The new growth is healthy, and they aren't falling over... They should pop roots in 5-7 days, don't worry if it takes longer. As long as they look good, they're good.
Chill out holmes, it's all good man... Guess you don't know about the whole over-grow fiasco.
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If you wanna do what I crossed it's pretty easy... Get Silver Pearl from Sensi Seedbank, and cross a male with Somango from soma seeds... I've got 3 phenos that are all worthwhile... I'll show you guys later.
The 9Mile, it can be aquired by visiting Bob Marley's masoleum, located in Nine Mile, Jamaica. It's grown out back, the locals will be happy to show you their small "plantation" and sell you some decent herb... Also this is where I got the best finger hash. Well worth it.
But I advise, bring plenty of extra US one dollar bills, if you give one to each of the dozen or so kids, it's enough to make them happy, of they ask for more, say "sorry I might have to share with someone else"
Oh, and money is "food" so, when they ask for food, they mean money...
And my super skunk is also from Sensi Seedbank...