The leaves split, what should I do?

its the genetics . Nothing you did .
Is this bag seed ? Seed from bud you were smoking ?

 

Now its totally up to you . ido not allow disapointment in my grow room.
You can let it go hope it produces a quality bud. Or call it a learning le sson . start over . Buy some know good genetics . My opinion is never buy anything from a dispo and for clones from a dispo never never more on that opinion if you want ask .
Now some plants are what i call freak on a leash . They will grow out of it and turn out well. Usually right out of seeding . What i am seeing its past that point and already lost it way . I am not you . I have a shit ton of electrictity bills to pay if that plant fails i pay for the e bill no matter what .
If you want to know a good place to order good seeds ask .
My opinion is 80/20 80 in favor it will produce bud that does not herm . And another 20 % odds those buds turn out strong like you want. 80 agenst .

 

Agree about the leaf that it is just genetics and no big deal. However, I disagree about odds of the plants being inferior to the mother. I think that they are very likely to be just as good as the mama plant, if you give them good care.

Since you bought your buds from a shop, the likelihood is that the seeds are from a "stress hermied" plant- an older virgin plant that in a last ditch attempt to make seeds, makes a few male flowers and creates a few "selfed" seeds. If they are "stress hermie" seeds, the plants will be female and very much like the mom since they have only her genes and no others that might dilute the potency.

If they had been "street weed" seeds, bryan oconner would be right about the risk of lower potency and disappointment. Illegal growers are not always as careful about the genetics (or care) of their plants as they should be. But even so, I think it is a good idea for first time growers to make their beginner's mistakes on free bag seeds, rather than expensive "named" seeds from a seed vendor.

Granny