I hope your grow starts out as good as mine. Those black pearl seem to be some vigorous plants. They're out growing my other strains big time. The largest one is 3 inches and it's well into the second set of serrated leaves. Even the shorter ones are well into their second set of leaves. They've been in dirt for 5 days and out from under their moisture dome for 2 days now.
If there are a few ladies in the mix and if they keep up their growth rate I will be a very happy guy. My hope is for the potency to be there. That's the most important thing I'm concerned with. A big yield is always great but if the potency isn't there it doesn't matter how big the yield is. We'll see in another 4 or so months. Let us know how your grow goes.