That's can't be possible... Its been getting natural rain water. And when I started my soil I put bone meal blood meal and worm castings. And this just appeared about a week ago.. And I have not used any fertilizers. And as much as it's been raining... Crazy
Aye up m8, Rain Water can contain impurities(in fact some Growers say DON'T use it) Bone Meal/Blood Meal and Warm Casting do have N-P-K and nutrients are released every time You water....PLUS Miracle Grow?
What size Pot have You got them in? You can pretty much Veg forever and a day, as long(I think) as You allow 1Gal(4.5L) for every month of Grow(I think its that?) How much do You give em when You water/Feed(Litres) em and how often? every 2? 3? Days
Looking good so Far, maybe VEG for longer, Pot-on into BIG Pot, and start training them for a better Yield...Top/F.I.M. and don't forget SuperCropping...maybe even take some Clones IF you Vegging for Longer...keep the strain going...
Then Find a Cupboard indoors? Say 3 x 3 x 8 paint it matt white(make sure its LightProof-No Leaks) Bang a 250w/400w Hps/Mh in there and stick on a Timer 12/12...
YOU CAN STILL HAVE A GREAT HARVEST!! it depands on YOU!
Good Luck