whats wrong...if anything?!?

nice plant. u might have given it nutes a lil early. doesnt look to bad though wait about 20 days to give it nutes let it recover. ur plant is bushy cuz its mostly indica. also when you put your plant into flowering it will double and can triple in height. wait till your plant gets a foot tall. then put it into flowering. make sure you have enough head room for the plant to double in size at least

Looks like a possible calcium def. Newer leaves are turning yellow. Check out cal. def. here:

Self Diagnose Your Plants

By the looks you've got a mostly indica strain, They'll stay pretty bushy, not really a problem.

Thanks..... after reading think they may have a bit of heat burn....

Originally Posted by Just4ulondon

Thanks..... after reading think they may have a bit of heat burn....

Its overwattering!!

let her dry out

plants cant get 2 bushy imho

The aperance of cal mag deff. is do to the drenched roots locking it out.

Dont feed nutes till 1.5 mounths of vegging

Fallinghigh..... many thanx from london... x

I agree, the droopy leaves look like a case of overwatering to me.
Here's a good trick to not overwater your plants.... mark it down on the calendar everyday that you give water.... you will notice a pattern developing... (most plants will need water after 2 full days without, sometimes 3 full days)... a good rule of thumb is to water your plant when its about a photoperiod away from totally wilting.

Originally Posted by fallinghigh

Its overwattering!!

No question! Wrinkled leaves are a dead give away.

Let her dry between watering and them fan leaves wont droop lke that....

Nothing you can do bout the ones already yellowing, just let them die off.

That seems huge for 3 weeks and soil grown but I'm no expert.