"PLEASE HELP" they wont grow

I need some advice from you "PLEASE"
I put down 2 seeds 4weeks ago, the first week all
looks good but now it seems they have stopped growing,
they look just the same as 1st week "i need help urgently"

I placed the seeds in 3inch rockwool block, only spraying them
with water, under floro for 18hours dark for 6hrs, i am in sydney australia
so tempature is constant 26 C or 79F... what am i doing wrong
and also when do i hit it with nutrent... plans are only inch in high
(30cm) with 2 small leaves... your help and advice would be great,
thank you..
Regards Darran (From Down under)

hey darran did you put them staright into 3 inch cubes from seed?

and are they 1 inch high or 30 cm as they are not the same?

What is going to make them grow? It's not like they are in soil where they can root for food. Rockwool is inert, no nutes in it. You need to supply them. It's called hydroponics.

Suppying nutrients to a seed is not a great starting point for any seed, regardless if its hydroponics or not.... i replanted another seed using the same method as the previous seedling. This seed has over taken the other within 6days over the 4 weeks previous has been in... i but this experance down to a weak seed, thank you all who provided there experance to assisted and for those who did nt, keep on trying
Regards
( Dazman From down under)

You said you have 4 week old seedlings, in rockwool. Yes, you need to supply nutrients to them. I don't believe it's any different in the southern hemisphere.

i have heard from many people that nutes is bad when they are small and young. that is for clones and seedlings alike. plants have to get to al 12 inches b4 you begin to do any kind of flowering and that nutes come after that. i grow hydro btw.