Help!!! First grow

When should I transplant my seedlings they are now 8 days olds?

Transplant into what? bigger pot? Hydro cup..

You need to provide a Little more Info jayjay313, How tall in cm are they? what have you got them in at present? RootCube/Rockwool/seedling compost??

What about putting a Pic up....not sure if R.I.U. has a 10 posts before being allowed to up-load Pics, I'm baked and can't remember if that's this site or another.

What does the Root structure look like if you can see it?

Is it a Photo-period seed or Auto

Peace

Oh and Welcome to R.I.U.

Pictures also help alot! The more information that you can provide the better answers you can get