first ever grow.

@GrowingGrannie, I topped it about 4 or 5 days ago. There doesn't seem to be any signs of stress so far. The compost I used has enough nutrients for over 4 weeks. She's now 40cm tall and raised the light to 13"

One other thing... you DO know you need to start their nutes off slowly, right? No more than 1/2 strength to begin with - again, autos are finicky!

@JINJAKANT, Did you JUST do this? She SHOULD have been going into pre-flower either this week or next... Next time, don't try all these fancy things - growing weed (and particularly autoflowers) is a challenge in and of itself... it's not like picking up a houseplant at the grocery store and trying to grow it... you need to figure out nutes, waterings, pH, deficiencies, excesses, lights ... there are a lot of expert growers on this site that refuse to grow autos - think they're too "finicky" ....But good luck to you - I'll be interested to see how you do!