Рано для первых стигм?

other than size, its looks super healthy. A bit green-meaning a bit too much nitrogen but other than that it looks good. Unfort some Autos will switch to flower in week 3-4 and others will switch in week 6-8. The final size depends when it switches and you cant control this. Good genetics help as they are more stable and tend to go a bit longer before switching to flower, but as far as what can you do here? Not much. Just switch to bloom nutes now and go easy on the feeding for the first two weeks and then bump it up a bit after that. If you want bigger plants then use Photoperiod plants. Or look for autos that are known to get bigger- after lots of research im trying Glueberry Autos (gorrila glue x blueberry) now. Strawberry Banana autos are another thats meant to be on the bigger side. Your plant may end up bein smaller, but she will likely give you some very excellent bud judging on her looks.

Top it. It can happen in autos I've seen just the top site showing signs of stigma. How big is your pot size. Top it and uppot it if it's in anything smaller than a 9l. Other than that she's gonna be a runt she is way to small in size for this to be happening yet pal. Top her and watch for signs of growth. You have enougj nodes for it to take off and topping her might throw her focus back into growing. That's my suggestion good luck buddy.

I saw the first stigmas, many call it pre-flower. The plant is 3 weeks old. Thank you for the help.

you mean your plant started to flowering ? How many weeks does have the plant ? If it's the case, yes, your harvest will be modest but nothing is done yet ! You should try to some LST to optimize your grow, and the stretch didn't started, so maybe you will have a good surprise !