Hello everybody, I actually don't know how to...

hi, i guess you are watering them too much. the soil looks very wet. roots need to breath. let the soil dry out and water again only when pot is light

Hello guys, Thank you all for your replies . They have been super helpful . I took information on various websites and I read that the most common reason of tall stem is lack of light. So I'm using biobizz light mix Unfortunately I cannot keep the temperature higher than 19 C. The humidity is between 55 and60%. I'm doing a 20/4light schedule. The nutrient I'm using are the biobizz. Activera root juice and bio grow. I can't measure the pH for now because I don't have any instrument. Thanks again for all your help

LOL. It looks fine. It's still a baby. What are your readings? Temp. Humidity. Light schedule. Nutrients. Water pH? What kind of soil? It looks like you have not started a diary yet.

The pot is perfect, u can let it grow there , maybe add some soil on the top to fill the pot and cover a little the stem. Wait every time until the pot is full dry before give other water , don’t put your finger in the soil only lift it and after u know the weight of the dry pot is an easy task and the plant will thanks you, she also need a good dry/wet cycle. However , your plant is nice looking and healthy now, your biggest task now is only to raise the light when is needed ✌️🏽 Hope to be comprensive and useful

I was told that the soil was very wet so I stopped watering for a day and half so far. I also read that if the stem is tall they maybe are not getting enough light, so I moved my 600 watt (the actual power is lower) led closer to the plant, about 30 cm. Do you think this is a correct way to proceed? Thanks a million for the help!!