First Grow

Thanks for all your replies, unfortunately I cannot DM any of you yet as my account is less than 24 hours old and this feature is not available yet. Just to go through some of the answers I did suspect a Calmag deficiency and bought some calmag and have been adding to the feed for a few weeks now. Also ph has been checked and is within the right levels from 6.5-7 ph the lights should be at the right height and they are now on 100% i was slowly increasing throughout the weeks. The overwatering could be a possibility but I have been careful with this only watering when the top inch is totally dry i also have a meter for checking deeper in the soil. I usually only water once dry and the plant is drooping a bit. The other week i didn't water them for about 5 days. Last week I did water the bigger healthy plant and the sick one as this was drooping a lot too. When researching the leaves I did think it could be this mosaic virus or tobacco mosaic virus but it says its contagious between plants and some of the leaves are touching other plants and so far I have not seen it spreading to others. I know the pots are a bit on the small size I was trying to find out exactly what size they are but it don't say on the website. I will measure them when I am home. I bought the kit as a whole and I don't think bigger pots will fit with 4 plants. I think on my next grow I may only do 2-3 plants depending how big these end up as I think room will be an issue when it comes to the late flowering stage. I am slowly reducing the humidity levels I'm now at 52% going to reduce another 5% this week and I think flowering should be between 40-50% so this should be doable without having to invest in a dehumidifier. As its quite cold outside at the moment so the air is quite dry from the heater maintaining the internal temperature. I have a humidifier on Humidistat so this maintains a constant humidity level. Again this is my first grow I have no previous experience in growing all the info I have got has been from online forums and YouTube videos . I very much appreciate the help everyone can give me.

If your plants are already 5 weeks old, they most likely need some food. The pots look a little on the small side too, 5 gallon is a nice size for auto’s (not quite sure what size yours are?). No idea of how often or how much you’re watering so it’s tough to say if your sickly plant is overwatered or not. All in all, they don’t look too bad so I would try some fertilizer and a steady wet to dry watering schedule. If the sickly plant doesn’t respond it’s possible you just got a bad seed/plant. It happens sometimes and if it goes that way- just remove her from the tent and allow the other plants to benefit from the additional space. Hope it works out for you and all the best growing forward! 🤜🏻

But I’d let it go for a bit- see how it initiates flower before you decide it’s fate. Sometimes runts like this go crazy in flower and surprise me at the end.

Its quite common to get a N difficiency in week 4 flower. I wouldnt give it too much attention because the "fault" already has been made. The plant uses so much nitrogen when its going into flower to stretch her arms that you wouldnt get it all green again in my experience. To solve this problem i used to not switch from grow into bloom nutes when i switched to 12/12 but i let the transition be smoother. and this is defenitely better with a stretching plant. For example the first week of 12/12 no bloom nutes at all. From the moment u see real budds forming u start the bloom nutes for like 1/4 of total feeding. and around end week 3 you should be at full bloom nutes. Good luck!

It is nitrogen deficiency and it is not a bad thing in flowering. Your plant wants more potassium and phosphorus as well. Likely more water. You should get run off when you water. I would add a light nitrogen in feeding, and a nice dose of potassium and phosphorus.

She looks hungry to me.