Anyone know what’s wrong with my plant? Has had ...

No problem glad we could be of some help.

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.

Let me know if you need any more help with this, you can use the DM feature. Your inbox is the little green arrow at the bottom right of the screen. Cheers,

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.

Those appear to be a mosaic virus or tobacco mosaic virus.. not a huge deal.. But yeah I think it’s a watering issue or something goin on in the medium..

@jdbrown hi mate firstly it seems you may be overwatering a tad too much the roots need more air can I suggest you start using the "lift" technique which is to pick up the pot straight after a water get a feel for the weight then when it is almost dry do the same again . that way you should get the feel for when it needs a good drink simply by picking up the pot and feeling its weight 👍 Also during flowering try to lower the humidity to help prevent mold problems later on

She is overstretched so maybe hungry ? CalMag with good pH is must for her. I see mag first signs of deficiency ... Lights could be overblasting her too .. All the Best !