dying leaves

First time grower here I had left my plants for one day and when I came back they were drooping and turning yellowish green. Could this be a nitrogen deficiency? Let me know if you can help I don't want them to die!

HI. I appreciate all the help from the kindest people here.you guys teach me ALOT. I almost Panic, I CANT screw up this grow.NO NO. My plants are in day 80 of flowering ,Some people say my plants are pure sativa ,thats why they are taking this long.I am ok with that,(kinda.no other choice) I...

Hey guys, So today I went out into the garden and noticed on one of my tops, all of the leaves are wilted and hanging down completely. When I checked on the plants yesterday there was no issue. At the top around the biggest part of the bud, all the leaves are pointing up towards the sky, but...

Hello and Happy Thanksgiving Eve ... o_O I have (2) mother plants which are no longer looking healthy since their nutrient solution was changed about 10 days ago. I did look at several diagnosis guides provided on this forum and have some thoughts about what the problem is, but since this is my...

So this would be my last option as to rooting out the soulution for my problem. I have researched as far as I could as well as talking to my local hydro store owner. My guess would be a nitrogen diffecency. I got these plants as clones due to my buddy starting a industrial grow op. He had cloned...

My tempatures are around high 70s to 80 in the day, and drop to the high 40's to high 50's at night. Humidity changes a lot but 50% would prob be the most frequent. It seems to be warming up a little bit recently but havnt noticed too much improvement in the plants. Problems noticed: - slow...