Is this plant dying?

Hi all,

Doing a small closet grow, things are shaping up and they have just finished week 3 of flower...

Just noticed the smallest plant of the bunch the past couple of days has been wilting and struggling and its only got worse... I gave a flush and allowed the medium to dry out.. I thought maybe it was too much water as I have been watering a lot but its coco coir and the other plants seem to be loving it so...?

Either way the medium dried out somewhat at least but wilting became worse... I am thinking maybe it could be the nutrient solution? as the other plants are obviously much bigger and stronger and can take more.... maybe the feed is too strong for the little one? Let me know your thoughts...

Here are the photos:

< This was a few days ago before any problems


< This is now The plant looks pretty bad, the past couple of days its just collapsed. what is going on? :S


Oh also any ideas on what kind of yield I should be expecting here? I know its pretty much impossible to guess but for the experienced out there a rough estimate would be appreciated providing everything goes well... Thanks for all of your help and yeah... I know i lost control of the net xD