My outdoor auto Frisian dew has lots of yellowing on bottom leaves

I've given them a good feeding of nitrozyme and greenfuse but do they really need feeding as they're autos?
Last year they didn't have any nutes but they did perfectly fine until harvest


Also a small problem I have is it has tonnes of popcorn buds and the main cola is absolutely tiny.
However I was told to leave them as they're autos so I didn't want to stress them too much. During veg i lst'd but took string off too early and grew back tall

Autos dont determine whether they need feeding your medium/strain does only on heavier this or that. What are you growing in? Most soils last up to month with no nutrients. Youll have to post pictures so we can try to get a better idea of issue at hand

Usually yellowing of bottom growth means nitrogen deficiency if I remember correctly. Autos have been nothing it than temperamental fricks for me in the past but just going by the sounds of it you need to to get some granular top dressed and water with a soluble instant/fast acting fert

Here is a photo. My other Frisian dew are a bit bigger

This is a newish pic but I cut off all the bottom branches so the plant can focus all its energy to the main cola

Well it looks good an. I wouldnt worry at all. Usually as you near the end of flowering leave will naturally yellow. Keep feeding it snd don't stress