Konasdad. Good for you that the asparagus are growing so well and that you didn't weed them. Gotta love that springtime treat that surfaces from the very depths of the earth. The size of the asparagus fronds are deceiving. In the second picture the asparagus looks still not very tall, but when I stand beside it, I cannot reach the top, it is well over 6 feet too. That is how tall the plants get. I cut them down just before frost kill. Around here that is about the beginning of October. Sometimes I get rather anxious about how big they are and how they block my view of my back property, I cut them down early. Last year I did this, it was about September 15. There was no further flowers on them for the bees (of course), and I wanted to do an experiment to see if cutting them down a couple of weeks earlier than I normally do would make a difference to the next year's crop. Nope. Not one single bit of difference.
I believe that the amount of foliage that gathers the nutrients from the beautiful sun above had done enough of its work. Cutting them down 3 weeks early made no hither or dither that I can see. I will cut them down early again this year.
It gets so moist in our climate by the middle of September, that the heavy weight of the dew (and or rain), generally knocks these monsters down. It is nasty to work in really wet asparagus branches. I would rather cut them down before the heavy rains start, where the sunshine from the day still has the warmth to dry them out and they can be handled with ease.
I do not compost the asparagus fronds. I either burn them or take them to our local dump to be disposed of there. They carry the larvae of the asparagus beetle, and these beeetles love to live in the asparagus compost. I have worked very hard over the years to keep these two species of beetles under reasonable control and I know for a fact it is because I don't compost the leaves. Well, well, I can go on. Have a wonderful day, great life. Cindi