Asparagus - no dig, planted in mulch over weeds, how to grow and harvest

https://www.youtube.com/watch?v=FM_SJJ95k8gFilmed in summer of asparagus year 6 after a third season of harvests, this year 2018 we picked 15.5kg/34lb of spears. The asparagus plants are growing on level ground with no ridges, easier for weeding because very few grow. We are a zone 8, temperate climate with around 800mm/32in rain per annum. My garden includes 1000sqm of no dig beds (a quarter acre), growing salad leaves and some vegetables for sale.