If i want to incorporate new aparagus plants..i usually do it in the fall. After i place some ash in trench, and the raw peelings of harvest I cover it with soil then place asparagus crowns. keepin the crown above soil line. I back fill trench with more soil. Plants are "staggered" from older ones. Then well water and again all covered with leaves..The following spring another trench is dug completely around bed and potatoes planted inthis new trench..My apoligies im very tech challeged After potatoes are planted Is when i flood the trench, usually with water from duck ponds..this waters and fertilizes newly planted spuds. Ducks are usually turned into that garden the followin day.
I agree with you, not that i NEVER rotate, but when i do its for a specific reason. EX. beans to set nitrogen where i planted onions the year before. Im about zone 5? but plant as if zone 3, good thing to as last few years we have had 20 below TEMPS in winter months.
#2 #4 i cut ferns (after they are dead) and pile them in middle with dead tomatoe plants..this is into our fall, usually sept/oct so plants are dried and its usually cold. I burn them in place. If its going to rain i cover the material with a tarp so it stays dry and burns quickly..if it hasnt rained i water around the plants to contain the burn. Some ash is sprinkled around the bed, while most left in middle. Then the Peelings from apple and pear harvest are dumped on top of ash in middle or in trench, NEVER on the aparagus plants, to help feed over winter. Then leaves Collected are used to cover complete bed. This bed is then "finished" and "prepared" for winter.
#3 After years of doing this my soil is dare i say close to perfect? In spring i Do not remove leaves i simply plant in them..so potatoes are laid on top of the leaves then covered with enough dirt to "bury" the eyes of that particular one. Usually about a pint of soil does the job. One could cover whole trench with dirt but I found that a waste of time, effort and soil. Then more leaves to cover. I water, to fill trench, and give taters a good drink, again usually with pond water as they need drained and cleaned anyway.. Ducks are turned into garden next day..This step usually around GOOD FRIDAY..so it can be a couple months before tomatoes are planted..i do not put tomatoes in the ground until mothers day..
I have some in civered beds and houses but not in this circular bed.