I don't have a winter.
I cut all of the fronds down about March. I only harvest from the older crowns that have spears larger than a no 2 pencil. I can harvest twice a day for about 2-6 weeks . Then I put some more compost and a little manure on them and let them grow through summer
In September, I can cut the tops down again for a second round of twice daily harvests, and I repeat the compost and manure and I throw in some bulb food.
I planted my asparagus the traditional way by digging an 18 inch deep trench. Working some compost, manure and bulb food in to the bottom and planted the crowns and seeds of Mary Washington, I started.
Every year the roots grow up and I fill in the trench a little more. I used to pull the female fronds, but I almost lost my patch so, now I keep them all. I just got some Jersey knights this year so I extended my asparagus hedge a little longer.
Happy gardening in Hawaii. Gardens are where people grow.