I don’t harvest any spears less than a pencil thick and several of them flowers and I had little red berries all over the place. Would well composted manure and wood ash work, too?
I know it takes a few years for the plants to become really well established. It’s just so frustrating waiting for that.
The new owners of our NY house are enjoying a fantastic asparagus crop. Glad for them but not for us.
If your patch is new, just go with the 10-10-10. Compost is all nitrogen, and I don’t know the ratio to mix that with wood ash. Also, remember that these crowns are BABIES - you can do damage by over-feeding them, too ya know!
You think YOU left behind treasures at your old place? I had a well-established 40 foot row of asparagus that I had to leave behind, as well as all of my mature and producing fruit trees, raspberries, blackberries and all of my gorgeous Hydrangea. (I added 5 here this season; more to come!)
That’s the only bad part of leaving a farm of 25 years - you can’t take all the good, mature stuff with you! However, I sold my other farm within days due to the 25 years of effort I put in there. ;)