I had 2 x 20' rows of asparagus in their fifth year, grown from seed. I was looking forward to harvesting them last year, but the spears were extremely spindly and turned to fern at 6". this year no sign of any of the crowns. I have bought more seed and will endevour to grow some more, but I will plant them out in a different location as the bed was rather wet over the late spring............... well, flooded much of the time and I expect the existing crowns have rotted.