NZ calling...I had a fantastic crop of shallots this past season with 2 different varieties and no sign of any diseases. I am keen to plant into the same bed again. Do you see any issues?
Shallots Planting Year 2
Certified GKH Gardening Expert
It is recommended to crop rotate your shallots planting location each year.
I personally have planted them in the same bed without any issues. I do add a fair amount of compost each each to the raised beds before planting.
Here is a link to shallot growing and care requirements.