No, not a stupid question at all, the defra (govt dept covering agriculture) restrictions which determine what can and can't be imported are extremely complex and confusing. I understand that even people who work there aren't always sure.
I didn't know that you could actually grow from just a piece of root, I always thought that you needed some of the crown. I remember reading about I hybridizer who used to go along her seedlings for assessment with a knife and any that didn't make the grade she just cut off below the crown so I assumed from that that you had to have the crown for it to grow.
The main problem after brexit I think will just be the sheer cost, if we have to have a phyto certificate it gets very complicated and expensive for both parties and two of the sellers in Europe I buy from have already said that they will no longer send to Britain if phyto certificates are required.
