I have quite a large collection of shop-bought cultivars. I have two related questions that will help me get started propagating. 1. My shop-bought cultivars appear to be grafted onto a vigorous root stock that I assume to be wild type A. palmatum. With a view to grafting, I collected and germinated many seeds from my cultivars. After 4 to 5 years only a few had produced stems 0.5 to 1 cm thick. When I turn out the pots I found that the roots are feeble and have not produced a dense fibrous network like those of my shop bought cultivars. I am therefore reluctant to graft onto these feeble root stocks. My question is whether I am just unlucky or whether I need to source wild type A. palmatum. If so, where can I get them? 2. My shop-bought cultivars ranged in price from about £25 to £60 in the UK, depending on size. However, the spring before last the gardening store B&Q was selling many different cultivars in 2 inch pots for £4.99. I looked at these small plants and they appeared to be growing on their own roots, which made me suspicious. However, at that price I thought it was worth investing in several. The ones labeled as Katsura are very vigorous and have been a great success. The tops and the roots have grown surprisingly fast. The Wilson Pink Dwarf turned out to be a Dissectum (as I suspected). My question is how the company is producing Katsuras without grafting? They could be air layering. In this case I am surprised that the roots are so vigorous, given my lack of success propagating from seed. Any insight into these issues would be gratefully received. Best wishes, Ronnie.