@XiaoLong
That's a fine specimen Xiao.
I started with a couple of small 'Rothschildias' tubers purchased at MOBOT (Missouri Botanical Garden), St Louis well over a decade ago. 90% plus all grown in large pots/containers. As a general rule of thumb the tubers proliferated at a 2 to 1 ratio; example - 10 tubers into a 16" pot would yield 20 fine flowering size tubers (w/ 2 to 5 flowering tips each) for the next year. When the total yield surpassed 400 tubers I had to reduce my expansion efforts. Last year saw only a few large pots used instead of fifteen or so.
Over the years I added some greenii (5) and last year tried the carsonii (5).
