Dear Jean, Tropaeolum has been a very challenging genus for me. I've grown a few from seed, but we are talking only a few plants out of lots and lots of seed started. Two I grew from seed in the last couple of years bloomed the first year and were not growing in a big pot either. But since only one of the seeds germinated in each pot there was a lot more room for the tuber. I just kept them in the same pots I started them in and tried to rig up a climbing support. When I emptied out the pots, one of them had a nice tuber and the other had nothing. The one with a nice tuber sat the year out the next year and didn't come up at all, but this year is up. Many of the others I grow have yet to make an appearance this year so it looks like I'm having my usual lack of luck. When they first come up (from seed or a tuber) the shoot is so tiny it is easy to miss. If snails or birds see it first you can forget the season. And the shoot is very fragile and if broken off by the wind or even a human trying to get it started on a support may not regrow. And if it dries out this is another recipe for disaster. So you have to watch carefully and be nurturing. Bill Dijk has a nice picture on the wiki of the support system he uses for his. If you have already planted them I'd check them often for signs of life and pot them on very carefully after the shoot has grown a little but when they are still small. They will want to twine very quickly and without support will fall over and it will be harder to transplant once that happens. You aren't supposed to do this with bulbs, but a lot of us have if you just slide out the whole lot carefully and angle it on the top of a larger pot with soil already in it. I don't think you'd have much luck if you leave any that germinate in a six pack. But since I've had dismal luck growing these from seed hopefully others can give you better advice. Keep us informed about how you get on. Mary Sue