First I had to clear the bed they were going into of weeds, then I spread some of last September's chicken manure over the area. Just doing that took about an hour. Then I carefully dug up the young plants, separated them and transferred them into the new bed. That took over an hour.
I didn't think I'd sown that many seeds, but the plants now fill a 30 foot by 4 foot bed. It was a very sunny day, not ideal for this job, and by the time I'd finished my vigorously healthy young plants were looking anything but:
I feel like I've murdered them all.
This evening I've given them a thorough watering-in and there's some good rain in the forecast for tomorrow night. I hope that will be enough to perk them up a bit. Once they're back in a more upright stance I'll spread some grass-cuttings around them as a mulch to keep down some of the weeds.
I'm hoping this will be a better year for brassicas than last year was - even if it doesn't look terribly promising right now.