I presume you mean Globe Artichokes & not the kind that give you WIND?
I have done it both ways. Offsets are much quicker & consequently much more expensive! I didn't have much choice this year as all offsets had been sold & there was already a waiting list for next year.........!!? Everyone is digging up their lawns, planting veg & fruit & ordering chickens. At least they will also be able to stop their subscriptions to the gym (& save a bit more money)!
I sowed my seeds in April & plan to transplant them out of their pots in the Fall for eating the chokes next year. If I had sown the seed in January I could probably have got them this year but it was a long hard winter here in the UK -- the coldest in 19 year!
I started them in the house, then transferred them to a small portable greenhouse followed by re-potting into larger pots which I now have transferred outside. They are now 4"-5" high and have 4-6 real leaves.
I didn't give them the cold treatment -- mostly because it wasn't on the packet & I didn't read up about them because I had grown them in my previous garden where they had done very well. But this time I planted the variety that has small violet coloured chokes. I'm also going to grow some more large ones --the seeds arrived today.
If you are about to sow the seeds I would try 50% with the cold treatment & 50% without . I'll do the same.
Hope this helped. :happy_flower
HAPPY GARDENING. :tools
:rose Hattie :rose