I've bought seedlings for rosemary. Last year I grew oregano from seed and from seedling, and by the end of the season saw no real difference in them!
I grew wild thyme from seed last year. By the end of the season, it was cute and bushy and I had a lovely harvest which I dried and used all winter. Then it started growing again in early spring, and before the snow was even all melted, it was JUST AS BIG as it had been at the end of last summer! Now that it's been growing a couple months, it's now twice as big as it was last year! We haven't even had our official 'last frost' date here yet (though it is the most bizarrely warm and early spring on record...)
I've also got huge basil growing in my indoor pots right now, waiting for last frost to transplant outside. Last year I grew dill straight from seed in the garden, they got HUGE and I made yummy pickles and had lots of seeds saved too. And I grew summer savory straight from seed, they also got huge and yummy!
Heather, mom to Caileigh 12/06 and aspie ADHD prodigy David 05/98 :intact lact