My guess is that Santa Rosa sells 2nd year , everything I've received from them has been a nice size for a 4 inch pot. They run some very good sales during the summer and start of fall and check for coupon codes . Mason Hollow carries a lot of new varieties that would be first year , but give you a call to see if you want them if they are to small. There is another place I have not tried yet called PremiumPlantPlugs.com
that looks to have good prices.