Are the 1000 item shipped in a season achievements implemented yet? If so, I believe I found a bug. I shipped easily 2000 items, and certainly more than 1000 items over the Spring of Year 2, but did not see any achievement or other message pop up. I did not see if the new seeds were available for sale. This is using harvest festival 0.6.0-218, in the Farming Valley modpack (with modtweaker scrips changed to work with 0.6.0 of harvest festival).

Then you unlocked those crops. You'd need to talk to her again.

Do I have to be in the same season as I got the thousand in to see this?
EDIT: To be clear, I talked to her many times, both while the shop is open and closed.

Yes of course. The crops aren't going to be unlocked unless it's that season.

They are working. You have to chat with Jenni to unlock them. (Sometimes twice).

She said that melons (and something else?) was unlocked, but it didn't trigger the achievement (and she didn't mention cabbages). Is that the correct message?

Ok then. I'll see if they appear in the next year. Thanks!

Sorry to respond so late, but everything is working now. I might suggest that you make it so that the achievement triggers when you harvest 1000 crops rather than when you talk to Jenni, but that is just a suggestion.